超分子聚合物离子导体与减弱的离子溶解使室温可行 全固态金属电池
Hang-Yu Zhou1,2, Yu Ou1, Shuai-Shuai Yan1
1Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.
Angewandte Chemie (International ed. in English)
|July 6, 2023
概括
这项研究引入了一种新型的高分子聚合物离子导体,可以在低温下实现全固态金属电池 (ASSLMB) 的稳定循环. 材料 材料 的材料.
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:
- 全固态金属电池 (ASSLMBs) 需要提高耐用性,接口稳定性和室温性能.
- 金属/电解质接口的高接口电阻阻碍了ASSLMB循环,特别是在30°C以下.
- 同时在ASSLMB中实现所需的属性仍然是一个重大挑战.
研究的目的:
- 开发一种固体聚合物电解质,减轻ASSLMB的界面电阻.
- 为了使ASSLMB在降低温度下稳定运行,接近室温.
- 探索离子传输的固体聚合物电解质中结合化学的应用.
主要方法:
- 合成一种超分子聚合物离子导体 (SPC),利用素结合相互作用.
- 添加1,4-二四子和乙烯氧化物部分,以创建Li+离子的"弱溶解".
- 描述SPC的离子导电性,Li+转移数,以及与金属的界面特性.
主要成果:
- 产品简介展示了由于素结合导致的O-Li+协调减弱,促进了快速的Li+运输和高的转移数.
- 在金属表面形成一个独特的Li2O丰富的固体电解质介相 (SEI),显著降低接口电阻.
- 稳定的ASSLMB循环可以达到10°C,在降低温度下表现出更好的性能.
结论:
- 开发的SPC有效地解决了ASSLMB的界面阻力挑战.
- 通过素结合实现的弱Li+溶解对于在室温下高性能固体聚合物电解质至关重要.
- 这项工作突出了素结合化学在设计下一代电池的先进固态电解质方面的潜力.
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