In Situ Prepared High-Performance Graphene/Silicon/Carbon Composites as Anodes for Lithium-Ion Batteries

In this research, graphene/silicon/carbon composite anode materials were prepared in situ by atmospheric pressure chemical vapor deposition and simple thermal decomposition. The nanosilicon was deposited on the surface of graphene by using SiH₄ as a silicon source. Then, the method of pyrolyzing oil-based phenolic resin was used to coat the carbon layer on the silicon surface and agglomerate particles into spherical particles. The capacity retention at a 0.5 C cycle for 140 cycles (1 C = 0.96 A g^-1) remained at 810.05 mAh g^-1, compared to only 458.16 mAh g^-1 for the raw G/Si material.