Redox Flow Batteries (RFB) are an energy storage technology developed by NASA in the 1970s for space applications. After several years of intensive research and development, several key patents for this technology expired in 2006, opening the arena to companies around the world.
Despite higher start-up costs and lower energy density, RFB technology has a shorter payback time than conventional batteries, writes IDTechEx analyst Lorenzo Grande. The researcher also attests to its good capacity conservation, even after many thousands of cycles. These are not all the advantages: RFBs retain most of their original value as it is possible to recycle their core components more easily than other battery chemicals. Some RFB chemicals, such as those based on vanadium, are already commercial.