Aqueous redox flow batteries (ARFBs) have emerged as a promising technology for large-scale energy storage, enabling the efficient utilization of intermittent renewable energy sources. Recently, aqueous organic redox flow batteries (AORFBs) have garnered attention due to the metal-free composition of organic molecules, offering favorable characteristics like earth-abundant elements, electrochemical reversibility, and adaptable molecular design. This review focuses on recent progress in using organic redox-active molecules as anolytes in alkaline AORFBs, specifically anthraquinones and phenazines. Molecular engineering strategies are explored to enhance solubility, increase capacity, and improve stability of the organic redox-active molecules. Moreover, the utilization of solid organic substances with high energy density, either as anode active materials or capacity boosters, is outlined and discussed Overall, this review showcases the versatility and prospects of organic redox-active molecules for AORFBs.

中文翻译：

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用于碱性水性氧化还原液流电池的有机氧化还原活性分子

水系氧化还原液流电池（ARFB）已成为一种有前途的大规模储能技术，可以有效利用间歇性可再生能源。最近，水性有机氧化还原液流电池（AORFB）由于有机分子的无金属组成而受到关注，具有地球丰富的元素、电化学可逆性和适应性分子设计等有利特性。本综述重点介绍了使用有机氧化还原活性分子作为碱性 AORFB 阳极电解液的最新进展，特别是蒽醌和吩嗪。探索分子工程策略来提高有机氧化还原活性分子的溶解度、容量和稳定性。此外，概述并讨论了高能量密度固体有机物质作为阳极活性材料或容量增强剂的利用。总的来说，这篇综述展示了 AORFB 有机氧化还原活性分子的多功能性和前景。