TY - CONF TI - Investigating Process-Structure Relationships of 3D-MeltBlowing for Tissue Engineering Applications AU - Schuchard, K. AU - Pourdeyhimi, B. AU - Fisher, M.B. AU - Shirwaiker, R. T2 - Institute of Industrial and Systems Engineers Annual Conference C2 - 2019/// CY - Orlando, FL DA - 2019/// PY - 2019/5/18/ ER - TY - CONF TI - Nonwoven Sustainability (Keynote) AU - Pourdeyhimi, B. T2 - Nonwoven Research Academy, EDANA C2 - 2019/10// CY - Denkendorf, Germany DA - 2019/10// PY - 2019/10// ER - TY - CONF TI - Recent Trends in Nonwovens and Sustainability AU - Pourdeyhimi, B. T2 - RISE C2 - 2019/9// CY - Raleigh, NC DA - 2019/9// PY - 2019/9// ER - TY - CONF TI - Anisotropic Scaffold Fabrication using High-Throughput 3D-Melt Blowing AU - Schuchard, K. AU - Anderson, B. AU - Grondin, P. AU - Fisher, M.B. AU - Pourdeyhimi, B. AU - Shirwaiker, R. T2 - Biofabrication C2 - 2019/// CY - Columbus, OH DA - 2019/// PY - 2019/10/20/ ER - TY - RPRT TI - Elastomeric depth filter AU - Pourdeyhimi, B. DA - 2019/11/5/ PY - 2019/11/5/ M1 - 10,464,000 M3 - U.S. Patent SN - 10,464,000 ER - TY - JOUR TI - Modeling Polymer Crystallization Kinetics in the Meltblowing Process AU - Ghosal, Arkaprovo AU - Chen, Kailin AU - Sinha-Ray, Suman AU - Yarin, Alexander L. AU - Pourdeyhimi, Behnam T2 - Industrial & Engineering Chemistry Research AB - A novel model of the crystallization process in meltblowing process is proposed and implemented in numerical simulations. The spinline crystallization is studied using numerical solutions of the system of coupled quasi-one-dimensional equations describing the dynamics of multiple polymer jets moving in the surrounding high-speed air. Cooling, crystallization, and solidification accompany three-dimensional motion of polymer jets resulting in their vigorous stretching by the air flux including the aerodynamically driven bending/flapping. The numerical solutions predict distribution of the degree of crystallinity in polymer jets in flight, as well as in the laydown formed on the collecting screen, with the three-dimensional structure of the laydown being fully reconstructed. The effect of the collector screen temperature, die-to-collector distance (DCD), and the activation energy of the viscous flow in the polymer melt on the laydown features is studied in detail. DA - 2019/12/6/ PY - 2019/12/6/ DO - 10.1021/acs.iecr.9b04840 VL - 59 IS - 1 SP - 399-412 J2 - Ind. Eng. Chem. Res. LA - en OP - SN - 0888-5885 1520-5045 UR - http://dx.doi.org/10.1021/acs.iecr.9b04840 DB - Crossref ER - TY - JOUR TI - Influence of demographics and motivational factors on US consumer clothing and shoes disposal behavior AU - Rezaei Arangdad, S. AU - Thoney-Barletta, K. AU - Joines, J. AU - Rothenberg, L. T2 - Research Journal of Textile and Apparel AB - Purpose The purpose of this paper is to study clothing and shoes disposal behavior of US consumers in an attempt to understand how to divert more clothing and shoes from the landfill. Design/methodology/approach A survey was administered to 209 consumers from the general US population. The survey includes questions on demographics, methods of disposal and factors that motivate or prevent consumers from choosing methods other than throwing unwanted clothing in the trash. Findings Analysis of demographic data from the survey indicates that gender, income, marital status, living arrangement and type of dwelling have an effect on whether consumers recycle textiles. Other survey results indicate that helping factors are more influential in motivating consumers to recycle clothing and shoes than economic factors. The condition of clothes and shoes and lack of awareness are the most prominent reasons preventing consumers from recycling more textiles. The results also show that there are statistically significant differences between households with and without children when it comes to disposing adults’ clothing and shoes. Originality/value These results may help policymakers who want to motivate consumers to recycle or develop recycling programs. DA - 2019/9/9/ PY - 2019/9/9/ DO - 10.1108/rjta-08-2018-0051 VL - 23 IS - 3 SP - 170–188 UR - http://dx.doi.org/10.1108/rjta-08-2018-0051 KW - Clothing disposal KW - Clothing recycling KW - Discard practices KW - Recycling behaviour KW - Textile waste ER - TY - JOUR TI - Washable, durable and flame retardant conductive textiles based on reduced graphene oxide modification AU - Zhao, Yintao AU - Wang, Jin AU - Li, Zengqing AU - Zhang, Xiangwu AU - Tian, Mingwei AU - Zhang, Xiansheng AU - Liu, Xuqing AU - Qu, Lijun AU - Zhu, Shifeng T2 - CELLULOSE AB - Graphene has been highlighted in a variety of wearable electronics and smart textiles applications due to its unique properties such as high conductivity, transparency, flexibility and other excellent mechanical performance. Although there have been extensive efforts for graphene based conductive fibers/yarns, there are remaining challenges in terms of the seamless integration between 2D flakes, and reduced charge transport in a lower carrier concentration. Unstable resistance probably arises from the creation of gaps in the conductive parts of the smart textile. Also, regional temperatures can get too high, constituting a fire-safety hazard and endangering the wearer's safety. In this work, the synergistic effect of graphene and flame-retardant materials was investigated, and a conductive fabric was developed which is highly conductive and flame retardancy. Graphene has excellent electrical and thermal conductivity and acts synergistically with traditional flame-retardants on common fabrics. The electrical surface resistivity of hybrid material modified fabrics was as low as 0.54 kΩ/sq, so they could serve as safe and highly conductive conductor in a simple circuit and show excellent wash-ability. The limiting oxygen index of the fabric increased from 19 to 32 after modification in conjunction with the residue at 800 °C increased from 17.9 to 31%, which could be used as safe and highly conductive materials for smart textiles and wearable devices. DA - 2019/// PY - 2019/// DO - 10.1007/s10570-019-02884-1 KW - Polyester KW - cotton fabric KW - Graphene oxide KW - Phosphate flame retardant KW - Electrical surface resistivity KW - Flame retardancy ER - TY - JOUR TI - Cohesion energy of thermally-bonded polyethylene terephthalate nonwovens: Experiments and theory AU - Zhang, Wenshuo AU - Yarin, Alexander L. AU - Pourdeyhimi, Behnam T2 - Polymer Testing AB - The present work aims at the experimental and theoretical investigation of the cohesion energy which can be achieved in the thermal calendar bonding of polymer nonwovens. Polyethylene terephthalate (PET) samples were used in the experiments. Tensile tests were conducted with the as-received PET nonwovens and thermally-bonded PET nonwovens. Thermal bonding was conducted under five temperatures: 160 °C, 170 °C, 180 °C, 190 °C, or 200 °C. The mechanical properties, Young's modulus, the yield stress, the maximum stress before sample failure and the toughness were measured. Blister tests were conducted aimed at measuring the cohesion energy of thermally-bonded PET nonwovens. The pushing shaft velocities of 2 mm/min and 10 mm/min were selected in the blister test. In addition, the theoretical description of the calendar bonding in the nip and of the forces acting on a nonwoven beyond the calendar nip is given. It is used to theoretically evaluate the cohesion energy of nonwovens due to thermal bonding in the nip. The predicted cohesion energy was estimated to be of the order of 4.2 J/m2, which is plausible for the experimental data corresponding to the lowest bonding temperature of 160 °C. On the other hand, at the higher bonding temperatures the experimentally measured cohesion energy was of the order of 10 J/m2, which can probably be attributed to the enhanced reptational entanglement at the elevated temperatures. DA - 2019/9// PY - 2019/9// DO - 10.1016/j.polymertesting.2019.105984 VL - 78 SP - 105984 J2 - Polymer Testing LA - en OP - SN - 0142-9418 UR - http://dx.doi.org/10.1016/j.polymertesting.2019.105984 DB - Crossref KW - Cohesion energy KW - Thermal calendar bonding KW - Blister test KW - Nonwovens ER - TY - JOUR TI - Nonwovens-Structure-process-property relationships AU - Pourdeyhimi, Behnam AU - Maze, Benoit AU - Farukh, Farukh AU - Silberschmidt, Vadim V. T2 - STRUCTURE AND MECHANICS OF TEXTILE FIBRE ASSEMBLIES, 2ND EDITION AB - The definition of nonwovens is even more complicated. The term nonwoven refers to web-like assemblages of fibers wherein fiber-to-fiber bonding replaces twisting and interlacing. We define a nonwoven as an engineered fabric structure that may contain fibrous and nonfibrous elements and that is often manufactured directly from fibers or filaments and may incorporate other types of fabrics. The difference primarily between a nonwoven and its more traditional counterparts (woven, knitted, and braided structures) is the structure. The fibers or filaments in a nonwoven are not interlaced or interlooped and are somewhat random layered assemblies of fibers held together by a variety of different means. The structure of a nonwoven is defined, therefore, as its fiber orientation distribution function (ODF). Another structural aspect important to consider is the basis weight (mass per unit area—g/m2 or more commonly referred to as gsm) and its uniformity. While ODF may dictate behavior, basis weight uniformity dictates failure. The structure-property relationships in a nonwoven cannot be decoupled from the process utilized to form the nonwoven. Therefore, below, we present a short review of the processes employed in the making of nonwovens followed by a discussion of the structure-process-property relationships and will make an attempt to describe the mechanical properties of one class of nonwovens. DA - 2019/// PY - 2019/// DO - 10.1016/B978-0-08-102619-9.00004-3 SP - 109-143 ER - TY - JOUR TI - Hydroentangled polymer nonwovens: Prediction of jet streaks and surface roughness AU - Li, Gen AU - Sankaran, Abhilash AU - Yarin, Alexander L. AU - Pourdeyhimi, Behnam T2 - POLYMER AB - Here, the dynamic model of polymer fibers in hydroentanglement is used to predict the appearance of the so-called jet streaks and surface roughness. The mechanism of formation of jet streaks is explained. It is shown that the staggered two-row water jets which are widely used in industry help to optimize surface roughness and reduce the jet streaks. It is also shown that the jet width ratio plays an important role in minimizing the surface roughness at different jet pressures. Furthermore, a novel numerical method of re-construction of the 3-D surface topography from discrete data is developed to visualize the jet streaks. Also, in the experiments of this work, the optical images of jet streaks on hydroentangled polymer nonwovens are analyzed. The streaks period is measured by using the Fast Fourier Transform (FFT) and the surface topography is visualized by using optical profilometer. The predicted optimal jet width ratio is compared to the experimental results and a good agreement is found. DA - 2019/10/10/ PY - 2019/10/10/ DO - 10.1016/j.polymer.2019.121731 VL - 180 SP - SN - 1873-2291 KW - Hydroentangled polymer nonwovens KW - Jet streaks KW - Roughness ER - TY - JOUR TI - Easy-to-use correlations to estimate droplet mobility on hydrophobic fibrous coatings AU - Jamali, M. AU - Tafreshi, H. Vahedi AU - Pourdeyhimi, B. T2 - COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS AB - While a water droplet beads up on a hydrophobic fibrous surface, it does not necessarily detach or move on the surface under its own weight. The underlying physics of droplet adhesion to a rough surface is very complicated, and the ability to engineer a fibrous texture that promotes or prevents droplet mobility for droplets of different liquids has been a long-standing challenge. In this concern, the current work is devised to develop easy-to-use correlations for the force needed to detach a droplet from a hydrophobic fibrous coating in the in-plane and out-of-plane directions. These correlations are obtained by first writing an equation for the balance of forces acting on a detaching droplet in terms of its geometrical dimensions at the moment of detachment, and then relating these dimensions to those in the absence of an external force via curve fitting to a series of computational data. These easy-to-use correlations only require the physical properties of the fibrous coatings (e.g., fiber diameter, fiber spacing, and fiber contact angle) and the droplets (e.g., volume and surface tension) as inputs, and they can therefore be used to optimize the surface geometry prior to manufacturing. To examine their accuracy, predictions of these correlations are compared to experimental data obtained for droplet detachment from fibrous mats with fibers having a diameter of about two orders of magnitude smaller than those considered in developing the correlations. DA - 2019/12/5/ PY - 2019/12/5/ DO - 10.1016/j.colsurfa.2019.123867 VL - 582 SP - SN - 1873-4359 KW - Droplet mobility KW - Electrospun polystyrene KW - Hydrophobic surface KW - Fibrous surface KW - Simulation KW - Ferrofluid droplet ER - TY - JOUR TI - Binding Conductive Ink Initiatively and Strongly: Transparent and Thermally Stable Cellulose Nanopaper as a Promising Substrate for Flexible Electronics T2 - ACS Applied Materials & Interfaces AB - For flexible electronics, the substrates play key roles in ensuring their performance. However, most substrates suffer from weak bonding with the conductive ink and need additional aids. Here, inspired by the Ag–S bond theory, a novel cellulose nanopaper substrate is presented to improve the bond strength with the Ag nanoparticle ink through a facile printing method. The substrate is fabricated using thiol-modified nanofibrillated cellulose and exhibits excellent optical properties (∼85%@550 nm), ultra-small surface roughness (3.47 nm), and high thermal dimensional stability (up to at least 90 °C). Most importantly, it can attract Ag nanoparticles initiatively and bind them firmly, which enable the conductive ink to be printed without using the ink binder and form a strong substrate–ink bonding and maintain a stable conductivity of 2 × 10–4 Ω cm even after extensive peeling and bending. This work may lead to exploring new opportunities to fabricate high-performance flexible electronics using the newly developed nanopaper substrate. DA - 2019/// PY - 2019/// DO - 10.1021/ACSAMI.9B04596 UR - https://publons.com/publon/14480246/ KW - Ag-S bond KW - silver nanoparticles KW - nanofibrillated cellulose KW - nanopaper KW - flexible electronics ER - TY - JOUR TI - Microfiber Nonwovens as Potential Membranes AU - Kiyak, Yasar AU - Maze, Benoit AU - Pourdeyhimi, Behnam T2 - SEPARATION AND PURIFICATION REVIEWS AB - This article provides an overview of the membrane bioreactor technology where nonwovens can be applied as an alternative medium for separation. The main objective is to identify the nonwoven characteristics leading to higher removal efficiency, higher flux, and lower fouling behavior. The general limitations associated with common nonwoven separation media are related to the large pore and wide pore size distributions. Consequently, due to their large pore network, nonwovens often behave as a depth filter structure. Common nonwovens having large fibers cannot replace microfiltration membranes yet. Further refinements of these structures are necessary for developing a suitable replacement. DA - 2019/// PY - 2019/// DO - 10.1080/15422119.2018.1479968 VL - 48 IS - 4 SP - 282–297 KW - Nonwoven KW - separation KW - filtration KW - fouling KW - membrane KW - wastewater treatment KW - biofouling ER - TY - JOUR TI - BODIPY-embedded electrospun materials in antimicrobial photodynamic inactivation AU - Stoll, Kevin R. AU - Scholle, Frank AU - Zhu, Jiadeng AU - Zhang, Xiangwu AU - Ghiladi, Reza A. T2 - PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES DA - 2019/8/1/ PY - 2019/8/1/ DO - 10.1039/c9pp00103d VL - 18 IS - 8 SP - 1923-1932 SN - 1474-9092 UR - https://publons.com/publon/26924633/ ER - TY - JOUR TI - AgNP/crystalline PANI/EBP-composite-based supercapacitor electrode with internal chemical interactions AU - Kim, Hyungjoo AU - Ramalingam, Manivannan AU - Balakumar, Vellaichamy AU - Zhang, Xiangwu AU - Gao, Wei AU - Son, Young-A AU - Bradford, Philip D. T2 - JOURNAL OF APPLIED POLYMER SCIENCE AB - ABSTRACT In this article, polyaniline (PANI) was conformally coated on epoxide‐functionalized buckypaper (EBP). Because of the presence of epoxide functional groups, chemical interactions occurred between oxygen in the epoxide groups and NH in the PANI. These chemical interactions were identified by peak shifts and intensity changes in Raman spectra. Additionally, crystalline peaks were clearly observed through X‐ray diffraction. However, Raman peak changes or crystalline peaks were not observed in nonfunctionalized buckypaper (purified pristine buckypaper [PPBP])‐based composites. Both hydrogen bonding and crystalline nature of EBP‐PANI enhanced its electrical conductivity, producing a specific capacitance better than that of PPBP‐PANI. Finally, Ag nanoparticles (AgNPs) were applied to EBP‐PANI to further enhance its electrical conductivity. Owing to the presence of AgNPs and their interactions with the N in PANI, the specific capacitance of EBP‐PANI‐AgNP reached 915.62 F/g. These results emphasize the positive effect of chemical interactions and crystalline nature of EBP‐based composites on their electrochemical performance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48164. DA - 2019/11/20/ PY - 2019/11/20/ DO - 10.1002/app.48164 VL - 136 IS - 44 SP - SN - 1097-4628 UR - https://publons.com/publon/26924632/ ER - TY - JOUR TI - The role of staple fiber length on the performance of carded, hydroentangled nonwovens produced with polypropylene fibers AU - Tabor, Jordan AU - Wust, Carl AU - Pourdeyhimi, Behnam T2 - JOURNAL OF ENGINEERED FIBERS AND FABRICS AB - Carding is a common web-forming process used for staple fibers in the nonwovens industry. Staple fibers may be produced in many different lengths. However, the effect of staple fiber length on the nonwoven carding process and structure–property relationships of carded, hydroentangled nonwoven fabrics is not well understood. During this research, polypropylene fibers with lengths ranging from 2.54 to 15.24 cm were produced, carded, and bonded by hydroentangling. All fiber lengths used during this research were successfully carded. Fabrics were characterized via scanning electron microscopy analysis as well as basis weight, thickness, and solid volume fraction measurements. Fabric performance was evaluated with air permeability and burst strength testing. Data sets were statistically evaluated with one-way and two-way analysis of variance to determine whether fiber length significantly affected fabric structure and properties. In general, the fabrics’ solid volume fractions and burst strengths were not significantly affected by fiber length. However, air permeability of the samples did show significant change with fiber length. DA - 2019/8/21/ PY - 2019/8/21/ DO - 10.1177/1558925019870058 VL - 14 SP - SN - 1558-9250 KW - Carding KW - fiber length KW - polypropylene KW - hydroentangling KW - structure-property relationships ER - TY - JOUR TI - Flexible polyaniline-carbon nanofiber supercapacitor electrodes AU - Yanilmaz, Meltem AU - Dirican, Mahmut AU - Asiri, Abdullah M. AU - Zhang, Xiangwu T2 - JOURNAL OF ENERGY STORAGE AB - Flexible polyaniline-carbon nanofiber (PANI-CNF) composites were fabricated and evaluated for use as supercapacitor electrodes. Sol-gel and electrospinning techniques were employed to produce flexible carbon nanofibers and polyaniline coating was applied via in-situ chemical polymerization to further improve the electrochemical properties of the electrodes. The performance of flexible PANI-CNF electrodes was investigated in symmetric supercapacitor cells. Results showed that binder-free flexible PANI-CNF electrodes had high capacitance of 234 F/g and excellent cycling stability with capacitance retention of about 90% after 1000 cycles. Ragone plots were also presented and a high energy density of 32 Wh/kg at the power density of 500 W/kg was achieved for the flexible PANI-CNF electrode prepared with 12 h polymerization. In addition, mechanical tests demonstrated that free-standing PANI-CNF electrodes were durable and highly flexible. Therefore, combining sol-gel and electrospinning techniques is a facile and effective way to achieve flexible carbon nanofiber electrodes and this work provides a new approach for designing flexible electrodes with exceptional electrochemical performance, which is very promising for practical application in the energy storage field. DA - 2019/8// PY - 2019/8// DO - 10.1016/j.est.2019.100766 VL - 24 SP - SN - 2352-152X UR - https://publons.com/publon/22573151/ KW - Carbon nanofiber KW - Polyaniline KW - Composite KW - Electrode ER - TY - JOUR TI - Multifunctional High-Performance Electrocatalytic Properties of Nb2O5 Incorporated Carbon Nanofibers as Pt Support Catalyst AU - Shanmugapriya, Sathyanarayanan AU - Zhu, Pei AU - Yan, Chaoyi AU - Asiri, Abdullah M. AU - Zhang, Xiangwu AU - Selvan, Ramakrishnan Kalai T2 - ADVANCED MATERIALS INTERFACES AB - Abstract Designing an electrocatalyst by integrating multiple classes of materials is an effective strategy for reinforcing the electrode properties. This study demonstrates a facile electrospinning technique for functionalizing the carbon nanofibers (CNFs) with Nb 2 O 5 co‐catalyst as the support material for platinum nanoparticles. The resultant Nb CNF‐Pt electrode has a sensible Pt loading of 30 µg cm −2 and manifests high catalytic activity towards the oxygen reduction reaction (ORR), methanol oxidation reaction (MOR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER). The Nb CNF‐Pt outperforms the commercial 20 wt% Pt loaded carbon with high positive onset potential (0.99 V vs reversible hydrogen electrode (RHE)) and half‐wave potential (0.87 V vs RHE) during ORR. It also provides large electrochemical active surface area (94.19 m 2 g −1 ) and mass activity (783.34 mA mg −1 ) during MOR. Furthermore, the Nb CNF‐Pt electrode demands an extremely minimal overpotential of 37 and 325 mV and a Tafel slope of 38 and 81 mV dec −1 for HER and OER, respectively. The enhanced electrocatalytic activity of Nb CNF‐Pt is attributed to the strong metal–support interaction between Nb 2 O 5 and Pt, resulting in a uniform loading of Pt NPs with reduced particle size and agglomeration‐free distribution. DA - 2019/9/6/ PY - 2019/9/6/ DO - 10.1002/admi.201900565 VL - 6 IS - 17 SP - SN - 2196-7350 UR - https://publons.com/publon/22082964/ KW - carbon nanofibers KW - co-catalysts KW - niobium oxide KW - Pt catalyst supports ER - TY - JOUR TI - Empirical model to simulate morphology of electrospun polycaprolactone mats AU - Yousefi, S. H. AU - Tang, C. AU - Tafreshi, H. Vahedi AU - Pourdeyhimi, B. T2 - Journal of Applied Polymer Science AB - ABSTRACT This work is the first to report a study aimed at generating 3D virtual geometries that represent the microstructure of an electrospun fibrous mat comprised curly fibers. Polycaprolactone (PCL) mats are considered in our study as an example of such fibrous structures. We started with simulating the formation of PCL filaments and observed good agreement between the predicted and measured fiber diameters. In the absence of quantitative information about the shape of a curly PCL fiber, we treated these fibers as arrays of beads arranged on epitrochoid profiles. We then used the fiber deposition diameter and velocity in a mass‐spring‐damper (MSD) model to generate 3D fibrous geometries comprised hundreds of such curly fibers. The damping and spring constants in the MSD model were obtained through calibration with experimental data reported for single electrospun PCL nanofibers. The size of the epitrochoid‐like fibers was obtained empirically through matching the average thickness of the resulting mats with those measured experimentally. With the calibrated code, we studied the effects of electrospinning conditions on the porosity of PCL nanofiber mats. It was found that increasing the voltage or decreasing the needle‐to‐collector distance results in PCL mats with thicker fibers, and consequently, lower porosities. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48242. DA - 2019/7/13/ PY - 2019/7/13/ DO - 10.1002/app.48242 VL - 136 IS - 46 SP - 48242 J2 - J Appl Polym Sci LA - en OP - SN - 0021-8995 1097-4628 UR - http://dx.doi.org/10.1002/APP.48242 DB - Crossref KW - electrospinning KW - modeling KW - nanofibers KW - PCL ER - TY - JOUR TI - Quantification on Growing Mass of Solid Electrolyte Interphase and Deposited Mn(II) on the Silicon Anode of LiMn2O4 Full Lithium-Ion Cells AU - Chen, Haihui AU - Xu, Hanying AU - Zeng, Yingying AU - Ma, Tianyi AU - Wang, Wei AU - Liu, Limin AU - Wang, Fang AU - Zhang, Xiangwu AU - Qiu, Xinping T2 - ACS Applied Materials & Interfaces AB - Silicon is considered to be one of the most important high-energy density anode materials for next-generation lithium-ion batteries. A large number of experimental studies on silicon anode have achieved better results, and greatly promoted its practical application potentiality, but almost of them are only tested in metal lithium half batteries. There is still an unavoidable question for commercial applications: what is the performance of the full cell composed of a silicon anode and a manganese-based material cathode? In this paper, the growing solid electrolyte interphase (SEI) and deposited manganese ions of the silicon anode's surface of the spinel lithium manganese oxide LiMn2O4/silicon full cells are quantitatively studied during electrochemical cycling, and the SEI performances are tested by differential scanning calorimetry to find out the reason for the rapid decline of reversible capacity in the LiMn2O4/silicon system. The experimental results show that manganese ions can make SEI films rapidly grow on the silicon anode and make SEI films more brittle, which results in lower Coulombic efficiency and rapid decline in capacity of the silicon anode. DA - 2019/8/7/ PY - 2019/8/7/ DO - 10.1021/acsami.9b07400 VL - 11 IS - 31 SP - 27839-27845 UR - https://doi.org/10.1021/acsami.9b07400 KW - solid electrolyte interphase KW - quantification KW - Coulombic efficiency KW - lithium ion battery KW - full cell ER - TY - JOUR TI - CENTRIFUGAL SPINNING-HIGH RATE PRODUCTION OF NANOFIBERS AU - Chen, Chen AU - Dirican, Mahmut AU - Zhang, Xiangwu T2 - ELECTROSPINNING: NANOFABRICATION AND APPLICATIONS AB - Nanofibers have attracted tremendous attention due to their flexibility, large surface area, and ease of modification, and they have been widely utilized in different applications such as filtration, tissue engineering, drug delivery, protective clothing, energy storage, etc. At this writing, the most commonly used method to produce nanofibers is electrospinning. However, the utilization of a high-voltage setup and the low production rate have become barriers to its use in large scale. Centrifugal spinning is an efficient approach to producing nanofibers from various materials. During centrifugal spinning, the polymer solution or polymer melt is ejected out of the rotating spinning head, and when the centrifugal force overcomes the surface tension of the polymer liquid material, the polymer jet undergoes a stretching process and is eventually deposited on the collector, forming solidified nanofibers. This chapter gives an overview of the history, working mechanism, influential parameters, and various applications of the centrifugal spinning method. DA - 2019/// PY - 2019/// DO - 10.1016/B978-0-323-51270-1.00010-8 SP - 321-338 UR - https://publons.com/publon/26924630/ ER - TY - JOUR TI - Influence of sea polymer removal on sound absorption behavior of islands-in-the-sea spunbonded nonwovens AU - Suvari, Fatih AU - Ulcay, Yusuf AU - Pourdeyhimi, Behnam T2 - TEXTILE RESEARCH JOURNAL AB - This work presents the results of efforts focused on the development of relatively lightweight and fibrous acoustic webs. For this objective, nonwoven webs that contain bicomponent filaments with islands-in-the-sea cross sections were produced by spunbonding, which involves the extrusion of sea and island polymer melts through dies, cooling and attenuating the bicomponent filaments by high-velocity air streams. Nylon 6 and polyethylene were used as the island and sea polymers, respectively. Webs were hydroentangled with high-pressure water jets prior to the dissolving process to obtain fiber entanglement. Sea polymer was removed from the spunbonded nonwovens by using a reflux dissolution setup. Weight, thickness, air permeability, pore size and sound absorption coefficients of the nonwoven samples were measured before and after the sea polymer removal. Results demonstrated that sea polymer removal led to further bicomponent filament fibrillation, which affected sound absorption positively. The structure with the higher number of island fibers had better acoustical properties. Lightweight and fibrous acoustic nonwovens can be obtained with the method given in this study. DA - 2019/6// PY - 2019/6// DO - 10.1177/0040517518797332 VL - 89 IS - 12 SP - 2444-2455 SN - 1746-7748 KW - nonwoven KW - spunbond KW - sound absorption KW - acoustic KW - islands-in-the-sea ER - TY - JOUR TI - Penetration of liquid droplets into hydrophobic fibrous materials under enhanced gravity AU - Jamali, M. AU - Vahedi Tafreshi, H. AU - Pourdeyhimi, B. T2 - Journal of Applied Physics AB - In this paper, experimental and numerical simulations were devised to study and formulate the force required for forcing a droplet to penetrate into a thin nonwetting fibrous structure. Due to the complexity of the problem at hand, we considered only thin fibrous structures comprised of parallel or orthogonally layered fibers. The experiments were conducted using ferrofluid droplets placed on electrospun polystyrene fibrous coatings. A permanent magnet was used to apply a body force to the droplets from below, and the assembly was placed on a sensitive scale for measuring the applied force. Numerical simulations were conducted using the Surface Evolver finite element code validated through comparison with dedicated experimental results. We studied how the force needed to initiate droplet spontaneous penetration into a thin fibrous coating varies with varying the volume of the droplet or the geometric properties of the coating. Using a combination of simulation results and experimental observations, easy-to-use but approximate expressions were derived and used to predict the force required to initiate droplet spontaneous penetration into the above-mentioned fibrous material. These analytical expressions allow one to circumvent the need for running a numerical simulation for each and every droplet–coating combination of interest and thereby expand the application of our work to conditions different from those considered here. DA - 2019/4/14/ PY - 2019/4/14/ DO - 10.1063/1.5092227 VL - 125 IS - 14 SP - 145304 J2 - Journal of Applied Physics LA - en OP - SN - 0021-8979 1089-7550 UR - http://dx.doi.org/10.1063/1.5092227 DB - Crossref ER - TY - JOUR TI - Industrial-scale fabrication of an osteogenic and antibacterial PLA/silver-loaded calcium phosphate composite with significantly reduced cytotoxicity AU - Cai, Shaobo AU - Pourdeyhimi, Behnam AU - Loboa, Elizabeth G. T2 - JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS AB - Abstract In this study, we report an industrial‐scale fabrication method of a multifunctional polymer composite as a scaffold material for bone tissue engineering. This study successfully demonstrated the potential of applying industrial polymer processing technologies to produce specially functionalized tissue engineering scaffolds. With the inclusion of a newly synthesized multifunctional additive, silver‐doped‐calcium phosphate (silver‐CaP), the composite material exhibited excellent osteogenic inducibility of human adipose‐derived stem cells (hASC) and satisfactory antibacterial efficacy against Escherichia coli and Staphylococcus aureus . Also, relative to previously reported methods of direct loading silver particles into polymeric materials, our composite exhibited significantly reduced silver associated cytotoxicity. The enhanced biocompatibility could be a significant advantage for materials to be used for regenerative medicine applications where clinical safety is a major consideration. The impact of different silver loading methodologies on hASC’ osteogenic differentiation was also studied. Overall, the results of this study indicate a promising alternative approach to produce multifunctional scaffolds at industrial‐scale with higher throughput, lower cost, and enhanced reproducibility. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 900–910, 2019. DA - 2019/5// PY - 2019/5// DO - 10.1002/jbm.b.34185 VL - 107 IS - 4 SP - 900-910 SN - 1552-4981 KW - industrial-scale fabrication KW - multifunctional scaffold KW - osteogenic KW - antibacterial KW - reduced cytotoxicity ER - TY - JOUR TI - Advanced ZnSnS3@rGO Anode Material for Superior Sodium-Ion and Lithium-Ion Storage with Ultralong Cycle Life AU - Jia, Hao AU - Dirican, Mahmut AU - Sun, Na AU - Chen, Chen AU - Yan, Chaoyi AU - Zhu, Pei AU - Dong, Xia AU - Du, Zhuang AU - Cheng, Hui AU - Guo, Jiansheng AU - Zhang, Xiangwu T2 - CHEMELECTROCHEM AB - Abstract A novel and facile approach has been utilized to synthesize zinc tin sulfide@reduced graphene oxide (ZnSnS 3 @rGO) through aqueous reaction of Na 2 SnO 3 and Zn(CH 3 COO) 2 , combined with a subsequent solvothermal reaction and an annealing process. The as‐prepared ZnSnS 3 @rGO nanocomposite exhibited an excellent sodium‐ and lithium‐ion‐storage performance with large specific capacity, high rate capability, and ultralong cycle life. When used in Na‐ion cells, the ZnSnS 3 @rGO nanocomposite delivered a capacity of 472.2 mAh g −1 at 100 mA g −1 and retained a specific capacity of 401.2 mAh g −1 after 200 cycles. In Li‐ion cells, the ZnSnS 3 @rGO nanocomposite delivered a capacity of 959.2 mAh g −1 at a current density of 100 mA g −1 and maintained a specific capacity of 551.3 mAh g −1 at a high current density of 1 A g −1 upon 500 cycles. The electrochemical performance results reveal that the integration of uniformly dispersed metal elements and an interconnected carbon matrix could help release the stress of volumetric excursion and provide fast electron/ion transport, leading to a remarkable electrochemical performance. DA - 2019/2/15/ PY - 2019/2/15/ DO - 10.1002/celc.201801333 VL - 6 IS - 4 SP - 1183-1191 SN - 2196-0216 UR - https://publons.com/publon/26924629/ KW - anode KW - lithium-ion battery KW - reduced graphene oxide KW - sodium-ion battery KW - zinc tin sulfide ER - TY - JOUR TI - The role of staple fiber length on the performance of carded, hydroentangled nonwovens produced with splittable fibers AU - Tabors, Jordan AU - Wust, Carl AU - Pourdeyhimi, Behnam T2 - JOURNAL OF ENGINEERED FIBERS AND FABRICS AB - Carding is a common web-forming process used for staple fibers in the nonwovens industry. Carded webs can be produced with bicomponent staple fibers designed to split into fine fibers. Splittable bicomponent fibers offer benefits such as increased surface area, improved hand, decreased pore size, improved cover, and enhanced strength. Splittable bicomponent fibers within carded webs can be split and bonded utilizing high-pressure water jets during the hydroentangling process. Staple fibers may be produced in many different lengths. However, the effect of staple fiber length on the nonwoven carding process and structure–property relationships of carded, hydroentangled nonwoven fabrics composed of splittable bicomponent fibers is not well understood. During this research, polyester/polyethylene 16-segmented pie, bicomponent fibers with lengths ranging from 2.54 to 15.24 cm were produced, carded and bonded by hydroentangling. All fiber lengths used during this research were successfully carded, and no significant challenges were observed during carding. Fabric performance was evaluated with air permeability and burst strength testing. Data sets were statistically evaluated with one-way and two-way analysis of variance to determine whether fiber length significantly affected fabric structure and properties. In general, the solid volume fraction and air permeability of the samples were affected by fiber length. However, fiber length did not strongly affect the burst strength of hydroentangled fabrics. DA - 2019/// PY - 2019/// DO - 10.1177/1558925019832526 VL - 14 ER - TY - JOUR TI - Hybrid Carbon Nanotube Fabrics with Sacrificial Nanofibers for Flexible High Performance Lithium-Ion Battery Anodes AU - Yildiz, Ozkan AU - Dirican, Mahmut AU - Fang, Xiaomeng AU - Fu, Kun AU - Jia, Hao AU - Stano, Kelly AU - Zhang, Xiangwu AU - Bradford, Philip D. T2 - JOURNAL OF THE ELECTROCHEMICAL SOCIETY AB - Silicon is one of the most promising anode materials for lithium-ion batteries because of its highest known theoretical charge capacity (4,200 mAh g−1). However, it has found limited application in commercial batteries because of the significant volume change (up to 400%) of silicon during cycling, which results in pulverization and capacity fading. Here, we present a new method to develop a silicon - carbon nanotube (CNT) hybrid anode architecture using CNT-polymer nanofiber hybridization method. The anode material is produced by electrospinning PMMA-Si nanofibers onto aligned CNT sheets, which are drawn on a grounded, rotating take-up roller, and then subsequently decomposing the PMMA electrospun fibers at elevated temperature to create a uniform distribution of Si particles within the CNT sheets. The whole structure is then coated with pyrolytic carbon via chemical vapor deposition (CVD). The architecture provides sufficient space to accommodate the volume expansion of the Si nanoparticles. The CVD pyrolytic carbon coating helps to anchor the Si nanoparticles within CNT sheets and stabilize solid-electrolyte-interface (SEI) formation. The novel freestanding, binder free CNT-Si-C sheet hybrid exhibited improved performance in terms of excellent cycling capacity (1470 mAh g−1), high coulombic efficiency (98%), and good capacity retention of 88% after 150 cycles. DA - 2019/2/9/ PY - 2019/2/9/ DO - 10.1149/2.0821902jes VL - 166 IS - 4 SP - A473-A479 SN - 1945-7111 UR - https://publons.com/publon/26924627/ ER - TY - JOUR TI - Hydroentanglement of Polymer Nonwovens 2: Simulation of multiple polymer fibers and prediction of entanglement AU - Li, Gen AU - Staszel, Christopher AU - Yarin, Alexander L. AU - Pourdeyhimi, Behnam T2 - POLYMER AB - The dynamic model of polymer fibers in hydroentanglement process developed in Part 1 (G. Li, C. Staszel, A.L. Yarin, B. Pourdeyhimi. Hydroentanglement of Polymer Nonwovens. 1: Experimental and theoretical/numerical framework) is generalized here to simulate simultaneous evolution and entanglement of multiple fibers. The fiber-fiber entanglement morphologies are established and the number of entanglements predicted as a function of time. The results of the experiments of Part 1 are compared with the numerical predictions based on the present model. It is shown that the model can successfully be used to describe hydroentanglement of nonwovens. The thickness reduction and the increase in the number of entanglements are predicted for different velocities of water jets. DA - 2019/2/15/ PY - 2019/2/15/ DO - 10.1016/j.polymer.2018.11.004 VL - 164 SP - 205-216 SN - 1873-2291 ER - TY - JOUR TI - Hydroentanglement of polymer nonwovens. 1: Experimental and theoretical/numerical framework AU - Li, Gen AU - Staszel, Christopher AU - Yarin, Alexander L. AU - Pourdeyhimi, Behnam T2 - POLYMER AB - Hydroentanglement is a versatile and important process used to form highly entangled nonwoven materials comprised of polymer fibers. It is a key element of polymer processing in the world, with the nonwovens market worth of tens of billions of the US dollars. No fundamental theoretical models of hydroentanglement were available so far, even though such modeling is required to facilitate the entirely empirical efforts to optimize the process. No model experiments on hydroentanglement aiming at its underlying physics were conducted either. These challenging problems are in focus in the present work. A model experiment is conducted and a quasi-one-dimensional model of individual polymer fibers is proposed and implemented for a number of fibers subjected to water jets impacting as a curtain normally to the nonwoven surface and undergoing filtration motion in the inter-fiber pores. The nonwoven is assumed to be located on a moving substrate with water suction through it. The model allows for a number of two-dimensional water jets and a number of suction ports in the substrate. The quasi-one-dimensional model allows for the three-dimensional motion of individual viscoelastic polymer fibers and the fiber-fiber interaction, which makes them non-self-intersecting. Then, the governing quasi-one-dimensional equations of fiber motion are discretized and solved numerically by using a discrete element method with mesh refinement of the Lagrangian mesh during the time marching. Using the developed code, several basic model problems were solved. Specifically, the behavior of several viscoelastic polymer fibers under the action of water jets with and without fiber-fiber interaction is described. Accordingly, a quantitative measure of the fiber-fiber entanglement is introduced based on the observed morphologies in the accompanying second part of this work. DA - 2019/2/15/ PY - 2019/2/15/ DO - 10.1016/j.polymer.2018.11.059 VL - 164 SP - 191-204 SN - 1873-2291 ER - TY - JOUR TI - Characterizing nonwoven materials via realistic microstructural modeling AU - Moghadam, A. AU - Yousefi, S. H. AU - Tafreshi, H. Vahedi AU - Pourdeyhimi, B. T2 - SEPARATION AND PURIFICATION TECHNOLOGY AB - A physics-based nonwoven structure generation model is presented in this work. The model is capable of incorporating the mechanical properties of the fibers in the simulations by treating each fiber as an array of beads connected to one another via springs and dampers. Our algorithm can realistically simulate the bending of the fibers at fiber–fiber crossovers or when external forces are applied to the fibers during fiber deposition process. In fact, a unique attribute of the modeling approach presented in this work is that it can be modified to emulate, to some extent, the manufacturing process by which the nonwoven media have been produced. Unlike most previous structure generation models, our mass-spring-damper algorithm does not require the thickness or porosity of the media to be fed to the model as an input, and it is also capable of avoiding fiber–fiber overlaps. For demonstration purposes, virtual media with bimodal fiber diameter or contact angle distributions were produced and used to estimate the pressure required for water to penetrate through a hydrophobic fibrous membrane, i.e., the so-called liquid entry pressure (LEP). The LEP calculations here are based on a simplifying assumption that the air–water interface remains intact across the width of the simulation domain as it travels throughout the media. Effects of fiber diameter(s), fiber orientations, or fiber contact angle(s) on LEP are simulated and discussed in detail. DA - 2019/3/18/ PY - 2019/3/18/ DO - 10.1016/j.seppur.2018.10.018 VL - 211 SP - 602-609 SN - 1873-3794 KW - Fibrous materials KW - Realistic modeling KW - Filter media simulation KW - Capillarity ER - TY - JOUR TI - Flexible electrolyte-cathode bilayer framework with stabilized interface for room-temperature all-solid-state lithium-sulfur batteries AU - Zhu, Pei AU - Yan, Chaoyi AU - Zhu, Jiadeng AU - Zang, Jun AU - Jia, Hao AU - Dong, Xia AU - Du, Zhuang AU - Zhang, Chunming AU - Wu, Nianqiang AU - Dirican, Mahmut AU - Zhang, Xiangwu AU - Li, Ya T2 - ENERGY STORAGE MATERIALS AB - Lithium-sulfur batteries (LSBs) are promising next-generation energy storage system beyond state-of-the-art lithium-ion batteries because of their low cost and high energy density. However, liquid electrolyte-based LSBs suffer from “polysulfide shuttle”, and safety concerns originated from the use of flammable organic electrolytes and the formation of lithium dendrites. Herein, we report a novel bilayer framework through integrating a three-dimensional (3D) carbon nanofiber/sulfur (CNF/S) cathode with one-dimensional (1D) ceramic Li0.33La0.557TiO3 (LLTO) nanofiber-poly(ethylene oxide) (PEO) solid composite electrolyte to serve as both cathode and electrolyte for room-temperature ASSLSBs. The stabilized cycling performance of this novel bilayer structure design lies in the reduced interfacial resistance and enhanced electrode/electrolyte interfacial stability due to the addition of Li+ conducting 1D LLTO nanofibers, as well as the formed fast-continuous electron/ion transportation pathways within the 3D cathode architecture. Meanwhile, the mechanically robust bilayer framework with micro-/meso-pores could also accommodate the large volume change of sulfur during continuous charge-discharge process and help suppress the Li dendrite formation. As a result of the aforementioned benefits of the novel bilayer structure design, the introduced ASSLSBs could deliver a stable cycling performance at room temperature with high Coulombic efficiency of over 99%. DA - 2019/2// PY - 2019/2// DO - 10.1016/j.ensm.2018.11.009 VL - 17 SP - 220-225 SN - 2405-8297 UR - https://publons.com/publon/9539991/ KW - Composite solid electrolyte KW - All-solid-state batteries KW - Lithium-sulfur batteries KW - Lithium dendrite KW - Room temperature ER - TY - JOUR TI - SnS hollow nanofibers as anode materials for sodium-ion batteries with high capacity and ultra-long cycling stability AU - Jia, Hao AU - Dirican, Mahmut AU - Sun, Na AU - Chen, Chen AU - Zhu, Pei AU - Yan, Chaoyi AU - Dong, Xia AU - Du, Zhuang AU - Guo, Jiansheng AU - Karaduman, Yekta AU - Wang, Jiasheng AU - Tang, Fangcheng AU - Tao, Jinsong AU - Zhang, Xiangwu T2 - CHEMICAL COMMUNICATIONS AB - In this study, a novel anode material of SnS hollow nanofibers (SnS HNFs) was rationally synthesized by a facile process and demonstrated to be a promising anode candidate for sodium-ion batteries. The synergetic effect of unique hollow and porous microstructures of SnS HNFs led to high capacity and ultra-long cycling stability. DA - 2019/1/14/ PY - 2019/1/14/ DO - 10.1039/c8cc07332e VL - 55 IS - 4 SP - 505-508 SN - 1364-548X UR - https://publons.com/publon/2973443/ ER - TY - JOUR TI - Hydrothermally synthesised NiCoP nanostructures and electrospun N-doped carbon nanofiber as multifunctional potential electrode for hybrid water electrolyser and supercapatteries AU - Surendran, Subramani AU - Shanmugapriya, Sathyanarayanan AU - Zhu, Pei AU - Yan, Chaoyi AU - Vignesh, Ramasamy Hari AU - Lee, Yun Sung AU - Zhang, Xiangwu AU - Selvan, Ramakrishnan Kalai T2 - ELECTROCHIMICA ACTA AB - In this work, a facile single-step hydrothermal technique is used to prepare a spherically concomitant foamy NiCoP as positrode for supercapatteries. Similarly, the nitrogen-doped carbon nanofibers are prepared by simple electrospinning technique to use as negatrode. The prepared materials are raptly examined through primary studies for both energy conversion and storage applications. Fascinatingly, NiCoP electrode encourages oxygen evolution reaction, and the carbon nanofiber electrode emboldens hydrogen evolution reaction with the minimum overpotential of 257 mV and 160 mV, respectively. In addition, a supercapattery is designed and operated at a full voltage window of 1.6 V using the fusion of carbon nanofiber as the negatrode and the cutting-edge NiCoP as the positrode, which presents a superior energy (56 Wh kg−1) and an improved power density (5333 W kg−1) with a long cyclic stability (5000 cycles). Finally, the fabricated supercapattery device is used to power the constructed hybrid water electrolyser that requisites a low cell voltage of 1.71 V to afford a current density of 10 mA cm−2. Overall, the prepared electrodes reveal its superiority of handling the multifunctional challenges for both water electrolyzer and supercapatteries. DA - 2019/2/10/ PY - 2019/2/10/ DO - 10.1016/j.electacta.2018.11.078 VL - 296 SP - 1083-1094 SN - 1873-3859 UR - https://publons.com/publon/21201014/ KW - Supercapattery KW - Water electrolyzer KW - Electrospinning KW - Phosphides KW - Carbon nanofiber ER - TY - JOUR TI - Carbon-enhanced centrifugally-spun SnSb/carbon microfiber composite as advanced anode material for sodium-ion battery AU - Jia, Hao AU - Dirican, Mahmut AU - Aksu, Cemile AU - Sun, Na AU - Chen, Chen AU - Zhu, Jiadeng AU - Zhu, Pei AU - Yan, Chaoyi AU - Li, Ya AU - Ge, Yeqian AU - Guo, Jiansheng AU - Zhang, Xiangwu T2 - JOURNAL OF COLLOID AND INTERFACE SCIENCE AB - Antimony tin (SnSb) based materials have become increasingly attractive as a potential anode material for sodium-ion batteries (SIBs) owing to their prominent merit of high capacity. However, cyclic stability and rate capability of SnSb anodes are currently hindered by their large volume change during repeated cycling, which results in severe capacity fading. Herein, we introduce carbon-coated centrifugally-spun [email protected] microfiber (CMF) composites as high-performance anodes for SIBs that can maintain their structural stability during repeated charge-discharge cycles. The centrifugal spinning method was performed to fabricate [email protected] due to its high speed, low cost, and large-scale fabrication features. More importantly, extra carbon coating by chemical vapor deposition (CVD) has been demonstrated as an effective method to improve the capacity retention and Coulombic efficiency of the [email protected] anode. Electrochemical test results indicated that the as-prepared [email protected]@C anode could deliver a large reversible capacity of 798 mA h∙g−1 at the 20th cycle as well as a high capacity retention of 86.8% and excellent Coulombic efficiency of 98.1% at the 100th cycle. It is, therefore, demonstrated that [email protected]@C composite is a promising anode material candidate for future high-performance SIBs. DA - 2019/2/15/ PY - 2019/2/15/ DO - 10.1016/j.jcis.2018.10.101 VL - 536 SP - 655-663 SN - 1095-7103 UR - https://publons.com/publon/26924626/ KW - Energy storage KW - Sodium-ion battery KW - Carbon microfibers KW - Antimony tin KW - Composite KW - Centrifugal spinning KW - CVD coating KW - Anode KW - Cycling stability KW - Capacity KW - Rate capability KW - Coulombic efficiency ER - TY - JOUR TI - Recent progress in polymer materials for advanced lithium-sulfur batteries AU - Zhu, Jiadeng AU - Zhu, Pei AU - Yan, Chaoyi AU - Dong, Xia AU - Zhang, Xiangwu T2 - Progress in Polymer Science AB - Polymers play essential roles in the research and development of rechargeable batteries, especially, lithium-sulfur (Li-S) batteries which have been considered as a promising candidate of the next-generation power supply mainly because of their high theoretical energy density (up to five-fold compared to state-of-the-art lithium-ion batteries). However, practical applications of Li-S batteries are mainly hindered by the insulating nature of sulfur and its intermediates, the polysulfide shuttle effect, and the formation and growth of lithium dendrites. Polymer materials play an important role in addressing these issues of Li-S batteries and their structures and functionalities can be manipulated to control the electrochemical performance of Li-S batteries (e.g., cylability, rate capability, lifespan, etc.). In this review, we concentrate on the recent development of various polymer materials for Li-S batteries. It starts with a brief introduction of the Li-S battery followed by its fundamental electrochemistry and challenges. Significant attention is then paid to the applications of various polymers in each component of Li-S batteries with a focus on the mechanisms behind their operation which are presented and further discussed from five perspectives: i) polymers in cathodes, ii) polymer electrolytes, iii) polymer interlayers, iv) polymer separators, and v) polymers for the lithium metal anode protection. The aim is to present a detailed review of the critical aspects related to the functional polymers that can be used as important resources for researchers working in a diverse range of fields dealing with Li-S batteries. Finally, conclusions and perspectives are presented. DA - 2019/3// PY - 2019/3// DO - 10.1016/j.progpolymsci.2018.12.002 VL - 90 SP - 118-163 UR - https://doi.org/10.1016/j.progpolymsci.2018.12.002 KW - Polymers KW - Lithium-sulfur batteries KW - Cathodes KW - Electrolytes KW - Interlayers/separators KW - Lithium metal ER - TY - JOUR TI - Composite solid electrolytes for all-solid-state lithium batteries AU - Dirican, Mahmut AU - Yan, Chaoyi AU - Zhu, Pei AU - Zhang, Xiangwu T2 - Materials Science and Engineering: R: Reports AB - Compared to currently used liquid-electrolyte lithium batteries, all-solid-state lithium batteries are safer and possess longer cycle life and have less requirements on packaging and state-of-charge monitoring circuits. Among various types of solid electrolytes, composite solid electrolytes, which are composed of active or passive inorganic fillers and polymer matrices, have been considered as promising electrolyte candidates for all-solid-state lithium batteries. Incorporation of inorganic fillers into the polymer matrices has been demonstrated as an effective method to achieve high ionic conductivity and excellent interfacial contact with the electrodes. In this review article, we first summarize the historical development of composite solid electrolytes. Contribution of both inert inorganic fillers and active Li-ion conductors to the ionic conductivity, electrochemical stability, and mechanical properties of the composite solid electrolytes are elaborated. Possible mechanisms of conductivity enhancement by inorganic fillers are broadly discussed. Examples of different composite solid electrolyte design concepts, such as inorganic nanoparticle/polymer, inorganic nanofiber/polymer, and other inorganic/polymer composite solid electrolytes, are introduced and their advantages and disadvantages are discussed. Inorganic filler/polymer composite solid electrolytes studied for use in various Li battery systems including Li-ion, Li-sulfur, and Li-metal batteries are evaluated. Promising designs of composite solid electrolytes and cathode materials used in all-solid-state Li batteries are also introduced. Finally, future perspectives on current requirements of composite solid electrolyte technologies are highlighted. DA - 2019/4// PY - 2019/4// DO - 10.1016/j.mser.2018.10.004 VL - 136 SP - 27-46 UR - https://doi.org/10.1016/j.mser.2018.10.004 KW - All-solid-state lithium battery KW - Composite solid electrolyte KW - Inorganic filler KW - Ionic conductivity ER -