简介:InordertocontrolthesizeanddistributionofthehighconductiveFe2PinLiFePO4/Fe2Pcomposite,twodifferentcoolingrates(Fast:15℃·min-1,Slow:2℃·min-1)wereemployedaftermechanicalalloying.Thedischargecapacityofthefastcooledwas83mAh·g-1andtheslowcooled121mAh·g-1.TheparticlesizeofthesynthesizedpowderwasexaminedbytransmissionelectronmicroscopyanddistributionofFe2Pwascharacterizedusingscanningelectronmicroscopy(SEM).Inaddition,two-stepheattreatmentwascarriedoutforbetterdistributionofFe2P.X-raydiffraction(XRD)andRietveldrefinementrevealthatLiFePO4/Fe2Pcompositeconsistsof95.77%LiFePO4and4.33%ofFe2P.
简介:TheelectrochemicalbehaviorofCu-Zn-Alshapememoryalloy(SMA)withandwithoutelectrolessplatedNi-PwasinvestigatedbyelectrochemicalmethodsinartificialTyrode'ssolution.TheresultsshowedthatCu-Zn-AlSMAengendereddezincificationcorrosioninTyrode'ssolution.TheanodicactivecurrentdensitiesaswellaselectrochemicaldissolutionsensitivityoftheelectrolessplatedNi-PCu-Zn-AlSMAincreasedwithNaClconcentrationrising,pHofsolutiondecreasingandenvironmentaltemperatureuprising.X-raydiffractionanalysisindicatedthataftersurfacemodificationbyelectrolessplatedNi-P,anamorphousplatedfilmformedonthesurfaceofCu-Zn-AlSMA.ThisfilmcaneffectivelyisolatematrixmetalfromcorrosionmediaandsignificantlyimprovetheelectrochemicalpropertyofCu-Zn-AlSMAinartificialTyrode'ssolution.
简介:1IntroductionTherareearthcobaltalloyshavethepotentialformakingthemagneticandmagnetoopticalmaterials.Sofar,therareearthcobaltalloyfilmsaresubstantiallyproducedbysputteringorvacuumplating.Ifsuchfilmsarepreparedbyelectrodepositioninstead,productionefficiencywouldbeimprovedandthecompositionofthealloycouldbecontrolled.Becausetheoxidationreductionpotentialsofrareearthelementsareverynegative,organicsolventsmaybeusedaselectrolyticmedia.ElectrodepositionofGdCoandSmCoinorganicsolutionshasbeenreporte...