通过自模板法采用马来酸酐与丙烯酸接枝共聚得到改性聚丙烯酸碳酸盐前驱体, 模板结构呈交联网状稳固致密, 高温烧结制得5 V锂离子电池 LiNi0.5Mn1.5O4正极材料。经XRD、SEM、恒电流充放电和电化学循环伏安测试, 所得材料具有微纳米结构, 晶型规则, 粒径大小一致。工作平台为4.7 V, 在 0.5 C倍率下充放电循环测试, 首次放电容量132 mAh/g, 循环50次容量保持率为93%, 电化学性能优良。

Modification of polyacrylic acid carbonate precursor by self-template graft copolymerization of maleic anhydride and acrylic acid. The structure was stable and dense in the form of intersection network. LiNi0.5Mn1.5O4 cathode material for 5V lithium ion battery was prepared by high temperature sintering. XRD, SEM, galvanostatic charge discharge and electrochemical cyclic voltammetry show that the material has micro-nanostructure, regular crystal shape and uniform particle size. The working platform was 4.7 V, The first discharge capacity was 132 mAh/g at 0.5 C rate. The capacity retention rate of 50 cycles was 93%. The electrochemical performance is excellent.