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水性离子电池在广泛的温度范围内提高了稳定性和动力学

Lei Zhang¹, Yu Han¹, Yaheng Geng¹

¹State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, Hunan, China.

Angewandte Chemie (International ed. in English)

|February 22, 2025

概括

这项研究引入了一种新的电解质,用于使用丝纤维素的水性离子电池 (AZIB). 新的电解质可以使电池在广泛的温度范围内保持稳定的性能,从-60°C到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:

可持续的水性离子电池 (AZIBs) 需要广泛的操作温度范围来实现实际应用.
目前的AZIB电解质在平衡低温动力学和高温稳定性方面面临着挑战.
极端温度往往会损害电池性能,限制它们的广泛采用.

研究的目的:

为AZIBs开发一种新的电解质,确保在广泛的温度范围内 (-60至60°C) 确保稳定的运行和高效的动力学.
通过使用多功能添加剂来增强电解质的结构和界面特性.
为了证明开发的电解质在高能量密度囊细胞中的实际可行性.

主要方法:

将丝纤维素作为多功能添加剂加入基于化的"盐中的水"电解质中.
在极端温度 (-60°C和60°C) 下对Zn 半电池的电化学表征.
使用修改过的电解质,制造和测试一个安培小时级ZnidiyeV2O5·nH2O袋式电池.

主要成果:

丝纤维素修饰的电解质在-60°C时表现出低歇斯底里 (180mV在1mA cm−2) 和稳定循环 (200小时在2mA cm−2) 在60°C的半细胞中.
电解质与无机和有机阴极材料兼容.
一个Zn底下下载的V2O5·nH2O袋式电池实现了~72Wh L-1的能量密度,在50个循环中容量衰减最小,在-60°C至60°C稳定运行.

结论:

丝纤维蛋白有效地改变电解质结构和电极界面,解决AZIBs中低温动力学和高温稳定性之间的权衡.
开发的电解质为提高AZIB在极端温度条件下的性能和实用性提供了强大的解决方案.
这一战略为开发可靠且广泛应用的水性金属离子电池带来了重大进展.

关键词:

水性电池的水性电池是什么电极接口的电极接口是什么电解质添加剂的电解质添加剂电解质溶解的电解质溶解方法具有广泛的温度范围.

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