4.8 Article

Viologen Hydrothermal Synthesis and Structure-Property Relationships for Redox Flow Battery Optimization

期刊

ADVANCED ENERGY MATERIALS
卷 -, 期 -, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202203919

关键词

flow batteries; organic redox species; TEMPO; viologen

向作者/读者索取更多资源

Aqueous organic redox flow batteries (AORFBs) are a promising technology for safe grid energy storage. However, designing organic redox molecules with desired properties while remaining scalable is challenging. This study demonstrates the adaptability of a single-step hydrothermal reaction for nine viologen chloride salts and offers new insights into structure-property relationships. A new Dex-DiOH-Vi derivative with enhanced solubility and stability exhibits stable cycling performance in anolyte-limiting AORFB. This work highlights the importance of efficient synthetic approaches for high-performance flow battery electrolytes.
Aqueous organic redox flow batteries (AORFBs) are an emerging technology for fire safe grid energy storage systems with sustainable material feedstocks. Yet, designing organic redox molecules with the desired solubility, viscosity, permeability, formal potential, kinetics, and stability while remaining synthetically scalable is challenging. Herein, the adaptability is demonstrated of a single-step, high-yield hydrothermal reaction for nine viologen chloride salts. New empirical insights are gleaned into fundamental structure-property relationships for multiobjective optimization. A new asymmetric Dex-DiOH-Vi derivative showcases an enhanced solubility of 2.7 m with minimal tradeoff in membrane permeability. With a record viologen cycling volumetric capacity (67 Ah L-1 anolyte theoretical), Dex-DiOH-Vi exhibits 14-d of stable cycling performance in anolyte-limiting AORFB with no crossover or chemical degradation. This work highlights the importance of designing efficient synthetic approaches of organic redox species for molecular engineering high-performance flow battery electrolytes.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据