制造可扩展的共价有机框架膜式电解质,用于固态金属电池
Tongtong Liu1, Yuan Zhong1, Zhiwei Yan2
1Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China.
Angewandte Chemie (International ed. in English)
|August 13, 2024
概括
研究人员开发了可扩展的共价有机框架膜 (COMs) 用于固态金属电池. 这些带有聚乙烯甘醇 (PEG) 链的膜增强了离子运输和电池性能.
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:
- 基于常规的共价有机框架 (COF) 的电解质通常是粉末,需要对固体电解质片进行压缩,阻碍大规模制造.
- 开发可扩展和高效的固体电解质对于推进固态金属电池至关重要.
研究的目的:
- 提出一个可扩展的电策略,用于制造固态电解质的自承载COF膜 (COM).
- 研究这些新型COMs的离子导电特性和电化学性能.
主要方法:
- 用聚乙烯甘醇 (PEG) 链集成的COF膜的电.
- 使用电化学方法和固态7Li NMR的离子导电性和Li+运输机制的表征.
- 组装和测试固态对称的LiidiyeLi,LiidiyeLFP和袋式电池.
主要成果:
- 开发的PEG-COM电解质具有高离子导电性 (30°C时0.153毫秒/厘米) 和增强的树抑制.
- 改善的Li+导电归因于松散的离子配对和更高的自由Li+含量,促进了方向离子运动.
- 固态电池在60°C时表现出极好的电化学性能.
结论:
- 电战略为可扩展的基于COM的电解质制造提供了一种通用方法.
- 这些可扩展的COM为固态金属电池的实际应用提供了有希望的途径.
- 该研究推动了高性能,可制造的固态电池电解质的开发.
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