The Mechanism of the Improvement on Cycling Performance and Thermal Stability of LiNi_(0.8)Co_(0.2)O_2 by Ti-doping

Authors

Han-san LIU, State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry, Xiamen University, Xiamen 361005, China;
Jie LI, State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry, Xiamen University, Xiamen 361005, China;
Zheng-liang GONG, State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry, Xiamen University, Xiamen 361005, China;
Zhong-ru ZHANG, State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry, Xiamen University, Xiamen 361005, China;
Yong YANG, State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry, Xiamen University, Xiamen 361005, China;

Abstract

Improved cycling performance and enhanced thermal stability were observed for Ti-doped LiNi_(0.8)Co_(0.2)O_2 cathode materials. The mechanism of these positive effects was investigated in this work. The improved cycling performance of Ti-doped cathodes is ascribed to the suppression of phase transitions and lattice changes during cycling, and the decrease of interfacial reaction activity between the cathode and electrolyte. The enhanced thermal stability of Ti-doped cathodes is attributed to the suppression of thermal decomposition reaction of delithiated cathode material, which will produce heat and oxygen gas as the cause of electrolyte decomposition and combustion reaction.

Keywords

Lithium nickel cobalt oxide, Ti-doping, Cycling performance, Thermal stability, Cathode materials, Lithium ion batteries

DOI Link

https://doi.org/10.61558/2993-074X.1612

Publication Date

2005-02-28

Online Available Date

2005-02-28

Revised Date

2005-02-28

Received Date

2005-02-28

Recommended Citation

Han-san LIU, Jie LI, Zheng-liang GONG, Zhong-ru ZHANG, Yong YANG. The Mechanism of the Improvement on Cycling Performance and Thermal Stability of LiNi_(0.8)Co_(0.2)O_2 by Ti-doping[J]. Journal of Electrochemistry, 2005 , 11(1): 46-52.
DOI: 10.61558/2993-074X.1612
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss1/9

References

[1]　ChangCC,KimJY,KimPN.Divalentcationincor poratedLi(1+x)MMgxO2(1+x)(M=Ni0.75Co0.25): viablecathodematerialsforrechargeablelithium ionbatteries[J].J.PowerSource,2000,89:56~63.
[2]　YoshioM,NoguchiH,ItohJ, etal.PreparationandpropertiesofLiCoyMnxNi1-x-yO2 asacathodeforlithi umionbatteries[J].J.PowerSource,2000,90:176~181.
[3]　MadhaviS,SubbaGV,ChowdariB, etal.Effectofa luminiumdopingoncathodicbehaviourofLiNi0.7Co0.3O2[J].J.PowerSource,2001,93:156~162.
[4]　PradoG,FournesL,DelmasC.OntheLixNi0.70Fe0.15Co0.15O2 system:AnX raydiffractionandM ssbauerstudy[J].J.SolidStateChem.,2001,159:103~112.
[5]　D′EpifanioA,CroceF,RonicF, etal.Thermal, elec trochemicalandstructuralpropertiesofstabilizedLiNiyCo1-y-zMzO2 lithium ioncathodematerialpre paredbyachemicalroute[J].Phys.Chem.Chem.Phys.,2001,3:4399~4403.
[6]　ParkSH,ParkKS,SunYK, etal.StructuralandelectrochemicalcharacterizationoflithiumexcessandAl dopednickeloxidessynthesizedbythesol gelmeth od[J].ElectrochemicaActa,2001,46:1215~1222.
[7]　FeyGT,SubramanianV,ChenJG.ElectrochemicalperformanceofSr2+ dopedLiNi0.8Co0.2O2 asacathodematerialforlithiumbatteriessynthesizedviaawetchemistryrouteusingoxalicacid[J].MaterialsLetters,2002,52:197~202.
[8]　OhzukuT,UedaA,YamamotoN.Zero straininsertionmaterialofLi[Li1/3Ti5/3]04 forrechargeablelithiumcells[J].J.Electrochem.Soc.,1995,142:1431~1435.
[9]　KajiyamaA,TakadaK,AriharaK, etal.Synthesisandelectrochemicalpropertiesoflithiumchromiumtita niumoxidewithramsdellitestructure[J].J.Electro chem.Soc.,2003,150:A157~A160.
[10]　KimJ,AmineK.TheeffectoftetravalenttitaniumsubstitutioninLiNi1-xTixO2(0.025≤x≤0.2)system[J].ElectrochemistryCommunications,2001,3:52~55.
[11]　KimJ,AmineK.Acomparativestudyonthesubstitu tionofdivalent, trivalentandtetravalentmetalionsinLiNi1-xMxO2(M =Cu2+,Al3+ andTi4+)[J].J.PowerSource,2002,104:33~39.
[12]　CroguenecL,SuardE, willamannP, etal.StructuralandelectrochemicalcharacterizationoftheLiNi1 yTiyO2 electrodematerialsobtainedbydirectsol id statereactions[J].Chem.Mater.,2002,14:2149~2157.
[13]　GaoY,YakovlevaM,EbnerW.NovelLiNi1 xTix/2Mgx/2O2 compoundsascathodematerialsforsaferlith ium ionbatteries[J].ElectrochemandSolidStateLetters,1998,1:117~119.
[14]　ChowdariB,RaoG,ChowSY.Cathodicbehaviorof(Co,Ti,Mg) dopedLiNiO2[J].SolidStateIonics,2001,140:55~62.
[15]　LiuHS,LiJ,ZhangZR, etal.Structural, electro chemicalandthermalpropertiesofLiNi0.8 yTiyCo0.2O2ascathodematerialsforlithiumionbatteries[J].ElectrochimicaActa,2004,49:1151~1159.
[16]　LiuHS,ZhangZR,GongZL, etal.AcomparativestudyofLiNi0.8Co0.2O2 cathodematerialsmodifiedbylatticedopingandsurfacecoating[J].SolidStateI onics,2004,166:317~325.
[17]　LiuHS,LiJ,ZhangZR, etal.Theeffectsofsinte ringtemperatureandtimeonthestructureandelectro chemicalperformanceofLiNi0.8Co0.2O2 cathodemate rialsderivedfromsol gelmethod[J].JournalofSolidStateElectrochemistry,2003,7:456~462.
[18]　OhzukuT,VedaA,NagayamaM.ElectrochemistryandstructuralchemistryofLiNiO2(R3m) for4Voltsecondarylithiumcells[J].J.Electrochem.Soc.,1993,140(7):1862~1869.
[19]　LiW,CurrieJC.Morphologyeffectsontheelectro chemicalperformanceofLiNi1-xCoxO2[J].J.Elec trochem.Soc.,1997,144:2773~2779.
[20]　AurbachD,LeviM,LeviE, etal.Commonelectroa nalyticalbehaviorofLiintercalationprocessesintographiteandtransitionmetaloxides[J].J.Electro chem.Soc.,1998,145:3024~3034.
[21]　LeviM,SalitraG,MarkovskyB, etal.Solid stateelectrochemicalkineticsofLi ionintercalationintoLi1-xCoO2:Simultaneousapplicationofelectroanalyti caltechniquesSSCV,PITT, andEIS[J].J.Electro chem.Soc.,1999,146:1279~1289.
[22]　ChenCH,LiuJ,AmineK.Symmetriccellapproachandimpedancespectroscopyofhighpowerlithium ionbatteries[J].J.PowerSources,2001,96:321~328.
[23]　AraiH,OkadaS,SakuraiY, etal.ThermalbehaviorofLi1 yNiO2 andthedecompositionmechanism[J].SolidStateIonics,1998,109:295~302.
[24]　AraiH,TsudaM,SaitoK, etal.Thermalreactionsbetweendelithiatedlithiumnickelateandelectrolytesolutions[J].J.Electrochem.Soc.,2002,149:A401~A406.