Borohydride—bromate fuel cell

Abstract

A polymer electrolyte fuel cell with Pt grid electrodes employing acidic lithium bromate as the oxidant and alkaline sodium borohydride as the reducer is demonstrated. Such system provides simultaneously high energy (over 1000 A h/L and 660 A h/kg in the tanks) and high power (0.5 W/cm2 at 60°C) densities on discharge. A regenerative fuel cell cycle employing hydrogen as the reducer is also discussed.