Cell provided with gaseous diffusion electrode, and method of charging and discharging the same

with a metal can, an anode, a separator and a cathode arranged concentrically in one another, an aqueous alkaline electrolyte solution, and a closure assembly. The closure assembly comprises a plastic top inserted in the open end ofthe can and has an outer cylindrical zone, a lower rim, a central portion defining a central bore, and an intermediate portion interconnecting the central portion with the lower rim. A current collector nail is inserted through the central bore and penetrates into the anode. A negative cap of a metal sheet material forms the negative terminal of the celi. The negative cap has a flange portion ending in an inwardly bent rim, the can has a bead at a specific distance from its open end, and the bead serves as an abutment member for &he closure assembly when inserted in the can. The plastic top defines a conforming support surface for the inwardly bent rim substantialiy at the connection zone ofthe outer cylindrical zone and the lower rim. The can has a gasket zone above the bead, and a sealant is provided to cover the inside surface of the can at the gasket zone. The end portion of the gasket zone is crimped over the inwardly bent rim so that the outer cylindrical zone of the plastic top is pressed and crimped therebetween, whereby the inwardly bent rim provides a spring action pressing the outer cylindrical zone in radial direction towards the gasket zone and in axial direction towards the bead.

5479700 DESIGN AND MANUFACTURING METHOD FOR A SOLID ELECTROLYTE ION CONDUCTING DEVICE Nachlas Jesse A; Powers Kelly B; McJunkin James R Eden, UT, UNITED STATES dssig.;ed to Ceramatec lnc An ion conducting device having a plurality of solid electrolyte plates arranged into a stack, each electrolyte plate having electrode material adherent to a significant portion thereof. A plurality of individual spacers are disposed between adjacent electrolyte plates in the stack, each spacer spacing successive electrolyte plates apart, and defining a plurality of chambers in the spaces between adjacent electrolyte plates. The electrode material on the electrolyte plates is electrically connected whereby electrode material on every other successive plate is connected in series, from one end of

the stack to the other, whereupon the electrical path wraps around the stack and extends back along the stack and connects in series the electrodes not previously connected.

5480741 CELL PROVIDED WITH GASEOUS DIFFUSION ELECTRODE, AND METHOD OF CHARGING AND DISCHARGING THE SAME Sakai Tetsuo; lwaki Tsutomu Ikeda, JAPAN assigned to Agency of Industrial Science & Technology A cell provided with a gaseous diffusion electrode is constituted of the gaseous diffusion electrode, a hydrogen-absorbing alloy electrode, and a chargeable auxiliary electrode wherein nickel hydroxide is used as the active material thereof. The chargeable auxiliary electrode may be disposed either between the gaseous diffusion electrode and the hydrogen-absorbing alloy electrode, or on the opposite side of the gaseous diffusion electrode to the hydrogen-absorbinn alloy electrode. The chargeable auxiliary electrod< .,: L .an be used may be either a sintered-type nickei :I..IIre ‘e for securing a long life span, or a foamed-tyoc .rick A electrode or a fiber-type nickel electrode for sec. da high capacity. The hydrogen-absorbing alloy electrode has a layer of at least one of metallic nickel, cobalt and copper on the surface of the alloy in order to suppress oxidation thereof at the time of over discharge.

5480742 ELECTROCHEMICAL CELL INCLUDING COMPRESSED, UNBONDED, ELECTRODE GRANULES AND LIQUID ELECTROLYTE Crez Mordechai; Reshef Israel ISRAEL

69691 Tel Aviv,

An electrochemical cell including a housing containing a cathode electrode, an anode electrode, electrode terminals, and a liquid electrolyte; characterized in that the electrodes are in the form of unbonded granules located in separate compartments within the housing