US Patent Number
An electrolyte system for a flow battery has an anolyte including [Fe(CN)6]3− and [Fe(CN)6]4− and a catholyte including Fe2+ and Fe3+.
University of Kentucky Research Foundation, Lexington, KY (US)
Lipka, Stephen M. and Swartz, Christopher R., "Flow Battery" (2016). Center for Applied Energy Research Faculty Patents. Paper 36.