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.
作者
于志辉
赵子萌
李彪
夏定国
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)
出处
《电源技术》
CAS
北大核心
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)。
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
lithium ion batteries
Li-rich cathode materials
voltage hysteresis
ordered and disordered structure
