| 改性对PVDF-HFP聚合物电解质的影响 |
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| 引用本文： | 胡拥军,陈白珍.改性对PVDF-HFP聚合物电解质的影响[J].电源技术,2010,34(2). |
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| 作者姓名： | 胡拥军 陈白珍 |
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| 作者单位： | 1. 湖南城市学院化学与环境工程系,湖南,益阳,413000
2. 中南大学冶金科学与工程学院.湖南,长沙,410083 |
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| 基金项目： | 湖南省自然科学基金重点研究项目(06B0023) |
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| 摘 要： | 将聚偏二氟乙烯-六氟丙烯改性,再与甲基丙烯酸甲酯共聚,然后用相转移法制备P(VDF-HFP/MMA)聚合物电解质,并以LiCoO2为正极制备聚合物锂离子电池。红外光谱分析表明,材料改性及聚合后结构发生变化,扫描电子显微镜法(SEM)显示改性P(VDF-HFP/MMA)聚合物膜呈蜂窝状,吸液后室温离子电导率为2.7mS/cm,电化学稳定窗口为5.3V。充放电对比实验发现,甲基丙烯酸甲酯单元的引入降低了电池的内阻,改善了电池的循环性能,电池0.1C充放电50次后的容量保持率为95.5%。
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| 关 键 词： | 聚合物电解质 锂离子电池 循环性能 阻抗 |
Polymer electrolyte based on modified poly[(vinylidene) fluoride-hexafluoro-propylene/methyl methacrylate] |
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| HU Yong-jun,CHEN Bai-zhen.Polymer electrolyte based on modified poly[(vinylidene) fluoride-hexafluoro-propylene/methyl methacrylate][J].Chinese Journal of Power Sources,2010,34(2). |
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| Authors: | HU Yong-jun CHEN Bai-zhen |
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| Affiliation: | 1. Department of Chemistry;Hunan City University;Yiyang Hunan 413000;China;2. School of Metallurgical Science and Engineering;Central South University;Changsha Hunan 410083;China |
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| Abstract: | Poly(vinylidene) fluoride-hexafluoropropylene was modified and a chemically cross-linked copolymer was obtained by polymerizing modified poly(vinylidene) fluoride-hexafluoropropylene with methyl methacrylate, and then the polymer electrolyte was prepared using phase inversion. IR show that after modification, the structure of poly(vinylidene) fluoride-hexafluoropropylene is changed, and SEM displays that this polymer membrane has a porous structure. After absorbing electrolyte, the polymer electrolyte exhib... |
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| Keywords: | polymer electrolyte Li-ion battery cycling performance impedance |
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