2023.1Vol.47No.1研究与设计收稿日期:2022-06-26作者简介:许国峰(1981—),男,安徽省人,高级工程师,主要研究方向为锂离子电池正极材料。掺锑二氧化锡包覆改善LiNi0.82Co0.11Mn0.07O2正极材料性能研究许国峰1,2,马帅1,裴东1,2,王九洲2(1.天津蓝天太阳科技有限公司,天津300384;2.中国电子科技集团公司第十八研究所,天津300384)摘要:采用固相法在LiNi0.82Co0.11Mn0.07O2(高镍NCM)正极材料表面包覆了纳米掺锑二氧化锡(ATO),并对比了不同包覆比例对正极材料性能的影响。扫描电子显微镜(SEM)检测表明,ATO在高镍NCM正极材料表面均匀分布。相比未包覆的高镍NCM正极材料(P-NCM),经过包覆的高镍NCM(ATO-NCM)表现出了更好的倍率性能与循环性能,0.25%(质量分数)ATO-NCM常温时3C的放电比容量可达178.76mAh/g,而P-NCM的放电比容量仅为166.02mAh/g,1C50次循环后,0.25%的ATO-NCM材料的循环容量保持率为95.6%,远高于P-NCM的91.2%。ATO包覆可将高镍NCM的热分解温度提升10℃以上,且放热量更低。关键词:正极材料;掺锑二氧化锡;表面包覆中图分类号:TM912文献标识码:A文章编号:1002-087X(2023)01-0024-04DOI:10.3969/j.issn.1002-087X.2023.01.006ResearchontheimprovementofSb-dopedSnO2coatedLiNi0.82Co0.11Mn0.07O2XUGuofeng1,2,MAShuai1,PEIDong1,2,WANGJiuzhou2(1.TianjinLantianSolarTechCo.,Ltd.,Tianjin300384,China;2.TianjinInstituteofPowerSources,Tianjin300384,China)Abstract:Nanoantimonydopedtindioxide(ATO)wascoatedonthesurfaceofthecathodematerialLiNi0.82Co0.11Mn0.07O2(NCM)bysolidstatemethod,andtheeffectsofdifferentcoatingratiosonthepropertieswerecompared.SEMshowedthatATOwasevenlydistributedonthesurfaceofhighnickelNCMcathodematerial.Comparedwiththeuncoatedmaterial(P-NCM),thecoatedNCM(ATO-NCM)showsbetterrateperformanceandcycleperformance.Atroomtemperature,thespecificdischargecapacityof0.25%ATO-NCMat3Ccanreach178.76mAh/g,whilethatofP-NCMisonly166.02mAh/g.After50cyclesat1C,thecyclecapacityretentionrateof0.25%ATO-NCMmaterialis95.6%,muchhigherthan91.2%ofP-NCM.ATOcoatingcanincreasethethermaldecompositiontemperatureofhighnickelNCMbymorethan10℃andlowerheatrelease.Keywords:cathodematerials;antimonydopedtinoxide;surfacecoating锂离子电池已广泛应用于消费类电...