消除化通过piperidine-doped分离器稳定金属电池与丰富的阴极
Luoyi Ding1, Yuanmao Chen1, Yeliang Sheng1
1Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Angewandte Chemie (International ed. in English)
|August 30, 2024
概括
一种使用分子 (TW) 与皮佩里丁 (PI) 的新型分离器策略有效地减少高压金属电池 (LMB) 中的酸 (HF). 这种TW@PI-PE分离器通过保护电极和促进均的固体电解质介相,提高了电池的稳定性和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 酸 (HF) 在高压金属电池 (LMB) 中严重降解电极和接口结构.
- 现有的分离器努力减轻高频引起的损害,限制电池性能和寿命.
研究的目的:
- 开发一种新的分离器策略,以抑制高压LMB中高频诱导的降解.
- 通过保护阴极和阳极接口来提高LMB的稳定性和循环寿命.
主要方法:
- 聚乙烯 (PE) 分离器的装饰用分子网 (TW) 浸了 piperidine (PI),以创建TW@PI-PE分离器.
- 利用多孔TW结构作为PI和HF的反应室来清理HF.
- 在金属阳极上研究富含化 (LiF) 的固体电解质间相 (SEI) 的形成.
主要成果:
- TW@PI-PE分离器显著降低了电解质中的HF含量,保护富含的阴极免受蚀刻.
- 在阳极上形成了一个均的LiF丰富的SEI层,有效地抑制了树突的生长.
- 对称Li细胞的寿命翻了一番,达到稳定的500小时循环. 4.6-V LMBs 在100个周期中显示了81%的容量保留.
结论:
- 该TW@PI-PE分离器系统有效地减轻高压LMB中高频诱导的降解.
- 这种创新方法为开发稳定且持久的金属电池提供了一个有前途的战略.
- 该TW@PI系统为未来的研究提供了一个新的视角,重点是消除LMBs中的HF挑战.
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