Yang Jiahui, Zhou Chengxi, Xiang Yiquan, Bi Yilong, Tan Xinyi, Robertson Alex W, Cheng Yuanfu, Sun Zhenyu
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing Key Laboratory of Environmental Science and Engineering, Beijing, 100081, P. R. China.
ChemSusChem. 2025 Jul 17;18(14):e202500384. doi: 10.1002/cssc.202500384. Epub 2025 May 21.
The all-iron redox flow battery (AIRFB) has garnered significant attention in the field of energy storage due to its advantages of cost, aqueous chemistry, safety, and sustainability. The traditional deposited AIRFB has a limited depth of discharge and is prone to metal dendrite growth and hydrogen evolution side reactions during operation. In contrast, the all-soluble AIRFB, where the active substances are all fully soluble, offers flexible operation that is more conducive to industrial development of AIRFB. However, the all soluble AIRFB electrolyte still requires improvement of its solubility, long-term stability, reactivity, and electrode potential. This review introduces the concepts for modification of the AIRFB electrolyte and presents the main ideas and methods for electrolyte improvement, as well as the challenges faced and possible research directions for the future.
