@article{li_xu_yao_xue_yanilmaz_lee_zhang_2014, title={Coaxial electrospun Si/C-C core-shell composite nanofibers as binder-free anodes for lithium-ion batteries}, volume={258}, ISSN={["1872-7689"]}, url={https://publons.com/publon/11754002/}, DOI={10.1016/j.ssi.2014.02.003}, abstractNote={Si/C–C core–shell nanofiber structure was designed by dual nozzle coaxial electrospinning and subsequent carbonization. This core–shell nanofiber structure has Si/C composite as the core and carbon as the shell. Used as an anode in lithium-ion batteries, the carbon shell can help buffer the large volume expansion/contraction of the Si/C core during charge/discharge and restrain the capacity fading caused by the mechanical failure of the active material. Results showed that after 50 cycles, the discharge capacity of Si/C–C core–shell composite nanofibers was 63% higher than that of Si/C composite nanofibers and the capacity retention increased from 48.6 to 72.4%. It is, therefore, demonstrated that Si/C–C core–shell composite nanofibers are promising anode material with large reversible capacity and good cycling stability.}, journal={SOLID STATE IONICS}, author={Li, Ying and Xu, Guanjie and Yao, Yingfang and Xue, Leigang and Yanilmaz, Meltem and Lee, Hun and Zhang, Xiangwu}, year={2014}, month={May}, pages={67–73} }
 @article{li_hu_lu_zhang_xu_fu_li_chen_zhou_xia_et al._2014, title={One-dimensional SiOC/C composite nanofibers as binder-free anodes for lithium-ion batteries}, volume={254}, ISSN={["1873-2755"]}, url={https://publons.com/publon/11754003/}, DOI={10.1016/j.jpowsour.2013.12.044}, abstractNote={One-dimensional silicon oxycarbide (SiOC)/C composite nanofibers were fabricated by electrospinning and subsequent heat treatment. Introducing carbon matrix to SiOC anode material is an efficient way to accommodate the large volume changes during cycling and also increase the amount of free carbon, which is beneficial for improving the reversible capacity. These SiOC/C composite nanofibers form free-standing conductive membranes that can be used directly as battery electrodes without adding carbon black or polymer binder. Results show that after 80 cycles, the discharge capacity of SiOC/C composite nanofiber anodes is 70% higher than that of Si/C nanofiber anodes and more than 1.5 times larger than those of commercial anodes made from graphite. It is, therefore, demonstrated that one-dimensional SiOC/C nanofibers are promising anode material with large capacities and good cycling stability.}, journal={JOURNAL OF POWER SOURCES}, publisher={Elsevier BV}, author={Li, Ying and Hu, Yi and Lu, Yao and Zhang, Shu and Xu, Guanjie and Fu, Kun and Li, Shuli and Chen, Chen and Zhou, Lan and Xia, Xin and et al.}, year={2014}, month={May}, pages={33–38} }
 @article{lu_zhang_li_xue_xu_zhang_2014, title={Preparation and characterization of carbon-coated NaVPO4F as cathode material for rechargeable sodium-ion batteries}, volume={247}, ISSN={["1873-2755"]}, url={https://publons.com/publon/7178355/}, DOI={10.1016/j.jpowsour.2013.09.018}, abstractNote={Sodium vanadium fluorophosphate (NaVPO4F), a material candidate for sodium-ion battery cathodes, was synthesized via a high-temperature solid-state reaction approach. Different amounts of carbon coating were introduced in NaVPO4F to improve its electrochemical performance. The structure and morphology of the resultant cathode materials were examined by scanning electron microscopy and X-ray diffraction. The effects of carbon coating on the electrochemical performance were evaluated by cyclic voltammetry, charge–discharge curve, cycling performance and electrochemical impedance spectroscopy. The highest capacity achieved for this material was 97.8 mAh g−1 and the best capacity retention was 89% at the 20th cycle. Results demonstrated that appropriate amount of carbon coating could effectively improve the electrochemical performance of NaVPO4F, and carbon-coated NaVPO4F could offer promising future for sodium-ion battery cathode materials.}, journal={JOURNAL OF POWER SOURCES}, author={Lu, Yao and Zhang, Shu and Li, Ying and Xue, Leigang and Xu, Guanjie and Zhang, Xiangwu}, year={2014}, month={Feb}, pages={770–777} }
 @article{lee_alcoutlabi_toprakci_xu_watson_zhang_2014, title={Preparation and characterization of electrospun nanofiber-coated membrane separators for lithium-ion batteries}, volume={18}, ISSN={["1433-0768"]}, url={https://publons.com/publon/674382/}, DOI={10.1007/s10008-014-2501-4}, number={9}, journal={JOURNAL OF SOLID STATE ELECTROCHEMISTRY}, publisher={Springer Nature}, author={Lee, Hun and Alcoutlabi, Mataz and Toprakci, Ozan and Xu, Guanjie and Watson, Jill V. and Zhang, Xiangwu}, year={2014}, month={Sep}, pages={2451–2458} }
 @article{li_sun_xu_lu_zhang_xue_jur_zhang_2014, title={Tuning electrochemical performance of Si-based anodes for lithium-ion batteries by employing atomic layer deposition alumina coating}, volume={2}, ISSN={["2050-7496"]}, url={https://publons.com/publon/11754001/}, DOI={10.1039/c4ta01562b}, abstractNote={A free-standing, conductive and three-dimensional network of Al2O3-coated Si/C composite nanofibers is fabricated by a single-nozzle electrospinning and atomic layer deposition. The as-obtained Al2O3-coated Si/C composite nanofibers exhibit excellent electrochemical performance for applications as anode materials for lithium-ion batteries.}, number={29}, journal={JOURNAL OF MATERIALS CHEMISTRY A}, publisher={Royal Society of Chemistry (RSC)}, author={Li, Ying and Sun, Yujie and Xu, Guanjie and Lu, Yao and Zhang, Shu and Xue, Leigang and Jur, Jesse S. and Zhang, Xiangwu}, year={2014}, pages={11417–11425} }
 @article{xue_xu_li_li_fu_shi_zhang_2013, title={Carbon-Coated Si Nanoparticles Dispersed in Carbon Nanotube Networks As Anode Material for Lithium-Ion Batteries}, volume={5}, ISSN={["1944-8252"]}, url={https://publons.com/publon/1792840/}, DOI={10.1021/am3027597}, abstractNote={Si has the highest theoretical capacity among all known anode materials, but it suffers from the dramatic volume change upon repeated lithiation and delithiation processes. To overcome the severe volume changes, Si nanoparticles were first coated with a polymer-driven carbon layer, and then dispersed in a CNT network. In this unique structure, the carbon layer can improve electric conductivity and buffer the severe volume change, whereas the tangled CNT network is expected to provide additional mechanical strength to maintain the integrity of electrodes, stabilize the electric conductive network for active Si, and eventually lead to better cycling performance. Electrochemical test result indicates the carbon-coated Si nanoparticles dispersed in CNT networks show capacity retention of 70% after 40 cycles, which is much better than the carbon-coated Si nanoparticles without CNTs.}, number={1}, journal={ACS APPLIED MATERIALS & INTERFACES}, author={Xue, Leigang and Xu, Guanjie and Li, Ying and Li, Shuli and Fu, Kun and Shi, Quan and Zhang, Xiangwu}, year={2013}, month={Jan}, pages={21–25} }
 @inproceedings{li_fu_xue_toprakci_li_zhang_xu_lu_zhang_2013, title={Co3O4/carbon composite nanofibers for use as anode material in advanced lithium-ion batteries}, volume={1140}, url={https://publons.com/publon/7178343/}, DOI={10.1021/bk-2013-1140.ch003}, abstractNote={Co3O4/carbon composite nanofibers were prepared by a combination of electrospinning and carbonization methods using 10 - 30 nm and 30 - 50 nm Co3O4 nanoparticles, respectively, and their potential use as the anode material in rechargeable lithium-ion batteries was investigated. The composite Co3O4/carbon nanofiber electrode containing 30 - 50 nm Co3O4 nanoparticles showed large reversible capacities and good cycleability with charge capacities of 677 and 545 mAh g-1 at the second and twentieth cycles, respectively. In contrast, the composite Co3O4/carbon nanofiber electrode containing 10 - 30 nm Co3O4 nanoparticles showed fast capacity fading during cycling due to severe nanoparticle aggregation. Results suggested that the good electrochemical performance of Co3O4/carbon nanofiber electrode containing 30 - 50 nm Co3O4 nanoparticles was ascribed to the combination of the properties of both Co3O4 nanoparticles (large Li storage capability) and carbon nanofiber matrix (long cycle life), and therefore this electrode material could be potentially used in high-energy rechargeable lithium-ion batteries.}, booktitle={Nanotechnology for sustainable energy}, author={Li, S. L. and Fu, K. and Xue, L. G. and Toprakci, O. and Li, Y. and Zhang, S. and Xu, G. J. and Lu, Y. and Zhang, Xiangwu}, year={2013}, pages={55–66} }
 @article{fu_xue_yildiz_li_lee_li_xu_zhou_bradford_zhang_et al._2013, title={Effect of CVD carbon coatings on Si@CNF composite as anode for lithium-ion batteries}, volume={2}, ISSN={["2211-3282"]}, url={https://publons.com/publon/7178363/}, DOI={10.1016/j.nanoen.2013.03.019}, abstractNote={Lithium-ion battery (LIB) anodes with high capacity and binder free structure were synthesized from carbon nanofibers that contained silicon nanoparticles (Si@CNF). The particle filled nonwoven structures were produced by an electrospinning and subsequent carbonization process. Pristine Si@CNF composites had Si nanoparticles exposed on the fiber surface. As produced, the Si nanoparticles could become detached from the nanofiber surface during cycling, causing severe structural damage and capacity loss. In order to prevent Si from detaching from the nanofiber surface, the Si@CNF composite was then treated with a thermal chemical vapor deposition (CVD) technique to make Si completely coated with a carbon matrix. The carbon coated Si@CNF (Si@CNF-C) composites were synthesized with different Si contents (10, 30, and 50 wt%) for different CVD treatment times (30, 60, and 90 min). It was found that the initial coulombic efficiency of Si@CNF-C could be increased via the amorphous carbon by stabilizing solid-electrolyte-interface (SEI) formation on surface. The capacity and cyclic stability were improved by the CVD carbon coating, especially for the 30 wt% Si@CNF-C composite with 90 min CVD coating, a CVD amorphous carbon coating of less than 1% by weight on Si@CNF composites contributed to more than 200% improvement in cycling performance. Results indicate that the CVD carbon coating is an effective approach to improve the electrochemical properties of Si@CNF composites making this a potential route to obtain high-energy density anode materials for LIBs.}, number={5}, journal={NANO ENERGY}, author={Fu, K. and Xue, L. G. and Yildiz, O. and Li, S. L. and Lee, H. and Li, Y. and Xu, G. J. and Zhou, L. and Bradford, P. D. and Zhang, Xiangwu and et al.}, year={2013}, month={Sep}, pages={976–986} }
 @article{li_xu_xue_zhang_yao_lu_toprakci_zhang_2013, title={Enhanced Rate Capability by Employing Carbon Nanotube-Loaded Electrospun Si/C Composite Nanofibers As Binder-Free Anodes}, volume={160}, ISSN={["1945-7111"]}, url={https://publons.com/publon/674380/}, DOI={10.1149/2.031304jes}, abstractNote={Si/C and Si/carbon nanotube (CNT)/C composite nanofibers were prepared by electrospinning and carbonization. The carbon nanofiber matrix can accommodate the volume change of Si nanoparticles and provide continuous pathways for efficient charge transport along the fiber axis. CNTs can improve the electronic conductivity and electrochemical performance of the composite nanofiber anodes. Results showed that many different types of connections between CNTs, Si nanoparticles and carbon matrix were formed. At a high current density of 300 mA g−1, after 30 cycles, the capacity of Si/CNT/C composite nanofiber anode was 44.3% higher than the anode without CNT and the C-rate performance of Si/CNT/C composite nanofiber anode was also superior to that of Si/C anode. It is, therefore, demonstrated that Si/CNT/C nanofibers are promising anode material with large capacities, good cycling stability, and good rate capability.}, number={3}, journal={JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, author={Li, Ying and Xu, Guanjie and Xue, Leigang and Zhang, Shu and Yao, Yingfang and Lu, Yao and Toprakci, Ozan and Zhang, Xiangwu}, year={2013}, pages={A528–A534} }
 @article{li_xu_yao_xue_zhang_lu_toprakci_zhang_2013, title={Improvement of cyclability of silicon-containing carbon nanofiber anodes for lithium-ion batteries by employing succinic anhydride as an electrolyte additive}, volume={17}, ISSN={["1433-0768"]}, url={https://publons.com/publon/674383/}, DOI={10.1007/s10008-013-2005-7}, number={5}, journal={JOURNAL OF SOLID STATE ELECTROCHEMISTRY}, author={Li, Ying and Xu, Guanjie and Yao, Yingfang and Xue, Leigang and Zhang, Shu and Lu, Yao and Toprakci, Ozan and Zhang, Xiangwu}, year={2013}, month={May}, pages={1393–1399} }
 @article{lu_li_zhang_xu_fu_lee_zhang_2013, title={Parameter study and characterization for polyacrylonitrile nanofibers fabricated via centrifugal spinning process}, volume={49}, ISSN={["1873-1945"]}, url={https://publons.com/publon/7178360/}, DOI={10.1016/j.eurpolymj.2013.09.017}, abstractNote={Electrospinning is currently the most popular method for producing polymer nanofibers. However, the low production rate and safety concern limit the practical use of electrospinning as a cost-effective nanofiber fabrication approach. Herein, we present a novel and simple centrifugal spinning technology that extrudes nanofibers from polymer solutions by using a high-speed rotary and perforated spinneret. Polyacrylonitrile (PAN) nanofibers were prepared by selectively varying parameters that can affect solution intrinsic properties and operational conditions. The resultant PAN nanofibers were characterized by SEM, and XRD. The correlation between fiber morphology and processing conditions was established. Results demonstrated that the fiber morphology can be easily manipulated by controlling the spinning parameters and the centrifugal spinning process is a facile approach for fabricating polymer nanofibers in a large-scale and low-cost fashion.}, number={12}, journal={EUROPEAN POLYMER JOURNAL}, author={Lu, Yao and Li, Ying and Zhang, Shu and Xu, Guanjie and Fu, Kun and Lee, Hun and Zhang, Xiangwu}, year={2013}, month={Dec}, pages={3834–3845} }
 @article{fu_xue_yildiz_li_lee_li_xu_zhou_bradford_zhang_et al._2013, title={Si/C composite nanofibers with stable electric conductive network for use as durable lithium-ion battery anode}, volume={2}, ISSN={["2211-3282"]}, url={https://publons.com/publon/674385/}, DOI={10.1016/j.nanoen.2012.11.001}, abstractNote={High-energy anode materials have attracted significant attention because of their potential applications in large-scale energy storage devices. However, they often suffer from rapid capacity fading due to the pulverization of the electrode and the breakdown of electric conductive network caused by the large volume changes of active material upon repeated lithium insertion and extraction. In this work, a new electrode composed of Si/C composite nanofibers was prepared, aiming at the improvement of cycling performance of Si anodes through the establishment of a stable electric conductive network for Si during cycling. By electrospinning, a three-dimensional network of carbon nanofibers, which possesses good elasticity to maintain the structure integrity and stable electric conductive network, is formed; by carbon coating, all Si nanoparticles are tightly bonded with carbon fibers to form a stable electric conductive pathway for electrode reactions. The nanofiber structure and the carbon coating on Si, combined with the binder, lead to a stable network structure that can accommodate the huge volume change of Si during the repeated volume expansion and contraction, thus resulting in excellent cycling performance.}, number={3}, journal={NANO ENERGY}, publisher={Elsevier BV}, author={Fu, Kun and Xue, Leigang and Yildiz, Ozkan and Li, Shuli and Lee, Hun and Li, Ying and Xu, Guanjie and Zhou, Lan and Bradford, Philip D. and Zhang, Xiangwu and et al.}, year={2013}, month={May}, pages={361–367} }
 @article{li_guo_ji_lin_xu_liang_zhang_toprakci_hu_alcoutlabi_et al._2013, title={Structure control and performance improvement of carbon nanofibers containing a dispersion of silicon nanoparticles for energy storage}, volume={51}, ISSN={["1873-3891"]}, url={https://publons.com/publon/674384/}, DOI={10.1016/j.carbon.2012.08.027}, abstractNote={Si/C composite nanofibers were prepared by electrospinning and carbonization using polyacrylonitrile (PAN) as the spinning medium and carbon precursor. The nanofibers were used as lithium-ion battery anodes to combine the advantages of carbon (long cycle life) and silicon (high storage capacity) materials. The effects of Si particle size, Si content, and carbonization temperature on the structure and electrochemical performance of the anodes were investigated. Results show that anodes made from a 15 wt.% Si/PAN precursor with a Si particle size of 30–50 nm and carbonization temperature of 800 °C exhibit the best performance in terms of high capacity and stable cycling behavior. It is demonstrated that with careful structure control, Si/C composite nanofiber anodes are a promising material for next-generation lithium-ion batteries.}, journal={CARBON}, author={Li, Ying and Guo, Bingkun and Ji, Liwen and Lin, Zhan and Xu, Guanjie and Liang, Yinzheng and Zhang, Shu and Toprakci, Ozan and Hu, Yi and Alcoutlabi, Mataz and et al.}, year={2013}, month={Jan}, pages={185–194} }
 @article{toprakci_toprakci_ji_xu_lin_zhang_2012, title={Carbon Nanotube-Loaded Electrospun LiFePO4/Carbon Composite Nanofibers As Stable and Binder-Free Cathodes for Rechargeable Lithium-Ion Batteries}, volume={4}, ISSN={["1944-8252"]}, url={https://publons.com/publon/674388/}, DOI={10.1021/am201527r}, abstractNote={LiFePO(4)/CNT/C composite nanofibers were synthesized by using a combination of electrospinning and sol-gel techniques. Polyacrylonitrile (PAN) was used as the electrospinning media and carbon source. Functionalized CNTs were used to increase the conductivity of the composite. LiFePO(4) precursor materials, PAN and functionalized CNTs were dissolved or dispersed in N,N-dimethylformamide separately and they were mixed before electrospinning. LiFePO(4) precursor/CNT/PAN composite nanofibers were then heat-treated to obtain LiFePO(4)/CNT/C composite nanofibers. Fourier transform infrared spectroscopy measurements were done to demonstrate the functionalization of CNTs. The structure of LiFePO(4)/CNT/C composite nanofibers was determined by X-ray diffraction analysis. The surface morphology and microstructure of LiFePO(4)/CNT/C composite nanofibers were characterized using scanning electron microscopy and transmission electron microscopy. Electrochemical performance of LiFePO(4)/CNT/C composite nanofibers was evaluated in coin-type cells. Functionalized CNTs were found to be well-dispersed in the carbonaceous matrix and increased the electrochemical performance of the composite nanofibers. As a result, cells using LiFePO(4)/CNT/C composite nanofibers have good performance, in terms of large capacity, extended cycle life, and good rate capability.}, number={3}, journal={ACS APPLIED MATERIALS & INTERFACES}, author={Toprakci, Ozan and Toprakci, Hatice A. K. and Ji, Liwen and Xu, Guanjie and Lin, Zhan and Zhang, Xiangwu}, year={2012}, month={Mar}, pages={1273–1280} }
 @article{li_lin_xu_yao_zhang_toprakci_alcoutlabi_zhang_2012, title={Electrochemical Performance of Carbon Nanofibers Containing an Enhanced Dispersion of Silicon Nanoparticles for Lithium-Ion Batteries by Employing Surfactants}, volume={1}, ISSN={["2162-8734"]}, url={https://publons.com/publon/674390/}, DOI={10.1149/2.002202eel}, abstractNote={Si/C composite nanofibers were prepared by electrospinning and carbonization. Two surfactants: cetyl trimethyl ammonium bromide (CTAB) and sodium dodecanoate (SD), were used to improve the dispersion of Si nanoparticles and the electrochemical performance. Results show that after 50 cycles, the discharge capacity of Si/C nanofibers does not have significant change after the addition of CTAB surfactant, however, the discharge capacity of Si/C nanofibers with SD surfactant is more than 20% higher than that without surfactant. It is demonstrated that employing SD surfactant is a simple and effective way to obtain Si/C nanofibers with large capacities and good cycling stability.}, number={2}, journal={ECS ELECTROCHEMISTRY LETTERS}, author={Li, Ying and Lin, Zhan and Xu, Guanjie and Yao, Yingfang and Zhang, Shu and Toprakci, Ozan and Alcoutlabi, Mataz and Zhang, Xiangwu}, year={2012}, pages={A31–A33} }
 @article{ji_lin_alcoutlabi_toprakci_yao_xu_li_zhang_2012, title={Electrospun carbon nanofibers decorated with various amounts of electrochemically-inert nickel nanoparticles for use as high-performance energy storage materials}, volume={2}, ISSN={["2046-2069"]}, url={https://publons.com/publon/674391/}, DOI={10.1039/c1ra00676b}, abstractNote={Carbon nanofibers decorated with various amounts of electrochemically-inert metallic nickel nanoparticles are synthesized through electrospinning and carbonization processes. The morphology and composition of Ni nanoparticles in carbon nanofibers are controlled by preparing different nanofiber precursors. The lithium-ion battery performance evaluations indicated that the content of electrochemically-inert Ni nanoparticles in carbon nanofibers has a great influence on the final electrochemical performance. For example, at certain Ni contents, these composite nanofibers display excellent electrochemical performance, such as high reversible capacities, good capacity retention, and excellent rate performance, when directly used as binder-free anodes for rechargeable lithium-ion batteries. However, when the Ni content is too low or too high, the corresponding electrodes show low reversible capacities although they still have good reversibility and rate performance.}, number={1}, journal={RSC ADVANCES}, author={Ji, Liwen and Lin, Zhan and Alcoutlabi, Mataz and Toprakci, Ozan and Yao, Yingfang and Xu, Guanjie and Li, Shuli and Zhang, Xiangwu}, year={2012}, pages={192–198} }
 @article{liang_cheng_zhao_zhang_sun_zhou_qiu_zhang_2012, title={High-capacity Li2Mn0.8Fe0.2SiO4/carbon composite nanofiber cathodes for lithium-ion batteries}, volume={213}, ISSN={["1873-2755"]}, url={https://doi.org/10.1016%2Fj.jpowsour.2013.04.019}, DOI={10.1016/j.jpowsour.2012.04.011}, abstractNote={Li2MnSiO4 has been considered as a promising cathode material with an extremely high theoretically capacity of 332 mAh g−1. However, due to its low intrinsic conductivity and poor structural stability, only about half of the theoretical capacity has been realized in practice and the capacity decays rapidly during cycling. To realize the high capacity and improve the cycling performance, Li2Mn0.8Fe0.2SiO4/carbon composite nanofibers were prepared by the combination of iron doping and electrospinning. X-ray diffraction, scanning electron microscope, and transmission electronic microscope were applied to characterize the Li2Mn0.8Fe0.2SiO4/carbon nanofibers. It was found that Li2Mn0.8Fe0.2SiO4 nanoparticles were embedded into continuous carbon nanofiber matrices, which formed free-standing porous mats that could be used as binder-free cathodes. The iron doping improved the conductivity and purity of the active material, and the carbon nanofiber matrix facilitated ion transfer and charge diffusion. As a result, Li2Mn0.8Fe0.2SiO4/carbon nanofiber cathodes showed promising improvement on reversible capacity and cycling performance.}, journal={JOURNAL OF POWER SOURCES}, publisher={Elsevier BV}, author={Liang, Yinzheng and Cheng, Sichen and Zhao, Jianmeng and Zhang, Changhuan and Sun, Shiyuan and Zhou, Nanting and Qiu, Yiping and Zhang, Xiangwu}, year={2012}, month={Sep}, pages={10–15} }
 @article{zhang_lu_xu_li_zhang_2012, title={LiF/Fe/C nanofibres as a high-capacity cathode material for Li-ion batteries}, volume={45}, ISSN={["1361-6463"]}, url={https://publons.com/publon/7178351/}, DOI={10.1088/0022-3727/45/39/395301}, abstractNote={Abstract}, number={39}, journal={JOURNAL OF PHYSICS D-APPLIED PHYSICS}, author={Zhang, Shu and Lu, Yao and Xu, Guanjie and Li, Ying and Zhang, Xiangwu}, year={2012}, month={Oct} }