Alizarin Based Metal Organic Redox Flow Battery as an Efficient Storage Device for Renewable Energy Sources

Redox Flow Battery (RFB) technology is the most attractive energy storage system for storing renewable energy sources in the form of electrical energy that can be fed into power networks. However, there are many challenges associated with RFB technology in terms of cost, low energy density, and scarcity of active materials. To address these issues, herein we report an innovative Metal-Organic Redox Flow Battery (MORFB) technology involving manganese ions as catholyte and alizarin red S (ARS), an anthraquinone derivatives as anolyte. The newly designed Mn/ARS redox flow cell exhibits the open circuit voltage of 1.432 V vs Ag/AgCl and possessing reasonably good cycling performance with 99.9% capacity retention even after 100 cycles.