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双同溶剂电解质工程,用于在60°C的坚固水性金属电池

Siying Wang¹, Lingjie Long¹, Lilin Chen¹

¹Yanzhao Electric Power Laboratory of North China Electric Power University, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China.

|October 18, 2025

概括

本研究引入了用于水性金属电池 (AZMB) 的混合电解质,以提高高温性能. 新的电解质抑制了水反应,使阳极稳定,电池寿命更长,温度为60°C.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

水性金属电池 (AZMB) 为大规模储能提供了固有的安全性,特别是在高温下.
高温加剧了AZMB中与水有关的副作用,损害了可逆性和循环稳定性.
现有的电解质面临着Zn腐蚀和高温下气演变的挑战.

研究的目的:

开发一种用于高温AZMBs的新型混合电解质.
为了提高阳极在60°C的稳定性和可逆性.
在苛刻的热条件下改善AZMB的整体循环性能和寿命.

主要方法:

在水性电解质中引入双重辅溶剂 - - 三乙烯酸盐和γ-瓦莱洛拉克.
用于高温AZMB应用的混合电解质的制备.
电化学测试不对称的ZndigitalCu和对称的ZndigitalZn电池,以及在60°C的温度下进行完整的电池组装和循环.

主要成果:

混合电解质表现出耐火性,并在60°C时显著抑制了水的反应性.
观察到没有树突的均沉积,确保稳定和可逆的Zn阳极.
不对称的ZnRawZnCu细胞在415个循环中实现了99.4%的共效率;对称的ZnRawZn细胞持续了1354小时;在60°C下550个循环后,完整的细胞保持了77.6%的容量.

结论:

开发的混合电解质有效地提高了AZMB在高温下的性能.
抑制水侧反应和促进均的沉积是提高稳定性的关键.
这种电解质工程策略为高性能,高温的AZMB提供了一个有希望的途径.

关键词:

水性金属电池水性金属电池双同溶剂电解质工程双同溶剂电解质工程混合电解质的混合电解质.三乙烯酸三乙烯酸 γ-valerolactone 的使用情况.

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