Large hydrogen-oxygen fuel cell consisting of seven plates which have been 'exploded' to show the inner structure: 1) diaphragm of nickel-plated copper; 2) high-density polyethylene mesh; 3) electrode of microporous PVC silver plated and coated with supported platinum catalyst; 4) poly methyl meth acrylate alkaline electrolyte six normal potassium hydroxide; 5) electrode of microporous PVC silver plated and coated with supported platinum catalyst; 6) high-density polyethylene mesh; 7) outer current collector