通过无形冷凝结构和多个Li运输通道传导具有高离子导电性的复合聚合物固态电解质
Yueshan Li1, Weihao Yuan1, Fei Lu1
1School of Chemistry and Chemical Engineering, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin, 150006, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 29, 2024
概括
研究人员开发了一种无形聚合物电解质,以提高离子导电性. 这种新材料提高了电池的性能和稳定性,克服了传统聚合物电解质的局限性.
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:
- 传统的聚乙烯氧化物 (PEO) 电解质具有高结晶性,阻碍Li+离子运输,导致离子导电性差,加工复杂.
- 当前聚合物电解质的局限性阻碍了有效的离子传输,影响了电池的整体性能和可扩展性.
研究的目的:
- 设计和合成一种无形聚合物电解质 (p-电解质),具有增强的离子导电性和广泛的电化学窗口.
- 通过结合Cu-BTC MOF和LLZTO纳米颗粒来构建一个现场可固化的复合聚合物电解质 (CPE-L),以改善Li+运输.
- 评估离子电池中开发的聚合物电解质的电化学性能和稳定性.
主要方法:
- 一种有凝结结构的无形聚合物电解质的合成.
- 纳入铜 (II) -1,3,5-三碳酸 (Cu-BTC) 金属有机框架 (MOF) 和,,氧化 (LLZTO) 的纳米粒子.
- 制造和测试Li的电池ECPE-L的电池ECPELi对称电池和全电池.
主要成果:
- 无形的p电解质具有广泛的电化学窗口 (4.2V) 和高离子导电性 (1.58 × 10−5 S cm−1),明显超过传统的PEO电解质.
- 复合聚合物电解质 (CPE-L) 由于协同效应,具有显著的离子导电性 (1.02 × 10−3 S cm−1) 和高的Li+转移数 (0.58).
- 立即下载的CPE-L立即下载Li对称电池显示稳定循环超过700小时,充满电池达到约153 mAhg-1.1的特定容量.
结论:
- 开发的无形聚合物电解质和随后的复合结构提供了高效的Li+运输通路,解决了传统材料的局限性.
- 在聚合物矩阵中Cu-BTC MOF和LLZTO纳米粒子的协同集成导致了优越的离子导电性和电化学稳定性.
- 这种先进的聚合物电解质设计对高性能和稳定的离子电池应用具有重大前景.
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