材料科学
共聚物
高分子化学
离聚物
离子电导率
丙烯酸酯
电解质
聚合物
甲基丙烯酸酯
热稳定性
锂(药物)
甲基丙烯酸甲酯
化学工程
化学
复合材料
电极
物理化学
内分泌学
工程类
医学
作者
Takayuki Kawazoe,Kei Hashimoto,Yuzo Kitazawa,Hisashi Kokubo,Masayoshi Watanabe
标识
DOI:10.1016/j.electacta.2017.03.125
摘要
Polymer electrolytes containing solvate ionic liquids (SILs) with increased toughness for use in lithium secondary batteries were designed by utilizing the self-assembly of ABA-type ionomer triblock copolymer, where the A-blocks are ionomers having strong intermolecular coulombic interactions. The ABA-type triblock copolymer, poly(lithium acrylate-r-acrylic acid)-b-poly(methyl methacrylate)-b-poly(lithium acrylate-r-acrylic acid) (P(LiA-r-AA)-b-PMMA-b-P(LiA-r-AA), denoted LML), was synthesized and used as the polymer electrolytes host matrix. The fundamental properties, such as rheological, mechanical, and electrochemical properties, were explored for a binary system (ion gel) comprising LML and a hydrophobic ionic liquid. Due to the strong Li+-carboxylate interactions, the tensile fracture energy of the ion gel was greatly enhanced compared to those of conventional block copolymer electrolytes using nonionic polymers, indicating that the use of the ionomer in the A-block contributed to an enhancement in the tensile strength. Furthermore, the polymer electrolytes prepared with SILs showed good Li+-conductivity and thermal stability. Electrochemical potential window of the polymer electrolytes, revealed by voltammetry, demonstrated their oxidation stability up to 4.5 V vs. Li/Li+ and reversible lithium deposition and dissolution.
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