电池2026，Vol.56Issue(1)：30-36,7.DOI:10.19535/j.1001-1579.2026.01.005
Al2O3包覆对LiNi0.5Co0.2Mn0.3O2电化学性能的影响
Effect of Al2O3 coating on electrochemical performance of LiNi0.5Co0.2Mn0.3O2
摘要
Abstract
Surface coating is an important means to delay the aging of cathode materials in Li-ion batteries.The aluminum oxide(Al2O3)coating materials with α,θ,δ and γ crystalline phases are prepared by adjusting the calcination temperature,the effect of the coating layer on the performance of LiNi0.5Co0.2Mn0.3O2(NCM523)cathode material is studied.The Al2O3 coatings enhance the electrochemical performance of the cathode material.The coating layers suppress interfacial side reactions between the active material and the electrolyte,reduce the dissolution of transition metal ions,and improve the structural stability of the material.When charged and discharged in 3.0-4.3 V,batteries assembled with the Al2O3-coated cathode exhibit a discharge specific capacity of 115.3 mAh/g at a high rate of 5.0 C and maintain a discharge specific capacity of 124.1 mAh/g after 300 cycles at 1.0 C.关键词
锂离子电池/正极材料/LiNi0.5Co0.2Mn0.3O2(NCM523)/Al2O3包覆Key words
Li-ion battery/cathode material/LiNi0.5Co0.2Mn0.3O2(NCM523)/Al2O3 coating分类
信息技术与安全科学引用本文复制引用
李芳润,陈海波,李杭,胡敬,张健力,陈强,侯广亚,唐谊平..Al2O3包覆对LiNi0.5Co0.2Mn0.3O2电化学性能的影响[J].电池,2026,56(1):30-36,7.基金项目
国家自然科学基金面上项目(52271039),国家自然科学基金青年科学基金项目(52202315,52202313),浙江省尖兵领雁研发计划(2025C01182),浙江省自然科学基金(LZ22E010002,LQ22E020005) （52271039）
