-lydrogen Treatment of the Porous LaNi₅ Electrode in an Alkaline Hydrogen-Oxygen Fuel C ell

Abstract

The influence of hydrogen treatment on the characteristics of the porous LaNi₅ electrode used for an alkaline hydrogen-oxygen fuel cell was investigated. The anode consisted of a double structure of porous films a thin film of LaNi5 alloy, which was coated with the alloy and Teflon dispersion solution (60% aqueous suspension of poly (tetrafluoroethylene)), at the liquid side was superimposed on the thin film, which was made of Teflon powder and active carbon produced by a hot press, at the gas side. The anode, which was characterized by the current density of 175 mA/cm2 at the overvoltage of 0.25 V and the limited current density of 280 mA/cm2, was obtained by the hydrogen treatment of the electrode made of mechanically grounded LaNi5 alloy for` 3 h at above 200°C under the hydrogen atmosphere.