文档名：锂电池用芳纶涂覆隔膜的制备及其性能
摘要：氮气气氛下,以对苯二胺、对苯二甲酰氯为单体,N-甲基吡咯烷酮为溶剂,氯化钙为助溶剂,合成了对位芳纶聚合物胶液.将芳纶胶液(固含量5%)和氧化铝(Al2O3)加入到N-甲基吡咯烷酮,进行高速分散,得到芳纶涂布液,将涂布液涂覆在聚乙烯多孔基材上,通过浸渍相反转的方法得到锂离子电池用芳纶涂覆隔膜.在芳纶基体中加入成核剂无机Al2O3后,能够促进异相成核,降低孔成核所需克服的自由能垒,增大相分离过程中成孔概率.结果表明,涂层中Al2O3的含量增大时,表面纤维致密性降低,孔尺寸增大,孔数量增多.当Al2O3与芳纶的质量比由1∶2变为5∶1时,单位涂层厚度Gurley值由33(s/100cm3)/μm减小至10(s/100cm3)/μm(减小了69.7%),透气度提升明显.当Al2O3与芳纶的质量比为1∶2时,热针刺面积由纯PE膜的6.22mm2减小至0.36mm2,相较于PE膜减小了94.21%,与此同时,130℃下芳纶隔膜的热收缩率也相应减小,表明使用芳纶涂覆PE膜能够提升PE膜在锂电池中使用过程中的安全性能.
Abstract：P-phenylenediamineandp-phenyldimethylchlorideweretookasthemonomers,N-methylpyrrolidonewasemployedasthesolvent,whilecalciumchloridewasservedasaco-solvent,theparaaramidpolymeradhesivesolutionwassynthe-tizedunderanitrogenatmosphere.Aramidadhesivesolution(solidcontentof5%)andalumina(Al2O3)wereaddedtoN-methylpyrrolidonetoobtainaramidcoatingsolutionbyhighspeeddispersion,thenthecoatingliquidwascoatedonthepolyethyl-eneporoussubstrateandthearamidcoatingseparatorforlithiumionbatterywaspreparedbyaphaseinversionmethod.Theincorpo-rationofinorganicAl2O3asanucleatingagentintothearamidfibermatrixfacilitatesheterogeneousnucleation,andreducesthefreeenergybarrierrequiredforporeformation,andenhancestheprobabilityofporegenerationduringphaseseparation.Theresultsshowthatwithconstantlyincreasingofaluminacontentinaramidcoating,thefibercompactnessonthesurfacedecreases,theporesizeandnumberofporesincreases.WhenthemassratioofAl2O3toaramidchangesfrom1∶2to5∶1,theGurleyvalueperunitcoatingthicknessalsograduallydecreasesfrom33(s/100cm3)/μmto10(s/100cm3)/μm(decreasesby69.7%),airpermeabilityisimprovedsignificantly.WhenthemassratioofAl2O3toaramidis1∶2,thethermalnailpenetrationareaofthearamid-coatedsepara-tordecreasesfrom6.22mm2inthepurePEseparatorto0.36mm2,representingareductionof94.21%comparedtothatofthePEseparator.Additionally,thethermalshrinkagerateofthearamidcoatingseparatorat130℃isalsominimized,furtherindicatingthattheuseofaramidforcoatingPEseparatorcanimprovethesafetyperformanceofPEseparatorduringuseinlithiumbatteries.
作者：刘杲珺 白耀宗 马平川 高飞飞 杜敬然 颜廷国Author：LIUGaojun BAIYaozong MAPingchuan GAOFeifei DUJingran YANTingguo
作者单位：中材锂膜有限公司,山东枣庄277500
刊名：工程塑料应用 ISTICPKU
Journal：EngineeringPlasticsApplication
年，卷(期)：2024, 52(6)
分类号：TQ323.3
关键词：锂电池 隔膜 芳纶 孔结构 热针刺面积
Keywords：lithiumbattery separator aramid porestructure thermalnailpenetrationarea
机标分类号：TQ342.722O631TM912.9
在线出版日期：2024年7月22日
基金项目：中国建材集团攻关专项锂电池用芳纶涂覆隔膜的制备及其性能[
期刊论文] 工程塑料应用--2024, 52(6)刘杲珺 白耀宗 马平川 高飞飞 杜敬然 颜廷国氮气气氛下,以对苯二胺、对苯二甲酰氯为单体,N-甲基吡咯烷酮为溶剂,氯化钙为助溶剂,合成了对位芳纶聚合物胶液.将芳纶胶液(固含量5%)和氧化铝(Al2O3)加入到N-甲基吡咯烷酮,进行高速分散,得到芳纶涂布液,将涂布液涂覆在聚...参考文献和引证文献
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