The iron-chromium redox flow battery (ICRFB) is considered the first true RFB and utilizes low-cost, abundant iron and chromium chlorides as redox-active materials, making it one of the most cost-effective energy storage systems. ICRFBs were pioneered and studied extensively by NASA and Mitsui in. . The answer: Because Fe-Cr RFBs have one of the safest chemistries, and offer massive scalability, with low-cost potential. New innovations also enable more low-cost potentials. Fe-Cr RFBs are the original flow battery. Developed by Larry Thaller et al at NASA in the 70's and 80's. Since then, 100's. . A flow battery, or redox flow battery (after reduction–oxidation), is a type of electrochemical cell where chemical energy is provided by two chemical components dissolved in liquids that are pumped through the system on separate sides of a membrane. [1][2] Ion transfer inside the cell (accompanied. . The aim of this collaborative project is to perform research and development on a FeCr-based redox flow battery (FeCrRFB) with rebalancing (RBC) system using a low-cost mining produced iron-chromium product stream as electrolyte. 2 V cell potential. We report the effects of chelation on the solubility and electrochemical properties of the Fe 3+/2+ redox couple. An Fe. .