用于高性能固态金属电池的单离子导电聚合物基复合电解质
Kaihua Wen1, Shundong Guan1, Sijie Liu1
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 30, 2023
概括
本研究介绍了先进的单离子导电聚合物电解质 (CPE) 与 (Li) 石榴石,用于高性能固态电池. 这些新型CPE实现了卓越的离子导电性和稳定性,为下一代储能铺平了道路.
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
- 聚合物科学 聚合物科学
背景情况:
- 复合聚合物电解质 (CPE) 结合了聚合物和无机电解质,以提高性能.
- 传统的双离子CPE存在低 (Li) 离子转移数,限制了电池效率.
- 开发单离子导电电解质对于改善离子运输至关重要.
研究的目的:
- 为固态金属电池合成和描述新型单离子导电CPE (SIPC-LLZTO).
- 提高CPE的离子转移数和电化学性能.
- 评估使用这些先进的电解质的电池的长期循环稳定性和性能.
主要方法:
- 合成的单离子导电CPE使用单离子聚合物导体 (SIPC) 矩阵和Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 陶填充剂.
- 描述了电化学特性,包括离子导电性,离子转移数和电化学稳定性窗口.
- 使用开发的CPEs制造并测试了具有LiFePO4和LiCoO2阴极的固态金属电池.
主要成果:
- 在SIPC-LLZTO CPEs中实现了高的离子转移数 (高达0.96).
- 证明了高室温离子导电性 (>1.0 × 10^-4 S cm^-1) 和广泛的电化学稳定性窗口 (>5.0 V).
- 在金属中表现出优异的长期循环稳定性 (3200小时),在固态电池中提供高容量.
结论:
- 开发的单离子导电CPE为高性能固态金属电池提供了一个有希望的途径.
- SIPC-LLZTO复合电解质显著改善了离子运输和电池稳定性.
- 这项研究有助于推进下一代储能解决方案的发展.
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