TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Materials: The zinc electrode is produced with active zinc materials, agglomerants, additives and current-collecting structures by several physical methods such as compacting, paste sintering, box (pipe), foaming and electrodeposition technology.The active zinc material is composed of zinc compounds as zinc alloy powder, zinc oxide, zinc hydroxide and zincate.The additive is composed of substance(s) such as zinc oxide, calcium, oxide, magnesium oxide, cadmium oxide, alumina, indium compounds, bismuth compound, lead compound, calcium hydroxide, graphite powder, acetylene black, carbon powder, conductive carbon black, active carbon powder, chopped fiber and carbon fiber.The current-collecting structure is produced with foamed metal, metal mesh and metallic tape (metal may either be elementary substance or alloy) by chemical methods of electroplating and composite plating on metal surfaces, preferably foamed brass and punched brass band or brass screen. Electrolyte is aqueous electrolyte, which is connected with battery diaphragm. The aqueous electrolyte is alkali metal aqueous solution and/or hydroxide aqueous of alkali metal, preferably potassium hydroxide and sodium hydroxide.The hydrogen-evaluation electrode is produced using pure metal e.g. cobalt, iron, molybdenum, tungsten, platinum, palladium, ruthenium, oxides such as ruthenium oxide, titanium oxide and zirconium oxide, alloy such as nickel-molybdenum, nickel-boron, nickel-phosphorus, nickel-sulfide, nickel-platinum, nickel-ruthenium, cobalt-molybdenum, nickel-tungsten, nickel-tin, molybdenum-tungsten, cobalt-tungsten, nickel-hydrogen storage alloy, nickel-phosphorus-cobalt-molybdenum-tungsten, nickel-boron-cobalt, nickel-boron-molybdenum, nickel-boron-cobalt-molybdenum, nickel-boron-cobalt-molybdenum-tungsten, nickel-boron-tungsten, nickel-cobalt-hydrogen storage alloy, metal or composite material of alloy and its oxide, preferably nickel-ruthenium oxide, nickel-molybdenum-ruthenium oxide and nickel-molybdenum-tungsten-ruthenium oxide.The oxygen-evaluation electrode is prepared with mesh, band, plate, sheet and formed metal structures of steel, iron and nickel materials through nickel plating or sulfur-containing nickel plating or with electrodes of titanium-base platinum group, iridium titanium-coated electrodes, manganese dioxide titanium-coated electrodes and perovskite type oxide electrode.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The agglomerant is composed of admixture(s) of carboxymethyl cellulose, polyltetrafluoroethylene emulsion, polyvinyl alcohol or polyvinylidene fluoride and hexafluoropropylene. The battery diaphragm is a complex film such as cellulose hydrate film, grafted polyethylene film, cellophane, nylon cloth, hydrated cellulose sheet, cotton paper, potassium titanate sheet, polyethylene felt, zirconia fiber sheet and non-woven vinylon fabrics.