溫度對li2cosio4正極材料的結(jié)構(gòu)和性能的影響研究【畢業(yè)設(shè)計(jì)】

1、（20屆）屆）本科畢業(yè)設(shè)計(jì)本科畢業(yè)設(shè)計(jì)溫度對Li2CoSiO4正極材料的結(jié)構(gòu)和性能的影響研究StudyontheEffectofTemperatureontheStructurePerfmanceofLi2CoSiO4asCathodeMaterialfLithiumIonBatteries所在學(xué)院專業(yè)班級化學(xué)學(xué)生姓名學(xué)號指導(dǎo)教師職稱完成日期年月IIStudyontheEffectofTemperatureontheStructureP

2、erfmanceofLi2CoSiO4asCathodeMaterialfLithiumIonBatteriesAbstract【ABSTRACT】InthispaperLi2CoSiO4withaspacegroupofPmn21wassynthesizedbyhydrothermalrouteat160℃.AseriesofLi2CoSiO4withdifferentstructureswereobtainedaftertheasp

3、reparedsamplewascalcinedatdifferenttemperatures(400600800℃).Comparedwithothersamplesitisfoundthatthecompoundpreparedat800℃showsthehighestsurfacereactivity.Asaresultmefunctionalgroupscanbeidentifiedtoabsbedairmoleculesbyi

4、nfraredspectroscopy.XRDresultsshowthatthestructureofLi2CoSiO4canchangefromβII(Pmn21)intoβI(Pcn21)withanincreaseofcalcinedtemperaturefromroomtemperatureto800℃.Basedontheresultsfromelectrochemicalimpedancespectroscopyitisk

5、nownthatLi2CoSiO4obtainedat800℃showsthebestdynamicpropertiesamongfoursamples.Furthermeareversibledisgecapacityof201.5mAhgcanbedeliveredbythiscompoundwhichishigherthanthatreleasedbyothersamples.TherefeLi2CoSiO4preparedat8