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《電池隔膜論文：等離子體磺化處理堿性二次電池隔膜的研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、電池隔膜論文：等離子體磺化處理堿性二次電池隔膜的研究【中文摘要】本課題利用低溫等離子體表面改性技術(shù)和磺化技術(shù)對堿性二次電池隔膜進(jìn)行改性處理,分別研究了等離子體引發(fā)濃硫酸磺化、等離子體引發(fā)發(fā)煙硫酸磺化、等離子體引發(fā)混合溶液磺化三種不同改性方法對丙綸隔膜的處理效果。分別對丙綸隔膜原樣、直接磺化樣品、等離子體引發(fā)磺化樣品進(jìn)行相關(guān)性能測試,系統(tǒng)地研究了各種處理方法所相關(guān)的實(shí)驗(yàn)參數(shù)(磺化溫度、磺化時(shí)間、磺化濃度等)對電池隔膜改性效果的影響,并對隔膜表面的化學(xué)組成和形態(tài)結(jié)構(gòu)使用紅外光譜、XPS、掃描電鏡等儀器手段進(jìn)行了表征分析。實(shí)驗(yàn)結(jié)果表明,通過以上三種改
2、性手段,都可以在丙綸(PP)隔膜表面引入磺化基團(tuán),從而改善親水性能、吸堿性能及面電阻。其中:等離子體引發(fā)濃硫酸磺化后,PP隔膜的接觸角從90°下降到25°,說明親水性能明顯改善;等離子體引發(fā)發(fā)煙硫酸磺化,PP隔膜的爬高可以達(dá)到7.9cm(5min),吸堿量可以達(dá)到272%;等離子體引發(fā)混合溶液磺化,爬高可以達(dá)到7.6cm(5min),吸堿量可以達(dá)到266%。三種手段改性處理后隔膜面電阻也分別下降了32倍,80倍和65倍;同時(shí)不會(huì)對隔膜的力學(xué)性能有太大的影響。比較各種處理?xiàng)l件對電池隔膜性能的綜合影響表明:在反應(yīng)溫度90℃,反應(yīng)時(shí)間3min,混合溶
3、液濃度為16.6%的條件磺化可以使電池隔膜性能得到大幅改善,同時(shí)又很好地兼顧了生產(chǎn)成本?！居⑽恼縏hesurfaceofpolypropylenefilmwasmodifiedbycoldplasmatreatmentforalkalisecondarybatteryseparator,whichispolypropylene(PP)separator,inthispaper.Thesurfacetreatmentwascarriedoutusingthreedifferentmethods,suchasplasmainitiateconc
4、entratedsulfuricacidsulfonation,plasmainitiatefumingsulfuricacidsulfonationandplasmainitiatemixturesulfonation,andthetreatmenteffectsinbatteryseparatorwerestudied.TherelatedperformanceoforiginalPPseparator,directsulfonationPPseparatorandplasmainitiatingsulfonationPPseparator
5、wastested,andtheinvolvedtreatmentparametersofthreemethodsabove,includingsulfonationtemperature,sulfonationtime,sulfonationconcentrationetc,werestudiedsystematically.Equally,IR,XPSandSEMwereusedtocharacterizethesurfacepropertiesofthesamplessuchaschemicalcompositionandmorpholo
6、gicalstructureofmaterialsurface.ResultsrevealthatsulfonicacidgroupsweresuccessfullyintroducedontothesurfaceofPPseparatorusingthosethreemethodsmentionedabove,thenseparator’shydrophilicity,alkaliabsorptionandmembranesurfaceresistancehavebeenimproved.Themembranecontactanglechan
7、gedfrom90°to25°whenoriginalPPseparatorwastreatedusingplasmainitiatingconcentratedsulfuricacidsulfonation.Whenusingplasmainitiatingfumingsulfuricacidsulfonation,thealkaliabsorptionvelocityandquantityofreached7.2cm(5min)and272%,respectively.However,thealkaliabsorptionvelocitya
8、ndquantitycouldattain7.6cm(5min)and266%,respectively,whenplasmainitiatingmi
