Novel Silicon Anode Materials for Lithium Ion Batteries
Silicon is potentially an excellent anode material due to its high lithiation capacity and it is expected to emerge as a key element in the next generation high capacity lithium ion batteries. The prevention or minimization of mechanical deformation of the silicon anode material during the repeated charge-discharge cycles is a challenging problem. In our research, a novel catalytic process is developed to prepare silicon-carbon nanotube composite materials that are robust to mechanical deformation or breakdown during its service period. We investigate the kinetics of CNT growth on silicon surfaces to optimize the morphology and conformation of CNTs. Performance testing of the anode material is carried out in collaboration with Prof. Chunsheng Wang’s battery research group.