Design Strategies of Si/C Composite Anode for Lithium-Ion Batteries.

Abstract

Silicon-based materials that have higher theoretical specific capacity than other conventional anodes, such as carbon materials, Li 2 TiO 3 materials and Sn-based materials, becomes a hot topic in research of lithium-ion battery (LIB). However, the low conductivity and large volume expansion of silicon-based materials hinders the commercialization of silicon-based materials. Until recent years, these issues are alleviated by the combination of carbon based materials. In this review, the preparation of Si/C materials by different synthetic methods in the past decade is reviewed along with their respective advantages and disadvantages. In addition, the research progress of Si/C materials formed by silicon and different carbon based materials is researched, where the influences of carbons on the property modulation of silicon are emphasized. Lastly, future research direction in the material design and optimization of Si/C materials is proposed to fill the current gap in the development of efficient Si/C anode for LIBs.