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一个防火的金属电池通过智能气体管理

Jun-Chen Guo¹, Cong-Zheng Chai^1,2, Ya-Hui Wang^1,2

¹Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.

Proceedings of the National Academy of Sciences of the United States of America

|July 14, 2025

概括

本研究介绍了使用阻燃接口 (FRI) 提高金属电池安全性的智能气体管理策略. FRI通过抑制气体演变和减轻可燃性来防止热失控,确保更安全的高能电池.

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:

(Li) 金属电池具有高能量密度,但存在气体演变和热失控等安全问题.
在阳极和阴极的电解质减少不稳定产生易燃气体 (H2,CH4,O2,CO,CO2),导致机械故障和火灾风险.

研究的目的:

制定一个智能气体管理战略,以提高金属电池的安全性.
为了抑制气体的产生,降低易燃性,并减轻热滥用期间内部压力积累.

主要方法:

将阻燃聚合物 (FRP) 纳入阴极,以创建连续阻燃接口 (FRI).
研究FRI在增强阴极热稳定性和抑制阳极气体生成方面的双作用机制.
在热滥用条件下,在0.58Ah的Liidiye NCM811袋式电池中测试该策略.

主要成果:

通过抑制氧气释放和电解质氧化,FRI显著提高了阴极的热稳定性.
FRP元件释放了阻燃基,在阳极中断了可燃气体的产生.
在100%的充电状态下,在热虐待下,在一个Liidiye NCM811袋式电池中证明了零热逃跑.

结论:

智能气体管理策略有效地防止了金属电池中的热失控.
这种方法与制造工艺兼容,为更安全的高能量密度电池提供了可扩展的解决方案.
为电动汽车和能源存储的防火金属电池提供了一个有前途的途径.

关键词:

阻燃剂是一种阻燃剂.气体进化过程中的气体演变高阴极是高的阴极.金属电池的金属电池是什么热安全性热安全性

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