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, Hongming

机构：[1] Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China; [3] Guizhou Material Industrial Technology Institute, Material Technology Innovation Base of Guizhou Province, Guiyang, 550014, China; [4] School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

通信机构：National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China;National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, 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：EI(收录号：20204609482565);Scopus(收录号：2-s2.0-85095793432)

语种：英文

外文关键词：Lactic acid - Sol-gels - Scanning electron microscopy - Cathodes - Sol-gel process - X ray diffraction analysis - Electric discharges - Lithium compounds - Particle size - Charge transfer - Manganese compounds - Chelation - Particle size analysis

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. ? 2020 Elsevier Ltd and Techna Group S.r.l.