文献类型：期刊文献

英文题名：Sol-gel synthesis of nano Li1.2Mn0.54Ni0.13Co0.13O2 cathode materials using DL-lactic acid as chelating agent

作者：Chen, Can Wu, Hongming Zhou, Dengfeng Xu, Dinghong Zhou, Ying Guo, Jianbing

第一作者：Chen, Can

通信作者：Wu, HM[1];Guo, JB[1]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Mat Ind Technol Inst, Mat Technol Innovat Base Guizhou Prov, Guiyang 550014, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China.

年份：2021

卷号：47

期号：5

起止页码：6270-6278

外文期刊名：CERAMICS INTERNATIONAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000615087300001)】；

基金：This work is financially supported by National Natural Science Foundation of China (51774012), High-level Innovative Talents Training Project of Guizhou (2016/5667, 2019/5035), and Natural Science Research Project of Guizhou Department of Education ([2019] 068).

语种：英文

外文关键词：Lithium-ion battery; Lithium-rich cathode material; Sol-gel method; DL-Lactic acid

摘要：Lithium-rich cathode materials Li1.2Mn0.54Ni0.13Co0.13O2 (LMNCO) are prepared by sol-gel method using DL lactic acid as chelating agent. The effect of pH on crystal structures, morphologies, particle sizes, and electrochemical properties of cathode materials are studied by X-ray diffractometry (XRD), scanning electron microscopy (SEM), nanoparticle analysis, charge-discharge tests, and electrochemical analysis. The Li1.2Mn0.54Ni0.13Co0.13O2 cathodes exhibit well-ordered layered structures consisting of hexagonal LiMO2 and monoclinic Li2MnO3 with smooth surfaces and well-crystallized particles (100-500 nm). LMNCO-7.0 exhibits smaller particle sizes than LMNCO-5.5 and LMNCO-8.5 and better electrochemical performance. The first discharge capacity and Coulombic efficiency of LMNCO-7.0 are 232.31 mAh g(-1) and 73.2%, respectively. After 50 cycles, discharge capacity of LMNCO-7.0 decrease to 194.93 mAh g(-1). LMNCO-7.0 cathode shows superior discharge capacity and rate performance due to its low charge transfer impedance and small average quasi spherical particle diameter.