Insights into the doping functions on redox chemistry of layered Ni-rich cathodes  

作　　者：Zhenxing Wang Yong Chen 

机构地区：[1]School of Materials and Energy,Foshan University,Foshan 528225,Guangdong,China

出　　处：《Journal of Energy Chemistry》2025年第3期386-412,共27页能源化学(英文版)

基　　金：supported by the National Natural Science Foundation of China(22209055);the China Postdoctoral Science Foundation(2022M721330);the Foshan Postdoctoral Science Foundation(X221081MS210);the Innovation Team of Universities of Guangdong Province(2022KCXTD030);the“Targeted Technology Innovation Initiative”Project at the Foshan National Institute of Innovation(JBGS2024002)。

摘　　要：In pursuit of low cost and long life for lithium-ion batteries in electric vehicles,the most promising strategy is to replace the commercial LiCoO_(2)with a high-energy-density Ni-rich cathode.However,the irreversible redox couples induce rapid capacity decay,poor long-term cycling life,vast gas evolution,and unstable structure transformations of the Ni-rich cathode,limiting its practical applications.Element doping has been considered as the most promising strategy for addressing these issues.However,the relationships between element doping functions and redox chemistry still remain confused.To clarify this connection,this review places the dynamic evolution of redox couples(Li^(*),Ni^(2+)/Ni^(3+)/Ni^(4+)-e^(-),O^(2-)/O^(n-)/O_(2)-e^(-))as the tree trunk.The material structure,degradation mechanisms,and addressing element doping strategies are considered as the tree branches.This comprehensive summary aims to provide an overview of the current understanding and progress of Ni-rich cathode materials.In the last section,promising strategies based on element doping functions are provided to encourage the practical application of Ni-rich cathodes.These strategies also offer a new approach for the development of other intercalated electrode materials in Na and K-based battery systems.

关 键 词：Doping functions Redox chemistry Ni-rich cathode Phase transition Structural stability 

分 类 号：TM912[电气工程—电力电子与电力传动]