Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (11): 10-16.doi: 10.19964/j.issn.1006-4990.2020-0666

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on modification of solid inorganic electrolyte of Li7La3Zr2O12

LU Chao(),LI Mingming,WU Xiaoqiang,AN Xuguang,KONG Qingquan,WANG Xiaolian   

  1. School of Mechanical Engineering,Chengdu University,Chengdu 610106,China
  • Received:2020-12-09 Online:2021-11-10 Published:2021-11-15

Abstract:

As a solid inorganic electrolyte material,Li7La3Zr2O12 in cubic garnet phase has advantages of high lithium ion con-ductivity at room-temperature,wide electrochemical window and excellent thermal stability,which is the key to the commer-cial application of solid lithium ion batteries with high safety and high energy density.The crystal structure and lithium con-duction mechanism of Li7La3Zr2O12were described,and the recent advances in modification of phase structure stability,interfa-cial impedance and compatibility,sintering activity and ionic conductivity of Li7La3Zr2O12 by means of element doping,poly-mer electrolyte compounding,sintering additives introduction,surface coating or modification were reviewed.Finally,aiming at the obstacles and challenges in the industrial application of Li7La3Zr2O12,the countermeasures including development of new preparation process,multiple modification of ionic conductivity,and structure design and optimization of flexible compo-site electrolyte membrane were proposed, which could provide a basis for promoting the development of high-performance solid state lithium ion batteries.

Key words: Li7La3Zr2O12, lithium ion battery, solid state electrolyte, ion conductivity

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