水热法制备Li1.2Ni0.13Co0.13Mn0.54O2-LiMnPO4核-壳复合材料  

Preparing Li1.2Ni0.13Co0.13Mn0.54O2-LiMnPO4 core-shell composite via hydrothermal method

作　　者：张凯庆[1,2] 夏晴[1,2] 邹振耀[1,2] 王力臻 ZHANG Kai-qing;XIA Qing;ZOU Zhen-yao;WANG Li-zhen(Chongqing Vehicle Test & Resedrch Institute,Chongqing 401122,China;National Coach Quality Supervision & Testing Center,Chongqing 401122,China;Henan Provincial Key Laboratory of Surface Interface Science,Zhengzhou,Henan 450002,China)

机构地区：[1]重庆车辆检测研究院有限公司,重庆401122 [2]国家客车质量监督检验中心,重庆401122 [3]河南省表界面重点实验室,河南郑州450002

出　　处：《电池》2019年第1期36-40,共5页Battery Bimonthly

摘　　要：通过水热法制备核-壳结构的Li1.2Ni0.13Co0.13Mn0.54O2-LiMnPO4复合材料,用XRD、SEM、透射电子显微镜(TEM)、循环伏安(CV)、恒流充放电和交流阻抗等测试研究产物的形貌、结构及电化学性能。水热法可将LiMnPO4包覆在Li1.2Ni0.13Co0.13Mn0.54O2-LiMnPO4表面,复合材料的可逆比容量较高、循环稳定性较好包覆3%LiMnPO4的复合材料包覆更均匀,在2.0-4.8V充放电,首次0.10C放电比容量为267.0mAli/g,库仑效率为72.4%,第50次0.50C循环的放电比容量为176.0mAh/g。The Li1.2Ni0.13Co0.13Mn0.54O2-LiMnPO4 core-shell composite was synthesized by hydrothermal method. The morphology, structure and electrochemical performanc es of the as-prepared samples were studied by XRD, SEM , transmission electron microscope (TEM), cyclic voltammetry (CV), galvaiiostatie charge-discharge and AC impedance. The LiMnPO4 was coated on the Li1.2Ni0.13Co0.13Mn0.54O2 surface through hydrothermal method with high reversible specific capacity and good cycle stability. The composite malerial coated with 3% LiMnPO4 was more uniform.When chcirgrd-dischargrd in 2.0 - 4.8V, the 0. 10 C initial specific discharge capacity and the Coulonibic efficiency wiis 267.0 mAh/g and 72.4%, respectively. The specific discharge capacity at the 50th cycle (0.50C) was 176.0 mAh/g.

关 键 词：锂离子电池 正极材料 水热法 复合材料 核-壳结构 

分 类 号：TM912.9[电气工程—电力电子与电力传动]