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  • Effect of polyimide binder on electrochemical characteristics of surface-modified silicon anode for lithium ion batteries

    聚酰亚胺粘结剂对锂离子电池表面改性硅阳极电化学性能的影响

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    标签: Silicon Anode Binder Lithium ion battery

    出版日期:2013

    作者单位:aCenterforEnergyConvergence,KoreaInstituteofScienceandTechnology,Hwarangno14-gil5,Seongbuk-gu,Seoul136-791,RepublicofKoreabDepartmentofMaterialScience&Engineering,KoreaUniversity,Seoul136-713,RepublicofKoreacDepartmentofChemicalandBiochemicalEngineering,DonggukUniversity-Seoul,3-26Pil-Dong,Chung-Gu,Seoul100-715,RepublicofKorea
    杂志名称:Journal of Power Sources
    卷号:244
    期数:Complete
    刊号:0378-7753
    出版日期:2013

    简介:SinanostructureswithhighsurfaceareaarepreparedbyAg-assistedchemicaletching,andthenemployedasananodematerialforlithiumionbatteries.Theuseofthesurface-modifiedSi,whichhasfourtimeshighersurfaceareathanitspristinecounterpart,leadstotheenhancementofelectrochemicalperformancecharacteristicssuchasdischargecapacityandcoulombicefficiency.Inordertooptimizetheelectrodeconstituents,twodifferentbinders,poly-vinylidinedifluoride(PVdF)andpolyimide(PI),areevaluatedonthebasisofelectrochemicalandphysicaltests.In-situdilatometerandnano-indentationstudiesduringrepeatedcharginganddischargingcyclesforthedifferentbindersrevealmorestabilityandrecuperativecapabilityagainstphysicalstresswiththePIbinderthanwiththePVdF.Theoptimizedactivestructurecombinedwiththefilm-likebinderplaysanimportantroleinenhancingtheelectrochemicalperformance.

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