Publication date: 7th February 2022
Soluble-Lead-Redox-Flow Battery (SLRFB) is an emerging electrochemical technology for large-scale energy-storage applications, for example, in the development of microgrids to effectively utilize intermittent renewable energy sources, namely solar and wind energy. SLRFB is attractive as it employs a common electrolyte and does not require an expensive ion-exchange membrane which reduces the cost and complexity of SLRFB system. The development in SLRFB technology has been hindered due to challenges associated with the system, such as Pb dendrite formation at the anode, O2 evolution and PbO2 sludge formation at the cathode, stack engineering and energy loss due to shunt current effect in the stack. The strategies adopted to overcome these issues to realize a fully functional SLRFB stack will be discussed.
Financial support from the DST-IISc Energy Storage Platform on Supercapacitors and Power Dense Devices through the MECSP2K17 program under grant no. DST/TMD/MECSP/2K17/20 and UKRI-GCRF project, SUNRISE (EP/P032591/1) are gratefully acknowledged. Rathod Suman acknowledges Indian Institute of Science, Bangalore and MHRD, India for providing GATE fellowship.