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定制离子溶解结构,以提高-流电池的耐用性和效率

Norah S Alghamdi^1,2,3, Dmitrii Rakov^1,4, Xiyue Peng¹

¹Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.

Angewandte Chemie (International ed. in English)

|May 1, 2025

概括

研究人员通过修改离子溶解结构来改进水性-流电池 (ZBFB). 这通过抑制进化和树突来提高大规模储能的耐用性和效率.

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-流电池 (ZBFBs) 提供可扩展,具有成本效益和可持续的能源存储.
对于ZBFB的长期耐用性的关键挑战包括演化反应 (HER) 和树状电.
电解质成分显著影响ZBFB的性能和稳定性.

研究的目的:

通过控制 Zn2+ 离子溶解结构来解决 ZBFB 的耐用性挑战.
研究辅助溶剂添加剂对电解质特性和电化学性能的影响.
为了实现高效和可逆的涂/脱落,同时抑制进化.

主要方法:

在水性 ZnBr2电解质中重塑 Zn²⁺ 溶解结构,使用键接受器辅溶剂添加剂.
分析第一个和第二个Zn2+溶解内的相互作用的作用.
评估低添加剂度对质子捕获,pH稳定和离子传输的影响.

主要成果:

在电过程中,将有机添加剂选择性地纳入第二个Zn²⁺协调外,有效捕获质子并稳定电解质pH.
缓解离子运输阻力,防止电极表面形成被动化相间层.
通过抑制的H2进化实现了高效和可逆的Zn^0/2+涂层/脱落.

结论:

Zn2+溶解结构的精确设计对于调节水性电解质中的反应性和稳定性至关重要.
这种方法通过克服 HER 和树突生长的局限性来提高 ZBFB 的性能.
这些发现为开发商业上可行的高性能ZBFB为电网规模储能铺平了道路.

关键词:

的演化反应反应.树突石的树突石 -流电池 -流电池是一种离子溶解结构的结构

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