摘要
层状富锂锰基镍钴锰(Ni-Co-Mn)(NCM)正极材料成本低,比容量高,安全性好,是极具商业前景的三元正极材料,但存在首次不可逆容量大、高电压、高倍率和高温条件下循环性能差等缺陷。为有效改善富锂锰基NCM材料的首次充放电容量、倍率特性和循环性能等电化学性能,研究者们通过表面包覆、元素掺杂和优化制备工艺等手段进行改性。从改进材料制备工艺环节角度,评述了原材料的恰当选择、材料形貌的特殊结构、与导电剂材料复合及与其他正极材料混合4方面的研究进展,并展望了今后的研究方向。
Li-rich Mn-based layered Ni-Co-Mn anode material is one of the promising candidates of the commercial anode materials which will well satisfy the market's requirements for the low cost,high specific capacity and the good safety.However,there are some defects such as the large initial irreversible capacity and poor cycle ability under the high voltage,high rates and high temperature.Usually,the electrochemical performances have been greatly improved by means of coating,doping and optimizations of preparations.The preparations about the best choice of raw materials,the special structure,the composite with the conductive agent and the blend with other anode materials,were discussed and analyzed.And then,the developmental direction in the future was proposed.
作者
高玉梅
杨文鑫
黄岚
Gao Yumei;Yang Wenxin;Huang Lan(Zhongshan Institute,University of Electronic Science and Technology,Zhongshan 528402)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第12期31-35,共5页
New Chemical Materials
基金
国家自然科学基金(113050310)
中山市科技计划项目(2018B1127)
中山市引进创新创业科研团队计划项目(170615151170710
170605181170737)
关键词
富锂锰基
NCM正极材料
改善
电化学性能
Li-rich Mn-basing
NCM anode material
improvement
electrochemical performance