三元锂离子电池正极材料LiNi1-x-yCoxAlyO2的改性研究进展  

Review on the modification of ternary lithium ion battery cathode material LiNi1-x-yCoxAlyO2

作　　者：姚金雷 朱宇涛 徐艳辉 YAO Jinlei;ZHU Yutao;XU Yanhui(School of Mathematics and Physics,SUST,Suzhou 215009,China;School of Iron and Steel,Soochow University,Suzhou 215137,China)

机构地区：[1]苏州科技大学数理学院,江苏苏州215009 [2]苏州大学沙钢钢铁学院,江苏苏州215137

出　　处：《苏州科技大学学报（自然科学版）》2019年第2期1-6,共6页Journal of Suzhou University of Science and Technology（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21771136);苏州科技大学研究生创新工程项目(SKCX18_Y15)

摘　　要：三元正极材料LiNi1-x-yCoxAlyO2(NCA)具有比容量高、循环性能好等优点,是锂离子电池市场热销的正极材料。针对NCA存在循环容量差、高温不稳定的缺点,文章从化学组分优化和表面包覆两方面探讨NCA改性的实验手段和微观机理,综述了过渡金属元素掺杂、表面氟化、金属氧化物包覆、TiO2纳米纤维包覆、前驱体预处理等5种改性手段,探讨了NCA材料发展的限制因素。Ternary cathode material LiNi1-x-yCoxAlyO2(NCA) exhibits high specific capacity and good cycling performance,becoming a commercial cathode material in lithium ion battery market. In view of its poor capacity after long-time cycling and unstability at high temperatures,this review discusses the experimental methods and microscopic mechanism of NCA modification from the aspects of chemical composition optimization and surface coating. Five modification methods including transition metal element substitution,surface fluorination,metal oxide coating,TiO2 nanofiber coating and precursor pretreatment are reviewed and the limiting factors for the NCA modifications are investigated.

关 键 词：锂离子电池 三元正极材料 掺杂 包覆 预处理 

分 类 号：TM912.9[电气工程—电力电子与电力传动]