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布伦斯特德-洛瑞酸为基础的水性性电解质用于实用电池
Roza Bouchal1, Ibrahim Al Kathemi1, Markus Antonietti1
1Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.
Small (Weinheim an der Bergstrasse, Germany)
|December 3, 2023
概括
一种新型的pH缓冲水性电解质 (AEE) 通过提高组件兼容性来增强电池的稳定性. 这种具有成本效益的战略提高了性能,并解决了水性电池的关键挑战.
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:
- 水性高度电解质 (AHCE) 提高了水性电池 (AZB) 的循环稳定性.
- 基于化物 (ZnCl2) 的AHCE提供了良好的 Zn 阳极稳定性,但遭受酸性pH和离子反应,导致组件不相容.
- 由于材料相互作用,现有的电解质对实际的AZB应用构成挑战.
研究的目的:
- 为提高水性电池性能开发一个pH缓冲的水性电解质 (AEE).
- 为了解决基于ZnCl2的电解质与电池组件的兼容性问题.
- 为AZBs提供一种高效,简单,低成本的电解质策略.
主要方法:
- 使用ZnCl2和酸 (NaAc) 制备一种水性环氧电解质 (AEE),基于布伦斯特德-劳里概念.
- 在较低的盐度下,平衡结相互作用以实现更高的水协调.
- 电解质性质的表征,包括电化学稳定性,运输性质和玻璃过渡温度.
- 测试与氧化瓦纳阴极,电流收集器和纤维素分离器的兼容性.
主要成果:
- 开发的pH缓冲AEE表现出改进的电解质特性:高电化学稳定性,增强的运输和低的玻璃过渡温度.
- 与氧化瓦纳阴极相比,AEE具有优越的兼容性,与和ZnCl2.2相比,其容量保留率提高了50%.
- 与传统的ZnCl2电解质不同,AEE有效地解决了与电流收集器和纤维素分离器的不兼容问题.
- 电解质可以通过优化结合,在较低盐度下实现更高的水协调.
结论:
- 具有pH缓冲的AEE为水性电池电解质提供了重大进步.
- 该策略提供了一种成本效益高且简单的解决方案,以提高AZB性能和组件兼容性.
- 开发的电解质为稳定高效的水性电池的实际应用铺平了道路.
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