通过设计化学单体结构来影响离子液体聚合物电解质的离子导电性和机械性能
Lisa Ehrlich1,2, Doris Pospiech1, Petra Uhlmann1
1Department Polymer Structures, Leibniz-Institut für Polymerforschung Dresden e.V, Dresden, Germany.
Designed monomers and polymers
|October 16, 2023
概括
新的聚合物网络有效地导出化物离子,显示电池电解质的前景. 它们的导电性在水膨胀后显著改善,并在350个循环中表现出稳定的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 离子液体单体对于开发先进的电解质至关重要.
- 与液体电解质相比,聚合物离子导体提供了更好的机械稳定性和可加工性.
研究的目的:
- 合成和描述聚合物单离子导体网络.
- 研究化学结构对热,,膨胀和离子导电性质的影响.
- 评估这些聚合物网络作为电池电解质的潜力.
主要方法:
- 合成亚克力化物离子液体单体 (AACXImCYCl) 的合成,并将其聚合成网络.
- 聚合物网络的特征使用热分析,风病学和胀研究.
- 在不同温度下和在水中膨胀后测量离子导电性.
- 在350个充放电周期的p ((TEMPO-MA) /电池中测试聚合物电解质.
主要成果:
- 离子导电性随着温度的增加增加两个数量级 (10−6到10−4 S·cm-1),并在水膨胀后达到10−2 S·cm−1.
- 交叉连接剂含量与玻璃过渡温度 (Tg) 和粘度正相关.
- 间距长度影响Tg (较短的间距增加Tg) 和粘度 (较长的间距随温度增加粘度).
- 经过成功的长期循环 (350个循环) p{TEMPO-MA) /电池证明了该材料作为电解质的适用性.
结论:
- 聚合物单离子导体的化学结构显著影响其性能.
- 这些材料在电池应用中表现出有希望的离子导电性和电化学稳定性.
- 这些聚合物网络的调节性质使得它们适用于储能设备的多功能.
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