合成条件对锂离子电池正极材料性能的影响  

Effect of Synthesis Conditions on The Properties of Cathode Materials for Lithium-Ion Batteries

作　　者：李航 王莉[2] 宋有志 张稚国 杜爱民[1] 何向明[2] Hang Li;Li Wang;Youzhi Song;Zhiguo Zhang;Aimin Du;Xiangming He(School of Automotive Studies,Tongji University,Shanghai 201804,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]同济大学汽车学院,上海201804 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《化学进展》2024年第9期1304-1315,共12页Progress in Chemistry

基　　金：国家自然科学基金项目(No.22279070,U21A20170,22279071,52206263);科技部重点研发计划(No.2019YFA0705703)资助。

摘　　要：层状过渡金属氧化物正极材料(LiTMO_(2))因其高理论比容量,是高比能量锂离子电池广泛应用的一类正极材料。然而,LiTMO_(2)在脱嵌锂过程中存在的化学-机械协同作用导致电池的循环失效问题突出,阻碍了其进一步发展。研究人员对此失效行为开展了大量研究,并提出掺杂、包覆、表面及晶界改性等各种正极材料改性策略,但是合成过程中形成的晶格缺陷和异质结构往往对此失效行为具有重要影响。因此,深入了解合成过程中各种控制因素对材料结构的影响很有必要。本文旨在阐明合成过程中前驱体、锂盐、烧结温度、保温时间和烧结气氛等因素对LiTMO_(2)材料结构的影响效果及机理,以期为研究者优化合成获得高性能LiTMO_(2)材料提供参考和依据。Layered transition metal oxides(LiTMO_2)are candidate cathode materials for high-energy-density lithium-ion batteries,primarily owing to their high theoretical specific capacity.Nevertheless,the persistent challenge of chemical-mechanical failure during charge-discharge cycling has impeded its progressive development.In numerous prior investigations,researchers have diligently explored the cycling failure of this material family,presenting a spectrum of modification strategies aimed at addressing this issue including doping,coating,surface or grain boundary modification.Given the impact of lattice defects and heterogeneous structures introduced throughout the synthesis process cannot be overlooked,a comprehensive comprehension of the influence exerted by various controlling factors on the structural formation of materials is imperative.This review aims to elucidate the ramifications of control factors,including precursor,lithium salt,sintering temperature,holding time,and sintering atmosphere,on the material structure during the synthesis process.The objective is to provide the battery community with valuable insights on strategies to synthesize high-performance LiTMO_(2)materials.

关 键 词：锂离子电池 层状氧化物正极材料 合成 结构 性能 

分 类 号：TM911[电气工程—电力电子与电力传动]