有序-无序结构复合的富锂正极材料  

Preparation and electrochemical properties of Li-rich cathode materials with ordered-disordered structure

作　　者：于志辉[1] 赵子萌 李彪[2] 夏定国[2] YU Zhi-hui;ZHAO Zi-meng;LI Biao;XIA Ding guo(College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China;Beijig Key Laboratory of Theory and Technology for Advanced Batteries Materials,College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]北京大学工学院先进电池材料理论与技术北京市重点实验室,北京100871

出　　处：《电源技术》2020年第9期1241-1245,共5页Chinese Journal of Power Sources

基　　金：国家重点研发计划(2016YFB0100200);国家自然科学基金青年项目(51802005)。

摘　　要：制备了一种有序层状与无序结构复合的锂离子电池富锂正极材料Li1.2Ni0.2Mn(0.6-x)TixO2(0<x<0.6),通过镍元素激发电极材料的电化学活性;引入Li2MnO3,优化热处理温度,调控有序层状-无序结构复合的相比例。所制备的Li1.2Ni0.2Mn0.4Ti0.2O2在经过700℃热处理后比容量达到341 mAh/g,比能量达到1 018 Wh/kg。Li1.2Ni0.2Mn0.6-xTixO2(0<x<0.6),a Li-rich cathode material with ordered-disordered structure,was prepared.The electrochemical activity of the electrode material was triggered by the doped Ni element.The regulation of ordered-disordered phase ratio was based on heat treatment temperature and introducing the Li2 MnO3 constituent.The prepared Li1.2Ni0.2Mn0.4Ti0.2O2 after 700℃heat treatment can deliver a large specific capacity of about 341 mAh/g,and energy density of 1018 Wh/kg.

关 键 词：锂离子电池 富锂正极材料 电压滞后 有序与无序复合结构 

分 类 号：TM912.9[电气工程—电力电子与电力传动]