高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (7): 1383.

• 研究论文 • 上一篇    下一篇

新型锂离子电池聚合物电解质的制备

任旭梅1, 顾辉2, 陈立泉2, 吴锋1, 黄学杰2   

  1. 1. 北京理工大学化工与材料学院, 北京 100081;
    2. 中国科学院物理研究所, 固态离子实验室, 北京 100080
  • 收稿日期:2000-05-19 出版日期:2002-07-24 发布日期:2002-07-24
  • 通讯作者: 任旭梅(1969年出生),女,博士,从事绿色材料研究.E-mail:Renxumei@263.net E-mail:Renxumei@263.net
  • 基金资助:

    国家863新材料领域项目(批准号:2001AA323032)

Preparation of Polymer Electrolyte for Lithium-ion Battery

REN Xu-Mei1, GU Hui2, CHEN Li-Quan2, WU Feng1, HUANG Xue-Jie2   

  1. 1. School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081, China;
    2. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2000-05-19 Online:2002-07-24 Published:2002-07-24

摘要: 应用倒相法,以PVDF-HFP(偏氟乙烯-六氟丙烯)的混合物为基体制备锂离子电池电解质基质,制得的多孔PVDF基质薄膜具有优良的化学性能及机械性能,其拉伸强度为102kg/cm2,吸附锂离子电池电解液(1mol/LLiPF6的EC/DEC溶液)的能力达到自身重量的350%以上,吸液后其室温电导率在10-3S/cm以上,用它组装成原理电池以后呈现了良好的电化学性能.

关键词: 锂离子电池, 聚合物电解质, PVDF, 倒相法

Abstract: With the final goal of developing lithium ion batteries having a plastic configuration, we have characterized a high conducting microporous PVDFplastic electrolyte for lithium ion batteries prepared by using the phase inversion process. Gel polymer electrolyte composed of PVDF-based microporous membrane, LiPF6-EC/DECshow a high ionic conductivity (above 10-3S/cm at room temperature), and good mechanical properties(102 kg/cm2). The half cells consisting of Li/GPE/MCMBshow excellent cycling characteristics and the stable discharge capacity is 306 mA·h/g. At a current density of 1.0 mA·h/cm2(0.5 C), the cell was shown to retain 79% of initial capacity after 100 cycles.

Key words: Lithium ion battery, Polymer electrolyte, PVDF, Phase inverse

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