Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (4): 349-357.doi: 10.15541/jim20180347

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Silicon-based Anode Materials Applied in High Specific Energy Lithium-ion Batteries: a Review

Yi TAN1,2,Kai WANG1,2   

  1. 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
    2. Key Laboratory for Solar Energy Photovoltaic System of Liaoning Province, Dalian 116024, China
  • Received:2018-07-25 Revised:2018-11-24 Online:2019-04-20 Published:2019-04-15

Abstract:

Silicon has the highest theoretical lithium insertion specific capacity, more than ten times the theoretical specific capacity of graphite electrode material, and low delithiation potential, with abundant resources and good rate characteristics, high-energy-density lithium-ion battery silicon-based materials have become hot spots in application fields such as electric vehicles and renewable energy storage systems. However, it will cause powdering and structural collapse of the silicon electrode material due to its large volume expansion effect in the process of delithiation and lithium insertion. In addition, the solid electrolyte interface (SEI) layer on the surface of silicon is repeatedly formed in the electrolyte, which increases the polarization and reduces the coulomb efficiency, eventually leading to deterioration of electrochemical performance. In order to solve the above problems and realize the commercial application of silicon electrodes. This paper systematically summarizes the work to solve the volume effect in charge and discharge process through the selection and structural design of silicon-based materials, and deeply analyzes and discusses the preparation methods, electrochemical properties and corresponding mechanisms of representative silicon-based composite materials, focusing on silicon-carbon composites and SiOx (0<x≤2) based anode materials. Finally, the problems of silicon-based anode materials are analyzed and their prospects are prospected.

Key words: silicon-based material, anode materials, lithium-ion batteries, review

CLC Number: 

  • TM912