共聚物
电解质
锂(药物)
材料科学
聚合
化学工程
离子电导率
离子键合
电导率
高分子化学
聚合物
化学
离子
复合材料
有机化学
电极
物理化学
医学
工程类
内分泌学
作者
Fuming Wang,Hung-Chun Wu,Chih Chia Cheng,Cheng‐Liang Huang,Chang-Rung Yang
标识
DOI:10.1016/j.electacta.2009.01.072
摘要
Hyperbranched network-based gel copolymer electrolytes are synthesized by in situ free radical polymerization. This research is separated into two parts: the first is an investigation of modified bismaleimide oligomer (MBMI) as a free volume additive, and the second investigates the salt concentration effect on high power application. A polymer electrolyte with MBMI additive provided more free volume space, and the ionic conductivity of gel copolymer electrolytes was measured as a function of the salt concentration of lithium hexafluorophosphate (LiPF6). The highest ionic conductivity and the lowest activation energy of hyperbranched-network gel copolymer electrolytes were determined to be 7.72 × 10−3 S/cm at 23 °C and 5.41 kJ/mol, respectively. Furthermore, the MBMI additive and the optimal concentration of lithium salt increased the free space for carrier ions and contributed to increasing capacity and working voltage at a high rate discharge (8C). The reliability and cycling ability of lithium polymer batteries are as good as lithium ion batteries for potential electric vehicle (EV) application.
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