Instead of being an active participant in the redox reactions, electrodes in flow batteries mainly act as a catalyst, aiding in the reactions of the electrolyte species. This solid electrode, often made from a metal, stores energy through plating and de-plating processes, similar to how traditional batteries function. A popular example is the Zinc-Bromine flow battery. In this. First, in a conventional battery, the electro-active materials are stored internally, and the electrodes, at which the energy conversion reactions occur, are themselves serve as the electrochemical oxidizing agent and fuel, for example the lead-oxide and lead electrodes in a lead-acid battery. During discharge, chemical reactions release electrons on one side. These electrons move through an external circuit to power devices, making flow batteries. A flow battery, often called a Redox Flow Battery (RFB), represents a distinct approach to electrochemical energy storage compared to conventional batteries that rely on solid components.
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