PAGEII题目:流变相反应法制备锂二次电池正极材料LiV3-xZnxO8摘要具有层状结构的LiV3O8具有稳定的晶体结构、低成本、高比容量、丰富的原材料以及在空气中稳定存在等特性。因此，近20年来其作为二次锂离子电池正极材料的研究受到了人们的广泛关注。本文中，采用低温下流变相法掺杂Zn来合成正极材料LiV1-xZnxO8，并对所合成材料的制备条件以及电化学性能进行研究。其主要内容为：称取不同比例的LiOH、NH4VO3和Zn（CH3COOH）2进行研磨，然后加二次蒸馏水调和成流变相于反应釜内80℃保湿6小时之后干燥12小时。研磨后中不同的温度煅烧10小时即得所需产物。通过XRD测试表明通过流变相法成功制备了LiV3-xZnxO8产物。实验表明400℃温度下加热处理10小时得到的LiV3-xZnxO8样品具有的首次放电容量达到257.4mAh/g，而且其循环性能优良，在经过30周循环以后，其比容量仍能达到236.9mAh/g。此结果说明与LiV3O8相比，LiV3-xZnxO8中放电比容量和充电性能以及循环性能上表现出了良好的优越性，使得钒酸锂作为锂电池正极材料的性能得到了明显的改善。关键词：钒酸锂掺杂，流变相反应法，锂离子电池，正极材料TitleDopedvanadiumlithiumrechargeablelithiumbatterycathodematerialAbstractLiV3O8withlayeredstructureLiV3O8displaysthecharacteristicsstablecrystalstructure,low-cost,high-capacity,abundantrawmaterialsandstabilityintheair.Therefore,forthepast20years,ithasbeenwidespreadconcernasarechargeablelithiumionbatterycathodematerial.Inthispaper,theuseoflowtemperaturedownstreamphasemethodthedopedZntosynthesizethecathodematerialLiV1-xZnxO8andthepreparationconditions,andelectrochemicalpropertiesofthesynthesizedmaterialsresearch.Itsmaincontentsare:WeighthedifferentproportionsofLiOH,NH4VO3andZn(CH3COOH)2grinding,Thenaddtwice-distilledwatertoreconcileintoatheologicalphasewithinthereactor80℃after6hoursmoisturizingdriedfor12hours.Aftercalcinedfor10hoursatdifferenttemperatures,thedesiredproductisobtained.ByXRDtestsshowthatbytherheologicalphasewassuccessfullypreparedLiV3-xZnxO8product.Theexperimentsshowthattheheatingtreatmenttemperatureof400℃for10hourstoobtainthesampleofLiV1-xZnxO8havingtheinitialdischargecapacityreaches257.4mAh/g，Anditsexcellentcyclingperformance,afterthe30weekcycles,thespecificcapacitycouldmeetthe236.9mAh/g.ThisresultiscomparedwithLiV3O8,LiV1-xZnxO8dischargethanthecapacityandchargingperformanceandcycleperformanceshowedthesuperiorityoflithiumvanadiumoxideasalithiumbatterycathodematerialperformancehasbeensignificantlyimproved.Keywords:LithiumvanadiumoxidedopedRheologicalphasereactionmethodLithiumironbatteryCathodematerial