2026-04-29T08:40:27Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/61982022-11-22T10:49:23Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

00925njm 22002777a 4500 dc Páez, Teresa author Martínez Cuezva, Alberto author Marcilla, Rebeca author Palma, Jesús author Ventosa Arbaizar, Edgar author 2021-11 Aqueous organic redox flow batteries (AORFBs) have recently been attracting much attention due to their potential utilization as a sustainable solution for stationary energy storage. However, AORFBs have still to face various challenges to become a competitive technology to other mature redox flow batteries. Fading of the energy storage capacity upon cycling leading to insufficient lifetime is likely the most pressing issue. Several processes are contributing to this issue. Among the capacity fading promoters, the existence of side reactions such as water splitting and reactions related to oxygen reduction triggers an imbalanced state of charge for the catholyte and anolyte. Herein, a simple electrochemical balancing procedure is proposed and successfully demonstrated through the restoration of the oxidation states of the two half-cell solutions. The results reveal that it is possible to mitigate and even revert the effects of such side reactions, developing a useful method for mitigating the capacity fading and prolonging the cycling performance of AORFBs. In the two case studies, the implementation of this simple charging procedure leads to a remarkable 20-fold reduction of capacity fading (% h−1). The protocol is a general approach for redox flow batteries, easily implementable and inexpensive. 0378-7753 http://hdl.handle.net/10259/6198 10.1016/j.jpowsour.2021.230516 Mitigating capacity fading in aqueous organic redox flow batteries through a simple electrochemical charge balancing protocol