Abstract: An improved zinc electrode for use in rechargeable nickel-zinc electrochemical cells having greatly enhanced cycle life is disclosed, which comprises in admixture Zn, ZnO, HgO and an organic liquid binder produced via the reaction of diacetone acrylamide (DAA) and acrylic acid, which mixture has been formed into a paste and uniformly applied to a suitable current collector, wherein the ZnO component has an average surface area of about 9-10 m.sup.2 /gr and contains about 0.001 to 0.002 percent by weight Cd and about 0.001 to 0.002 percent by weight Pb.

Abstract: An improved zinc electrode for use in rechargeable nickel-zinc electrochemical cells having greatly enhanced cycle life is disclosed, which comprises in admixture Zn, ZnO, HgO and an organic liquid binder produced via the reaction of diacetone acrylamide (DAA) and acrylic acid, which mixture has beem formed into a paste and uniformly applied to a suitable current collector, wherein the ZnO component has an average surface area of about 3.5-4.0 m.sup.2 /gr and contains about 0.08 to 0.11 percent by weight Cd and about 0.05 to 0.08 percent by weight Pb, and has a generally rod-like particle structure.

Abstract: A gas generation apparatus which is useful for the concentration of oxygen or for the generation of oxygen and hydrogen by electrolysis has a catalytic cathode, an improved catalytic anode with a catalyst selected from platinum-iridium alloys containing 5 to 50 per cent iridium, a cation-exchange membrane positioned between and in electrical contact with the cathode and anode, means for providing a direct current potential between the cathode and the anode, and outlet means for removing gas from at least one of the electrodes. Methods are described for the concentration of oxygen and for generation of oxygen and hydrogen by electrolysis.