Preparation, mechanical properties, and electrochemical characterization of polymer gel electrolytes prepared from poly(alkylene oxide) macromonomers
Preparation, mechanical properties, and electrochemical characterization of polymer gel electrolytes prepared from poly(alkylene oxide) macromonomers
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DOI：
10.1149/1.1391817
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发表时间：
1999-05-01
影响因子：
3.9
通讯作者：
Watanabe, M
中科院分区：
文献类型：
--
作者：
Kono, M;Hayashi, E;Watanabe, M
为了应用于聚合物凝胶电解质基质，人们专门设计并系统地合成了各种大分子单体。选择聚（环氧烷）作为聚合物主链，并将其链端改性以形成丙烯酰基。凝胶电解质的制备是通过交联溶解在1 mol/L的LiClO 4在碳酸丙烯酯的液体电解质的大分子单体。详细研究了凝胶电解质的力学性能和电化学性能。拉伸强度、断裂伸长率和剪切模量的测量结果表明，在聚合物凝胶电解质中进行了有利的交联反应。交联的大分子单体膜表现出优异的溶胀特性的液体电解质的吸收，这导致稳定的液体保留。在保持足够的机械强度的同时获得了高的离子电导率，反映了液体吸收过程的稳定性。通过循环伏安法测量确定的凝胶电解质的电位稳定窗口高达4.5V（相对于Li/Li+）。(C)1999年电化学学会。S0013-4651（98）08-088-4。All rights reserved.
Various kinds of macromonomers have been specially designed and systematically synthesized for their application to polymer gel electrolyte hosts. Poly(alkylene oxide) was selected for the polymer backbone, and its chain ends were modified to form acryloyl groups. The gel electrolytes were prepared by cross-linking the macromonomers dissolved in a liquid electrolyte of 1 mol/L LiClO4 in propylene carbonate. Mechanical and electrochemical properties of the gel electrolytes were explored in detail. The results of tensile strength, elongation at break, and shear modulus measurements suggested that a favorable cross-linking reaction proceeded in the polymer gel electrolytes. Cross-linked macromonomer films showed excellent swelling characteristics for liquid-electrolyte uptake and this led to stable liquid retention. High ionic conductivity was attained while keeping sufficient mechanical strength, reflecting stability of the liquid uptake process. The potential stability windows of the gel electrolytes, determined by cyclic voltammetry measurements, were as high as 4.5 V vs. Li/Li+. (C) 1999 The Electrochemical Society. S0013-4651(98)08-088-4. All rights reserved.