电源技术2025，Vol.49Issue(12)：2501-2508,8.DOI:10.3969/j.issn.1002-087X.2025.12.005
内嵌La4LiNiO8强化LiNiO2单晶高镍正极材料的结构稳定性
Intensified structural stability of LiNiO2 single-crystal Ni-rich cathode by embedded La4LiNiO8 phase
摘要
Abstract
Ni-rich cathode materials have garnered significant attention in lithium-ion battery due to their high specific capacity and environmental friendliness.However,challenges of structural and performance degradation caused by surface/interface side reactions and lattice distortion remain to be addressed.Traditional modification methods primarily include doping,coating,and gradient de-sign.Here,La and Ce were introduced to synthesize single-crystal nickel-rich cathode materials with embedded La4LiNiO8 perovskite phases.The synergistic effect of the embedded La4LiNiO8 phase and Ce4+enhances the structural stability and electrochemical performance of the single-crystal LiNiO2 nickel-rich cathode material by expanding layer spacing,suppressing lattice distortion,and improv-ing surface/interface characteristics.The cycling capacity retention of the single-crystal LiNiO2 cath-ode material significantly increased from 30.9％to 94.2％after 100 cycles at 0.5 C.Furthermore,the embedded La4LiNiO8 reduces the interfacial impedance of the single-crystal LiNiO2 Ni-rich cathode material and promotes uniform growth of the cathode electrolyte interphase.This work provides a novel approach for the preparation and modification of single-crystal Ni-rich cathode materials.关键词
锂离子电池/LiNiO2/单晶/钙钛矿相/La4LiNiO8Key words
lithium-ion battery/LiNiO2/single-crystal/perovskite phase/La4LiNiO8分类
信息技术与安全科学引用本文复制引用
王国贤,王凯,胡成志,黄超仁,宋晨,黄嗣杰,徐汶宇,陈章贤..内嵌La4LiNiO8强化LiNiO2单晶高镍正极材料的结构稳定性[J].电源技术,2025,49(12):2501-2508,8.基金项目
安徽省自然科学基金(2208085MB34) （2208085MB34）
安徽省科技重大专项(202003a05020046) （202003a05020046）
