Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (1): 46-55.doi: 10.19964/j.issn.1006-4990.2022-0098

• Development and utilization of lithium resources • Previous Articles     Next Articles

Research progress of alumina coated cathode materials for lithium-ion batteries

XU Qianjin1(),XU Jingang2,TIAN Peng1,2(),LIU Kunji1,GAO Tingting2,NING Guiling2   

  1. 1. Jiangxi Baohtech Science Co. ,Ltd. ,Yichun 331208,China
    2. Dalian University of technology-Baohong technology lithium battery new material joint research center,Dalian University of technology,Dalian 116024,China
  • Received:2022-03-04 Online:2023-01-10 Published:2023-01-17
  • Contact: TIAN Peng E-mail:michael.xu@cremone.com;tianpeng@dlut.edu.cn

Abstract:

The performance of lithium-ion battery cathode materials is the development bottleneck of lithium battery technology.Recently,alumina(Al2O3) coated cathode materials have been widely studied in order to improve the cycle life,thermal stability and multiplier properties of lithium-ion batteries.The Al2O3 coatings were divided into three different forms of namely rough,ultra-thin and thick coatings.The role of Al2O3 surface coatings in improving cathode material performance was briefly discussed,such as HF scavenger,physical protective barrier,increasing lithium ion diffusion rate,improving thermal stability of cathode material,reacting with LiPF6 to form electrolyte additive LiPO2F2 and inhibiting Jahn-Teller effect,etc.The surface modification methods were introduced,including impregnation method,precipitation method,dry coating process,sputtering method and atomic layer deposition method,etc.and its influence on the cathode materials of lithium cobaltite(LiCoO2),lithium manganite(LiMn2O4),lithium iron phosphate(LiFePO4) and ternary material(Li-Ni-Co-Mn-O).At last,the development trend of Al2O3 surface coating and atomic layer deposition technology was prospected.

Key words: alumina, surface coating, cathode material, lithium-ion battery

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