高能量密度锂离子电池用富锂正极材料
Lithium-Rich Cathode Materials for High Energy-Density Lithium-Ion Batteries

严武渭 ¹ 柳永宁 ² 崇少坤 ² 周亚萍 ² 刘建国 ¹ ^* 邹志刚 ¹ ^*

文摘	随着移动通讯设备和电动汽车的发展,对高比能量密度锂离子电池的需求越来越大。目前商业化动力电池主要釆用的磷酸铁锂和三元正极材料放电比容量均低于180 mAh/g,难以满足一次充电行驶500公里以上的要求,因此,正极材料的比容量已成为限制锂离子电池能量密度提高的瓶颈。富锂材料具有大的比容量(≥250 mAh/g)和高的放电电压(3.8 V),理论能量密度高达900 Wh/kg,是未来动力电池的理想正极材料,因而研究高比容量富锂正极材料具有非常重要的现实意义。本文回顾了锂离子电池正极材料的发展和目前商业化正极材料比容量低的现状,综述了新一代大比容量富锂正极材料的结构特征和电化学性质,以及放电机制和改性研究的最新进展,并指出现阶段高能量密度锂离子电池用富锂材料遇到的问题,且有针对性地提出了解决思路和方法。
其他语种文摘	With the development of mobile communication equipment and electric cars, there is an increasing demand for high capacity lithium-ion batteries. It is difficult for the present commercialized lithium-ion power batteries to meet the requirement of one charge to travel above 500 km,because of low discharge capacity,like lithium iron phosphate and ternary cathode material, possessing the discharge capacity lower than 180 mAh/g. Therefore, the specific capacity of cathode materials has become a bottleneck to increase the energy density of lithium-ion batteries. Lithium-rich cathode materials with large specific capacity (≥ 250 mAh/g),high discharge voltage (3.8 V), and high theory energy density (900 Wh/kg) are thought as ideal cathode material of power batteries for electric cars in the future, so, it is of great realistic significance to study the lithium-rich cathode materials with high specific capacity. This paper reviews the development of cathode materials for lithium-ion batteries as well as the situation of recent commercial cathode materials with low specific capacity. Structures and electrochemical properties of lithium-rich cathode materials as a new next-generation higher capacity are summarized, and the discharge mechanism and the latest progress in modifications are presented. Moreover, some problems related with lithium-rich materials for high energy-density lithium-ion batteries are presented, followed by the corresponding ideas and approaches of solution.
来源	化学进展 ,2017,29(2/3):198-209 【核心库】
DOI	10.7536/pc161104
关键词	锂离子电池 ; 富锂材料 ; 层-尖转变 ; 表面包覆
地址	1. 南京大学现代工程与应用科学学院, 南京, 210093 2. 西安交通大学材料科学与工程学院, 西安, 710049
语种	中文
文献类型	研究性论文
ISSN	1005-281X
学科	化学;电工技术
基金	中央高校基本科研业务费 ; 江苏省优势学科项目 ; 江苏省六大人才高峰和江苏省青蓝工程项目
文献收藏号	CSCD:6049634