NOVELTY - A hydrogen-absorbing storage material comprises hydrogen-absorbing alloy particles; a group VIII transition metal that is mechanically alloyed with the alloy particles at a ratio of 0.25-10 wt.% transition metal to alloy particles to produce mechanically alloyed storage material particles; and a binding agent which at least partially covers the mechanically alloyed storage material particles to effect firm binding between the mechanically alloyed storage material particles while allowing free passage of hydrogen in and out of the mechanically alloyed storage material particles.    USE - The hydrogen-absorbing storage material is used for a microfabricated fuel cell for a microfabricated electronic device (both claimed), e.g. micro-machined sensors and small telemetry systems. The storage material can also be employed in nickel-metal hydride or nickel hydrogen batteries.    ADVANTAGE - The hydrogen-absorbing storage material can be readily produced and operated under ambient atmospheric conditions and high humidity. The storage material is active for hydrogen absorption and desorption immediately after deposition, and remains active after exposure to ambient air for more than 2 years and humidity (75% relative humidity) for extended periods of time. The storage material is found to retain its activity even after direct immersion in water for over 30 minutes and slow drying in air; and is cycled through approximately 4000 absorption/desorption cycles without noticeable degradation in hydrogen sorption/desorption speed or in the total hydrogen storage capacity.    DETAILED DESCRIPTION - A hydrogen-absorbing storage material comprises:    (1) hydrogen-absorbing alloy particles;    (2) a group VIII transition metal that is mechanically alloyed with the hydrogen-absorbing alloy particles at a ratio of 0.25-10 wt.% transition metal to alloy particles to produce mechanically alloyed storage material particles; and    (3) a binding agent which at least partially covers the mechanically alloyed storage material particles to effect firm binding between the mechanically alloyed storage material particles while allowing free passage of hydrogen in and out of the mechanically alloyed storage material particles.    The hydrogen-absorbing alloy particles have a diameter of approximately 1-10 mu m. The transition metal particles are disposed at least on a surface of the hydrogen-absorbing alloy particles, and have a diameter of approximately 0.1-1 mu m. The binding agent is present in an amount less than 1 wt.% of the mechanically alloyed storage material particles. INDEPENDENT CLAIMS are included for:    (1) a process of producing the hydrogen-absorbing storage material, comprising preparing the hydrogen-absorbing alloy particles with a diameter of approximately 1-10 mu m; adding the group VIII transition metal particles having a diameter of approximately 0.1-1 mu m; mechanically alloying the hydrogen-absorbing alloy particles and the group VIII transition metal particles to form the mechanically alloyed hydrogen-absorbing storage material particles; and adding to the mechanically alloyed hydrogen-absorbing storage material particles the binding agent which at least partially covers the mechanically alloyed hydrogen-absorbing storage material particles to effect firm binding between the mechanically alloyed hydrogen-absorbing storage material particles while allowing free passage of hydrogen in and out of the mechanically alloyed hydrogen-absorbing storage material particles;    (2) a microfabricated fuel cell, comprising a substrate; the hydrogen-absorbing storage material disposed in or on the substrate, and containing the hydrogen-absorbing alloy particles and the group VIII transition metal; an anode current collector disposed on the hydrogen-absorbing storage material; an anode catalyst disposed on the anode current collector; a polymer electrolyte disposed on the anode catalyst; a cathode catalyst disposed on the polymer electrolyte; and a cathode current collector disposed on the cathode catalyst; and    (3) a microfabricated electronic device, comprising an electric power source implemented as the fuel cell; and an electronic circuit powered by the fuel cell.