高能量密度锂离子电池层状锰基正极材料研究进展  

Research progress of layered Mn-based cathode materials for high-energy-density lithium-ion batteries

作　　者：马磊磊[1] 连芳[1] 张帆[1] 丁鹏冲 刘大亮 陈彦彬 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]江苏当升材料科技有限公司,海门226100

出　　处：《工程科学学报》2017年第2期167-174,共8页Chinese Journal of Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2013AA050901)

摘　　要：层状锰基材料Li[Li_x(MnM)_(1-x)]O_2(M=Ni,Co,Cr,…)以高比容量成为最具应用前景的正极体系之一,近年来成为研究热点而倍受关注,尤其借助原位测试分析等先进表征手段,对Li[Li_x(MnM)_(1-x)]O_2的结构及其高容量获取机理的研究取得显著进展.本文概括介绍了高能量密度层状正极材料的结构与充放电机理,重点针对其目前依然存在的问题,详细归纳了Li[Li_x(MnM)_(1-x)]O_2正极材料充放电循环过程中电压衰减机理、界面/表面特征以及性能改善的研究新进展,而且对高能量密度层状正极材料的未来研究方向也进行了探讨.Layered Mn-based series Li[ Lix （MnM） 1-x ] O2 （ M = Ni, Co, Cr, …… ） due to its much higher capacity is one of the very promising candidates O2 cathodes, which has become a research hotspot recently and attracted more and more attention. Especially, with the aid of advanced characterization techniques including in-situ analysis, studies on the complex structure and high-capacity delivering mechanism of the series have achieved significant progress. In the paper, the structural characterization and charge-discharge behavior of the high-energy density layered cathode were briefly introduced. Study progresses on the voltage degradation, interface/surface variation during cycling and performance improvements of Li [Lix （ MnM ） 1-x ] O2 were reviewed in detail particularly in view of its exiting issues, Furthermore, the challenges and prospects in the high-energy density layered cathode materials were also discussed herein.

关 键 词：锂离子电池 层状材料 高能量密度 电压衰减 界面 

分 类 号：TM912.9[电气工程—电力电子与电力传动]