Mahmoud, Yousef Abdelaziz
Peterson, Amy M.
Vanadium redox flow batteries (VRFBs) are seen as promising candidates for grid energy storage. However, the high cost of the battery's ion-exchange membrane, DuPont's Nafion, restricts its economic viability. Nafion also exhibits high vanadium permeability, hindering battery lifespan. Studies show that Nafion conducts protons well because of the 4 nm sulfonate ion channels it forms, but these channels might be large enough for vanadium ions. Thus, it was hypothesized that simpler polyanions, when casted with inorganic nanowires, would order themselves around the nanowires, thereby orienting charged channels for proton mobility while simultaneously plugging channel volume from vanadium bulk transport. The goal was to fabricate a low cost membrane with high selectivity and conductivity.
Worcester Polytechnic Institute
Major Qualifying Project
Electrical and Computer Engineering