@article{dufficy_corder_dennis_fedkiw_khan_2021, title={Guar Gel Binders for Silicon Nanoparticle Anodes: Relating Binder Rheology to Electrode Performance}, volume={13}, ISSN={["1944-8252"]}, url={https://doi.org/10.1021/acsami.1c10776}, DOI={10.1021/acsami.1c10776}, abstractNote={Binding agents are a critical component of Si-based anodes for lithium-ion batteries. Herein, we introduce a composite hydrogel binder consisting of carbon black (CB) and guar, which is chemically cross-linked with glutaraldehyde as a means to reinforce the electrode structure during lithiation and improve electronic conductivity. Dynamic rheological measurements are used to monitor the cross-linking reaction and show that rheology plays a significant role in binder performance. The cross-linking reaction occurs at a faster rate and produces stronger networks in the presence of CB, as evidenced from higher gel elastic modulus in guar + CB gels than guar gels alone. Silicon nanoparticle (SiNP) electrodes that use binders with low cross-link densities (trxn < 2 days) demonstrate discharge capacities ∼1200 mAh g-1 and Coulombic efficiencies >99.8% after 300 cycles at 1-C rate. Low cross-link densities likely increase the capacity of SiNP anodes because of binder-Si hydrogen-bonding interactions that accommodate volume expansions. In addition, the cross-linked binder demonstrates the potential for self-healing, as evidenced by an increased elastic modulus after the gel was mechanically fragmented, which may preserve the electrode microstructure during lithiation and increase capacity retention. The composite hydrogel with integrated conductive additives gives promise to a new type of binder for next-generation lithium-ion batteries.}, number={43}, journal={ACS APPLIED MATERIALS & INTERFACES}, publisher={American Chemical Society (ACS)}, author={Dufficy, Martin K. and Corder, Ria D. and Dennis, Kimberly A. and Fedkiw, Peter S. and Khan, Saad A.}, year={2021}, month={Nov}, pages={51403–51413} }
 @article{dufficy_luo_fedkiw_maggard_2016, title={Vacancy-induced manganese vanadates and their potential application to Li-ion batteries}, volume={52}, ISSN={["1364-548X"]}, DOI={10.1039/c6cc02249a}, abstractNote={We report on the synthesis and characterization of a novel manganese vanadate, Mn1.5(H2O)(NH4)V4O12, with rare in situ disorder of Mn(H2O)22+/2NH4+.}, number={47}, journal={CHEMICAL COMMUNICATIONS}, author={Dufficy, Martin K. and Luo, Lan and Fedkiw, Peter S. and Maggard, Paul A.}, year={2016}, pages={7509–7512} }
 @article{dufficy_huang_khan_fedkiw, title={Effects of composition and structure on the performance of tin/graphene-containing carbon nanofibers for Li-ion anodes}, volume={7}, number={25}, journal={RSC Advances}, author={Dufficy, M. K. and Huang, S. Y. and Khan, S. A. and Fedkiw, P. S.}, pages={15428–15438} }
 @article{dufficy_geiger_bonino_khan, title={Electrospun ultrafine fiber composites containing fumed silica: From solution rheology to materials with tunable wetting}, volume={31}, number={45}, journal={Langmuir}, author={Dufficy, M. K. and Geiger, M. T. and Bonino, C. A. and Khan, S. A.}, pages={12455–12463} }
 @article{dufficy_khan_fedkiw, title={Galactomannan binding agents for silicon anodes in Li-ion batteries}, volume={3}, number={22}, journal={Journal of Materials Chemistry A}, author={Dufficy, M. K. and Khan, S. A. and Fedkiw, P. S.}, pages={12023–12030} }
 @article{dufficy_khan_fedkiw, title={Hierarchical graphene-containing carbon nanofibers for lithium-ion battery anodes}, volume={8}, number={2}, journal={ACS Applied Materials & Interfaces}, author={Dufficy, M. K. and Khan, S. A. and Fedkiw, P. S.}, pages={1327–1336} }