摘要
高镍三元正极材料镍钴铝(NCA)因具有较高的能量密度及工作电压、成本低、环境友好等优点极有可能成为下一代广泛应用的锂离子电池正极材料之一。然而镍含量的提高导致材料结构不稳定、循环性能和倍率性能降低,限制了其进一步发展。主要从锂位、过渡金属位、氧位掺杂及复合共掺杂4个方面综述了不同位置离子掺杂的改性机理。大量研究结果表明,通过复合共掺杂方式进行改性,能够结合单离子掺杂的优点有效提升镍钴铝正极材料的电化学性能。
Due to the high energy density,high working voltage,low cost and environmental friendliness,high nickel ternary nickel⁃cobalt⁃aluminum(NCA)cathode material is likely to become one of the next generation widely used cathode materi⁃als for lithium ion batteries.However,increasing of nickel content,resulting in more unstable material structure,reduced cycle performance,and rate capability,limits its further development.The modification mechanism of ion doping at different positions from four aspects:lithium site,transition metal site,oxygen site doping and composite co⁃doping were summarized.A large number of research results showed that modification by composite co⁃doping could effectively improve the electro⁃chemical performance of nickel⁃cobalt⁃aluminum cathode materials by combining the advantages of single ion doping.
作者
侯顺丽
赵段
周庚
魏诗诗
李健
王甲泰
HOU Shunli;ZHAO Duan;ZHOU Geng;WEI Shishi;LI Jian;WANG Jiatai(College of Physics and Electronic Information Engineering,Qinghai Normal University,Xining 810000,China)
出处
《无机盐工业》
CAS
CSCD
北大核心
2022年第8期40-46,共7页
Inorganic Chemicals Industry
基金
青海省自然科学基金项目(2019-ZJ-957Q)
青海师范大学青年科研基金项目(2019zr015)。
关键词
NCA正极材料
离子掺杂改性
容量衰减机理
电化学性能
NCA cathode material
ion doping modification
capacity decay mechanism
electrochemical performance
