(173b) Nano-Silicon/Graphene Composite Anode Modifications for Enhanced Performance Lithium Ion Batteries | AIChE

(173b) Nano-Silicon/Graphene Composite Anode Modifications for Enhanced Performance Lithium Ion Batteries

Authors 

De Guzman, R. J. - Presenter, Wayne State University
Yang, J. - Presenter, Wayne State University
Cheng, M. - Presenter, Wayne State University
Salley, S. - Presenter, Wayne State University
Simon Ng, K. Y. - Presenter, Wayne State University


Development of lithium ion batteries with improved capacity and cycle performance are in the forefront of efforts to increase the electrification of current-age vehicles. Lately, much attention has been focused in the use of silicon-based anode materials due to their low discharge potential and theoretical capacity (4,200 mAh/g) which is more than 10 fold of the traditional graphite anode. However, due to the increased accommodated lithium ions, silicon’s volume varies by 400% causing pulverization and loss of electrical contact. Due to this, strategies have led to the use of nano-sized Si and incorporation of Graphene to be able to mitigate volume variation and therefore produce a stable anode material with improved capacity and cyclability. This project is aimed at the improvement of the dispersion of Si nanoparticles and the optimization of the graphene nanostructure producing a Si nanoparticle/graphene nanosheet composite anode demonstrating improved capacity retention and rate performance.