摘要
Silicon(Si) materials as anode materials for applications in lithium-ion batteries(LIBs) have received increasing attention.Among the Si materials,the electrochemical properties of SiOx-based(0<x≤2)composites are the most prominent.However,due to the cycling stability of SiOx being far from practical,there are some problems,such as Iow initial coulombic efficiency(ICE),obvious volume expansion and poor conductivity.Researchers in various countries have optimized the electrochemical properties of SiOx-based composites by means of pore formation,surface modification,and the choice of constituents.In this review,SiOx-based composites are classified into three categories based on the valency of Si(SiO2 composites,SiO composites and SiOx(0<x<2) composites).The synthesis,morphologies and electrochemical properties of the SiOx-based composites that are applied in LIB are discussed.Finally,the prope rties of several common SiOx-based composites are briefly compared and the challenges faced by SiOx-based composites are highlight.
基金
supported by the National Natural Science Foundation of China(NSFC,Nos.21671170,21673203, 21201010)
the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP)
Program for New Century Excellent Talents of the University in China(NCET,No.13-0645)
Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.XSJCX17-015)
the Priority Academic Program Development of Jiangsu Higher Education Institutions.
