TECHNOLOGY FOCUS - METALLURGY - Preferred Component: The multihole metal material is foamed nickel or foamed copper multi-hole material, which is made of conduction fiber that is made from nickel fiber, nickel plating metal fiber, or carbon fiber. The hydrogen storage material used as negative electrode material is prepared by providing zirconium, titanium, nickel, M, and N' elements; melting using induction furnace or arc furnace under the protection of argon; separating the generated bulk Zr1-yTiyNi2-a-bMaN'b after cooling; crushing the obtained hydrogen storage metal into grains by mechanical method, where grain diameter is below 2 mm; putting in stainless steel reactor; vacuumizing the reactor at 10-3 torr at room temperature; hydrogenating up to 20 atm; and increasing and decreasing temperature for 1-10 times at room temperature to 100 degrees C to release and absorb hydrogen, obtaining hydrogen storage powder.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The multi-hole negative electrode of air cell is made by adding polypyrrole modified carbon black as negative electrode additive agent to prepare modified pulp comprising powder hydrogen storage metal, polypyrrole modified carbon black, and 5 wt.% sodium carboxymethyl cellulose solution or PTFE turbid solution at 1:0-0.5:1-3 mass ratio. The polypyrrole modified carbon black is made by dispersing carbon black into water, methanol, or chloroform at 1:15 mass ratio to prepare into turbid liquid; adding to glacial acetic acid or hydrochloric acid to adjust the pH at 2.5-3; stirring for 10-30 minutes at room temperature; adding to pyrrole according to the mass ratio of carbon material and pyrrole of 1:0.05-0.3; stirring for 5-10 minutes; adding to chloride of 1 g precious metal or its mixture; adding to H2O2 (0.05-0.1 g); stirring for 3-10 hours at room temperature; washing the product with warm deionized water; and drying in vacuum. The auxiliary electrode membrane is positive ion exchange membrane, negative ion exchange membrane, or polypropylene non-woven fabric.