2023年1月云南化工Jan.2023第50卷第1期YunnanChemicalTechnologyVol.50,No.1doi:10.3969/j.issn.1004-275X.2023.01.10氧化铟包覆镍锰酸锂正极材料的电化学性能研究*蔡敏,赵汉民,吴春燕,高娟凤(广西民族师范学院化学与生物工程学院,广西崇左532200)摘要:为改善镍锰酸锂的电化学性能,以硝酸铟(In(NO3)3·H2O)为原料,通过高温固相法在镍锰酸锂电极材料表面包覆一层惰性氧化铟(In2O3),并研究不同In2O3包覆量对镍锰酸锂复合材料的电化学性能的影响。XRD测试结果显示,包覆氧化铟并不会改变正极材料LiNi0.5Mn1.5O4自身结构。当包覆量为7%时,在0.1mA的测试电流下首次放电比容量为134.21mAh/g,明显高于未涂覆材料(115.65mAh/g),100次循环后容量为128.4mAh/g,容量保持率为95.67%;在0.5mA的测试电流条件下,首次放电比容量为78.13mAh/g,100次循环后比容量为56.25mAh/g,容量保持率为64.44%。In2O3包覆起到保护材料和促进离子传导的作用,可有效提高正极材料的电化学性能。关键词:氧化铟;镍锰酸锂;包覆;电化学性能中图分类号:TM911文献标识码:A文章编号:1004-275X(2023)01-0036-04ElectrochemicalPropertiesofIndiumOxideCoatedLiNi0.5Mn1.5O4AnodeMaterial*CaiMin,WuChunyan,ZhaoHanmin,WeiQiaoqiao(CollegeofChemicalandBiologicalEngineering,GuangxiNormalUniversityforNationalities,Chongzuo532200,China)Abstract:InordertoimprovetheelectrochemicalperformanceofLiNi0.5Mn1.5O4,alayerofinertindiumoxide(In2O3)wascoatedonthesurfaceoflithiumnickel-manganateelectrodematerialbyhightemperaturesolidphasemethodusingindiumnitrate(In(NO3)3·H2O)asrawmateri-al,andtheeffectofdifferentamountofIn2O3coatingontheelectrochemicalperformanceoflithiumnickel-manganatecompositematerialwasstudied.XRDtestresultsshowthatcoatingindiumoxidedoesnotchangethestructureofanodematerialLiNi0.5Mn1.5O4.Whenthecoatingvol-umeis7%,thefirstdischargespecificcapacityis134.21mAh/gat0.1mAtestcurrent,whichissignificantlyhigherthanthatoftheuncoatedmaterial(115.65mAh/g).After100cycles,thecapacityis128.4mAh/g,andthecapacityretentionrateis95.67%.Underthetestcurrentconditionof0.5mA,thefirstdischargespecificcapacityis78.13mAh/g,after100cyclesthespecificcapacityis56.25mAh/...