AQUEOUS ELECTROLYTE, REDOX FLOW BATTERY AND USE THEREOF

Disclosed is an aqueous electrolyte solution having a temperature of at least 30° C. comprising a compound with at least one redox-active residue of formula (I) (X—CH)Fe(Y—CH—Z) (I), The electrolyte may be used in redox flow batteries and is characterized by high stability of the redox active compounds at elevated temperatures.