不易燃的多化物定准固体电解质,用于超安全的无阳极囊电池,无热逃逸
Anjun Hu1,2, Wei Chen1, Fei Li1
1State Key Laboratory of Electronic Thin Film and Integrated Devices, School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Advanced materials (Deerfield Beach, Fla.)
|September 5, 2023
概括
这项研究引入了一种新的不可燃性准固体电解质,用于更安全的可充电电池. 这种新材料可以防止金属电池中的热失控,从而提高实际应用的安全性.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 可充电电池,特别是那些使用金属 (Li) 阳极的电池,由于易燃的有机电解质,构成火灾风险.
- 在恶劣的条件下,热失控是一个重大的安全问题.
研究的目的:
- 开发一种非易燃的准固体电解质,以确保金属电池的安全运行.
- 为了提高无阳极金属袋细胞的安全性.
主要方法:
- 采用了在现场封装策略,使用了六卜烯酸盐 (HFBA) 和五乙四烯酸盐 (PETEA) 的基性聚合.
- 准固体电解质在没有阳极的金属电池中进行了测试,采用Au-修改的减少氧化石墨烯电流采集器和硫化阴极.
主要成果:
- 准固体电解质的自我灭时间为零,这是由于HFBA的激素捕获能力.
- PETEA分解形成了石墨化的碳层,抑制了燃烧.
- 组装的无阳极的金属电池没有显示电池扩张或气体生成,并且在各种滥用条件下消除了热失控.
结论:
- 开发的非易燃准固体电解质提供了强大的气体和凝结相阻燃机制.
- 这项技术代表了无阳极的金属袋式电池的安全实践应用的重大进步.
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