无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (1): 46-55.doi: 10.19964/j.issn.1006-4990.2022-0098

• 锂资源开发与利用 • 上一篇    下一篇

氧化铝包覆锂离子电池正极材料的研究进展

徐前进1(),徐金钢2,田朋1,2(),刘坤吉1,高婷婷2,宁桂玲2   

  1. 1.江西宝弘纳米科技有限公司,江西 宜春 331208
    2.大连理工大学-宝弘科技 锂电新材料联合研究中心,大连理工大学,辽宁 大连 116024
  • 收稿日期:2022-03-04 出版日期:2023-01-10 发布日期:2023-01-17
  • 作者简介:徐前进(1978— ),男,硕士,主要从事无机粉体的开发与生产;E-mail:michael.xu@cremone.com
  • 基金资助:
    江西省技术创新引导类计划项目-科技合作专项(2021BDH81011);江西省主要学科与学术带头人培养项目-领军人才计划(20213BCJ22020)

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 Published:2023-01-10 Online:2023-01-17

摘要:

锂离子电池正极材料的性能是锂电池技术发展的瓶颈。近年来,为了提高锂离子电池正极材料的循环寿命、热稳定性和倍率性能等,三氧化二铝涂覆正极材料已经被广泛研究。所讨论的三氧化二铝涂层分为粗糙涂层、超薄涂层和厚涂层。简要论述了三氧化二铝表面涂层改善正极材料的作用,如氟化氢清除剂、物理保护屏障、提高锂离子扩散速率、提升正极材料的热稳定性能、与六氟磷酸锂(LiPF6)反应生成二氟磷酸锂(LiPO2F2)和抑制Jahn-Teller效应等。介绍表面改性的方法,包括浸渍法、沉淀法、干法包覆、溅射法和原子层沉积法等,以及其对锂离子电池正极材料钴酸锂(LiCoO2)、锰酸锂(LiMn2O4)、磷酸铁锂(LiFePO4)及三元材料(Li-Ni-Co-Mn-O)的影响。最后,展望了三氧化二铝表面包覆和原子层沉积技术的发展前景。

关键词: 氧化铝, 表面包覆, 正极材料, 锂离子电池

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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