阴极
表面改性
材料科学
电化学
氧化物
纳米技术
过渡金属
过程(计算)
化学工程
工程物理
计算机科学
电气工程
电极
冶金
工程类
化学
催化作用
生物化学
操作系统
物理化学
作者
Ju‐Myung Kim,Xianhui Zhang,Ji‐Guang Zhang,Arumugam Manthiram,Ying Shirley Meng,Wu Xu
标识
DOI:10.1016/j.mattod.2020.12.017
摘要
An ever-increasing market for electric vehicles (EVs), electronic devices and others has brought tremendous attention on the need for high energy density batteries with reliable electrochemical performances. However, even the successfully commercialized lithium (Li)-ion batteries still face significant challenges with respect to cost and safety issues when they are used in EVs. From a cathode material point of view, layered transition-metal (TM) oxides, represented by LiMO2 (M = Ni, Mn, Co, Al, etc.) and Li-/Mn-rich xLi2MnO3·(1–x)LiMO2, have been considered as promising candidates because of their high theoretical capacity, high operating voltage, and low manufacturing cost. However, layered TM oxides still have not reached their full potential for EV applications due to their intrinsic stability issues during electrochemical processes. To address these problems, a variety of surface modification strategies have been pursued in the literature. Herein, we summarize the recent progresses on the enhanced stability of layered TM oxides cathode materials by different surface modification techniques, analyze the manufacturing process and cost of the surface modification methods, and finally propose future research directions in this area.
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