Borohydride-bromate fuel cell.

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/cm at 60°C) densities on discharge. A regenerative fuel cell cycle employing hydrogen as the reducer is also discussed. [ABSTRACT FROM AUTHOR]