Communication—Self-Template Fabrication of Porous Si/SiOx/C Anode Material for Lithium-Ion Batteries

Abstract

Silicon suboxide (SiO x , 0 < x < 2) is considered as one of the most promising anode materials for lithium ion batteries (LIBs) due to its high specific capacity. However, the mechanical instability of SiO x during charge/discharge process easily leads to electrode pulverization and thus fast performance degradation. Herein, we report a facile self-template method to synthesize a porous Si/SiO x /C composite, in which interconnected Si/SiO x nanoparticles are coated by thin carbon layer. As anode material for LIBs, the highly porous Si/SiO x /C presents high electrochemical performance, especially the excellent rate capability.