云南化工2018，Vol.45Issue(11)：142-144,3.DOI:10.3969/j.issn.1004-275X.2018.11.059
锂离子电池富锂锰基正极材料的制备与研究
Preparation and Study of Lithium-Ion-Based Cathode Materials for Lithium Ion Batteries
张凯 1胡永清 2刘俊杰 1吴雄伟1
作者信息
- 1. 湖南农业大学 理学院, 湖南 长沙 410128
- 2. 湖南省银峰新能源有限公司, 湖南 长沙 410000
- 折叠
摘要
Abstract
The precursor of xLi2MnO3· (1-x) LiNi0.8Co0.2O2 (x=0.3～0.7) cathode material was synthesized by simple impregnation method, and the final nanoparticles were obtained by calcination at high temperature.X-ray diffraction and scanning electron microscopy studies have confirmed that xLi2MnO3· (1-x) LiNi0.8Co0.2O2 (x=0.3～0.7) has a complete structure of layered nanomaterials.With the increase of Li2MnO3, the X-ray diffraction peaks of superlattices between 20 to 23 degrees gradually become obvious, which represents the formation of Li2MnO3-like components in monoclinic system (C2/m).Moreover, Li+ are orderly arranged in the transition metal layer.Further electrochemical results show that 0.5Li2MnO3·0.5LiNi0.8Co0.2O2 has good discharge capacity.After 70 cycles, the discharge capacity remains at 201mAh/g, and the capacity retention rate is 95％.In addition, 0.7Li2MnO3·0.3LiNi0.8Co0.2O2 has good cycle stability although its discharge capacity is low.This work may provide a new idea for the synthesis of lithium-rich layered cathode materials.关键词
锂离子电池/富锂锰基正极材料/循环稳定性Key words
lithium ion battery/lithium-rich manganese-based cathode material/cycle stability分类
信息技术与安全科学引用本文复制引用
张凯,胡永清,刘俊杰,吴雄伟..锂离子电池富锂锰基正极材料的制备与研究[J].云南化工,2018,45(11):142-144,3.
