高镍层状正极材料因其高比容量、高电压平台和低成本等优势,成为目前锂离子电池正极材料领域的研究重点。然而,高镍层状正极在长循环过程中面临着晶格结构坍塌、不可逆相变和界面副反应等问题,严重限制了其商业化发展。针对这些问题,研究人员采用了多种策略包括元素掺杂、表面包覆、共改性、浓度梯度及结构调控等,旨在改善高镍层状正极材料的电化学性能。对近年来高镍层状正极材料的改性研究进行了综述,总结了不同改性策略的作用机理,并为高镍层状正极材料未来发展方向进行了探讨和展望。

High-nickel layered cathode materials have emerged as a research focus in the field of lithium-ion battery cathodes due to their advantages of high specific capacity,high voltage plateau,and low cost.However,these materials face critical challenges during prolonged cycling,including lattice structure collapse,irreversible phase transitions,and interfacial side reactions,which severely hinder their commercial development.To address these issues,researchers have employed various strategies such as element doping,surface coating,co-modification,concentration gradient design,and structural optimization to enhance the electrochemical performance of high-nickel layered cathodes.This review summarized recent advancements in modification approaches for high-nickel layered cathode materials,elucidated the mechanisms underlying different optimization strategies,and provided insights into future research directions along with prospects for the development of these materials.