Highly Densed-MH Electrode Using Flaky Metal Powder and Gas-atomized Hydrogen Absorbing Alloy Powder

Abstract

Gas-atomizing method was used to fabricate sphere-shaped hydrogen storage alloy powder (AB₅ type alloy). The alloy powder was intermixed with flake-shapes Ni powder, followed by pressure-molding to make electrode. Charge/ discharge cycle test was conducted at current density of 100A/kg. The spherical alloy powder was packed densely into the electrode, achieving a maximum capacity per volume of electrode of 1800 Ah/L. The shape effect of the nickel powder and hydrogen storage alloy powder was discussed.