首页> 外文期刊>International Journal of Electrochemical Science >Modification of Lithium Ion Battery Separators by Electron Beam Radiation Induced Grafting of Glycidyl Methacrylate onto Porous PP Film
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Modification of Lithium Ion Battery Separators by Electron Beam Radiation Induced Grafting of Glycidyl Methacrylate onto Porous PP Film

机译:电子束辐射诱导甲基丙烯酸缩水甘油酯接枝到多孔PP膜上对锂离子电池隔膜的改性

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In order to modify porous polypropylene (PP) film which is used as separator of lithium ion battery,monomers glycidyl methacrylate (GMA) with epoxy groups were grafted onto porous PP film byelectron beam induced pre-irradiation technology. Firstly, the influences of reaction conditions such asconcentration of monomer, absorbed dose and temperature on grafting yield were carried out.Secondly, the prepared graft copolymers PP-g-GMA were assembled to Lithium ion battery to makeclear the influence of modification of PP film on the property of Lithium ion batteries. Theperformance test of Lithium ion battery showed that battery assembled with the grafted PP of graftingyield 68.4% exhibited higher capacity and better cycling performance. Grafted PP with differentgrafting yield was characterized by FTIR and differential scanning calorimetry technique. All resultsfurther confirmed modification of porous PP film. The research provided a facile and effective way forintroducing poly glycidyl methacrylate (PGMA) chains onto PP film. Compared to the original PPseparators, the grafting of PGMA chains onto PP improved the affinity between the grafted PP andliquid electrolyte, which benefited the increase of separators performances.
机译:为了对用作锂离子电池隔膜的聚丙烯多孔膜进行改性,采用电子束诱导的预辐照技术将具有环氧基的单体甲基丙烯酸缩水甘油酯(GMA)接枝到聚丙烯多孔膜上。首先,研究了单体浓度,吸收剂量和温度等反应条件对接枝产率的影响;其次,将制备的接枝共聚物PP-g-GMA组装到锂离子电池中,以明确PP膜的改性对接枝率的影响。锂离子电池的性能。锂离子电池的性能测试表明,与接枝PP接枝的电池,接枝收率为68.4%,表现出更高的容量和更好的循环性能。采用FTIR和差示扫描量热法对接枝后的PP进行了表征。所有结果进一步证实了多孔PP膜的改性。该研究为将聚甲基丙烯酸缩水甘油酯(PGMA)链引入PP薄膜提供了简便有效的方法。与原始的PP分离器相比,PGMA链在PP上的接枝提高了接枝PP与液体电解质之间的亲和力,这有利于隔板性能的提高。

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