Redox flow batteries (RFBs) are gaining significant attention due to the growing demand for sustainable energy storage solutions. In contrast to conventional aqueous vanadium RFBs, which have a restricted voltage range resulting from the use of water and vanadium, the utilization of redox-active organic molecules (ROMs) as active materials broadens the range of applicable liquid media to include non-aqueous electrolyte solutions. The extended voltage range of non-aqueous media, exceeding 2 V, facilitates the establishment of high-energy storage systems. Additionally, considering the higher cost of non-aqueous solvents compared to water, the objective in developing non-aqueous electrolyte solution-based organic RFBs (NRFBs) is to efficiently install these systems in a compact manner and explore unique applications distinct from those associated with aqueous RFBs, which are typically deployed for grid-scale energy storage systems. This review presents recent research progress in ROMs, electrolytes, and membranes in NRFBs. Furthermore, we address the prevailing challenges that require revolution, encompassing a narrow cell voltage range, insufficient solubility, chemical instability, and the crossover of ROMs. Through this exploration, the review contributes to the understanding of the current landscape and potential advancements in NRFB technology and encourages researchers and professionals in the energy field to explore this emerging technology as a potential solution to global environmental challenges.

中文翻译：

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非水电解质溶液中的有机氧化还原液流电池


由于对可持续储能解决方案的需求不断增长，氧化还原液流电池 （RFB） 受到广泛关注。与传统的钒水基 RFB 相比，由于使用水和钒而具有有限的电压范围，而使用氧化还原活性有机分子 （ROM） 作为活性材料拓宽了适用液体介质的范围，包括非水电解质溶液。非水介质的扩展电压范围超过 2 V，有助于建立高能量存储系统。此外，考虑到非水性溶剂的成本高于水，开发基于非水性电解质溶液的有机 RFB （NRFB） 的目标是以紧凑的方式高效安装这些系统，并探索不同于与水性 RFB 相关的独特应用，水性 RFB 通常部署在电网规模的储能系统中。本文介绍了 NRFBs 中 ROMs、电解质和膜的最新研究进展。此外，我们还解决了需要革命的普遍挑战，包括电池电压范围窄、溶解度不足、化学不稳定性和 ROM 的交叉。通过这种探索，该审查有助于了解 NRFB 技术的现状和潜在进步，并鼓励能源领域的研究人员和专业人士探索这项新兴技术作为应对全球环境挑战的潜在解决方案。