以PEO8 LiClO4作母体,纳米SiO2为填料,制成PEO8 LiClO4 SiO2(x%)系列复合聚合物电解质,测定这该电解质的电导率、锂离子迁移数和电化学稳定窗口,并对其晶态结构作差热分析表征.结果表明,纳米SiO2的引入,显著提高了电解质的电导率,在22℃时达到4.3×10-5S·cm-1.此外,还探讨了填料对复合聚合物电解质电导率提高的影响机理.
Composite polymer electrolytes were prepared by introducing nano-scale SiO_(2)into PEO_(8)-LiClO_(4)matrix. The ionic conductivity, lithium transference number and the electrochemical stability windows were measured. The phase component was evaluated with DSC techniques. The results showed that the introduction of nano fillers enhanced the ionic conductivity. It reached 4.3×10~(-5 ) S·cm~(-1)at 22 ℃. The conductivity enhancement of the composite polymer electrolytes is analyzed and proposed.
[1] JacobMME,HackettE,GiannelisEP.Fromnanocompositetonanogelpolymerelectrolytes[J].J.Mater.Chem.,2003,13:1～5.
[2] ChintapilliS,FrechR.EffectofplasticizersonhighmolecularweightPEO LiCF3SO3complexes[J].SolidStateIonics,1996,86～88(1):341～347.
[3] WieczorekW,SuchK,WycislikH,etal.ModificationsofcrystallinestructureofPEOpolymerelectrolyteswithceramicadditives[J\〗.SolidstateIonics,1989,36(3～4):255～257.
[4] CroceF,AppetecchiGB,PersiGB,etal.Nanocompositepolymerelectrolytesforlithiumbatteries[J].Nature,1998,394(6692):456～458.
[5] CroceF,CuriniR,MartinelliA,etal.Physicalandchemicalpropertiesofnanocompositepolymerelectrolytes[J].J.Phys.Chem.B,1999,103(48):10632～10638.
[6] LiQ,SunHY,TakedaY,etal.Interfacepropertiesbetweenalithiummetalelectrodeandapoly(ethyleneoxide)basedcompositepolymerelectrolyte[J].J.PowerSources,2001,94(2):201～205.
[7] TambelliCC,BloiseAC,RosarioAV,etal.CharacterisationofPEO Al2O3compositepolymerelectrolytes[J].ElectrochimicaActa,2002,47(11):1677～1682
[8] LiuY,LeeJY,HongL.FunctionalizedSiO2inpoly(ethyleneoxide) basedpolymerelectrolytes[J].JournalofPowerSources,2002,112(2):671～675
[9] ForsythM,MacfarlaneDR,BestA,etal.Theeffectofnano particleTiO2fillersonstructureandtransportinpolymerelectrolytes[J].SolidStateIonics,2002,147(3～4):203～211.
[10] JayathilakaPARD,DissanayakeMAKL,AlbinssonI,etal.Effectofnano porousAl2O3onthermal,dielectricandtransportpropertiesofthe(PEO)9LiTFSIpolymerelectrolytesystem[J].ElectrochimicaActa,2002,47(20):3257～3268.
[11] WangZX,HuangXJ,ChenLQ.Understandingofeffectsofnano Al2O3particlesonionicconductivityofcompositepolymerelectrolytes[J].ElectrochemicalandSolid StateLetters,2003,6(11):E40～E44.
[12] EvansJ,VicentCA,BrucePG.Electrochemicalmeasurementoftransferencenumbersinpolymerelectrolytes[J].Polymer,1987,28(12):2324～2328.
[13] AbrahamKM,JiangZ,CarrollB.HighlyconductivePEO likepolymerelectrolytes[J].Chem.Mater.,1997,9(9):1978～1988.
[14] CapigliaC,MustarelliP,QuartaroneE,etal.EffectofnanoscaleSiO2onthethermalandtransportpropertiesofsolvent free,poly(ethyleneoxide)(PEO) basedpolymerelectrolytes.SolidStateIonics,1999,118(1～2):73～79.
[15] AppetecchiGB,PasseriniS.PEO carboncompositelithiumpolymerelectrolyte[J].ElectrochimicaActa,2000,45(13):2139 2145.
[16] KrawiecW,ScanlonLG,FellnerJrLP,etal.Polymernanocomposites:anewstrategyforsynthesizingsolidelectrolytesforrechargeablelithiumbatteries[J].JournalPowerSources,1995,54(2):310～315.
[17] JiKwang Sun,MoonHee Soo,KimJong Wook,etal.Roleoffunctionalnano sizedinorganicfillersinpoly(ethylene)oxide basedpolymerelectrolytes[J].JournalofPowerSources,2003,117(1～2):124～130.
[18] SunHY,TakedaY,ImanishiN,etal.Ferroelectricmaterialsasaceramicfillerincompoeitepolyethyleneoxide basedelectrolytes[J].Electrochem.Soc.,2000,147(7):2462～2467.
