Fabrication of Si/SiOx A no de Materials by a Solution Reaction-Based Method for Lithium Ion Batteries

Abstract

Si/SiOx composite anodes were prepared using a facile solution reaction-based method. Their initial capacity was significantly improved to 1.3 times that of SiOx by incorporating 3 wt% silicon nanoparticles into the SiOx. The capacity retention of the Si/SiOx anodes after 50 charge-discharge cycles was significantly enhanced, to 99%, compared with 8% retention for the pristine silicon anode. These improved results were achieved by combining the advantages of silicon, for high capacity, with SiOx, for cyclic stability. Our current results suggest that this simple solution reaction-based approach is a promising method for fabricating low cost Si/SiOx composite anode materials for lithium ion batteries, which exhibit high electrochemical performance, of more than 1000 mAh/g capacity, and cyclic stability.