General Electric Company

Gates Energy Products, Inc.

Eveready Battery Company, Inc.

Other

Saverio F Pensabene

Arthur J Catotti

Vincent J Puglisi

Jon Kenneth West

Douglas B Frye

Roy L Royalty

Leonard R Dinkler

Robert A Leclair

Carl F Van Conant

William L Fralick

George Phillip Cromer

Harry Harold Hazen

A positive electrode for use in a rechargeable nickel metal hydride cell and method of manufacture is disclosed. The electrode includes an electrically conductive substrate and an electrochemically active material. The active material includes nickel hydroxide carried by the substrate. A calcium-containing compound is deposited onto the active material to coat the active material with calcium.

Positive nickel electrode for nickel metal hydride cells

An electrode for a rechargeable electrochemical cell including an electrically conductive substrate, a layer of an electrochemically active material attached to the substrate, the active material comprising a reducible species of a metal, at least one conductive contact area formed of a metallic form of said metal attached to said substrate, said metallic contact area comprising said reducible species in a converted form. A positive electrode is further provided wherein said active material is nickel hydroxide and said metallic form of said metal is nickel metal. The invention further comprises the method for manufacturing electrodes as described above, featuring use of reducing gas to effect conversion.

Electrode having a conductive contact area and method of making the same

A sealed rechargeable nickel electrode containing electrochemical cell has a pasted negative electrode having paste layers adhered to a nonforaminous conductive substrate, which retards growth (swelling) of the nickel electrode on cycling.

Rechargeable nickel electrode containing electrochemical cell and method

Rechargeable nickel electrode containing electrochemical cell

A method and apparatus are provided for manufacturing an electrode for a rechargeable electrochemical cell by electrodepositing a metallic active material on a continuously moving metallic strip emmersed in an electrolytic bath containing an anode of the metal to be deposited. After depositing the metallic active material on the strip, the strip is passed through a second electrolytic bath wherein the metallic active material is at least partially oxidized.

Electrode for a rechargeable electrochemical cell and method and

A conductive substrate wherein the major surfaces thereof are embossed and wherein coated on at least one of the major surfaces is a sintered porous metal powder coating, and preparation of the substrate. The substrate is especially suitable as an electrode in an electrolytic cell when the substrate includes an electrochemically active material within the pores of the sintered porous metal powder coating.

Coated substrate, preparation thereof, and use thereof

A fluid handling system for circulating a selected fluid medium from a selected tank through one of a plurality of wash tanks for a predetermined period of time, draining the selected wash tank and thereby returning the fluid to the selected tank, and then filling the selected wash tank from a different tank and continuing the sequence for each of the different tanks. After a wash by medium from each tank, the object being washed is removed, and another is inserted. The sequential washes are repeated. This operation continues until the contents of a predetermined one of the tanks has degraded by a predetermined increase in impurity concentration, and for thereafter initiating a cascade whereby the tank having fluid of highest impurity concentration is drained, and the contents of each other tank is transferred to an adjacent tank, and completing the sequence by filling the predetermined tank with relatively pure fluid. The cascading sequence is effected with minimal impact on the washing sequences. Each of the fluid transfers from tank to wash tank and back is effected on a timed basis without significant mixing notwithstanding the fact that the particular medium employed prevents the use of a level sensor to identify when a wash tank has been pumped dry.

Fluid handling system

A process for manufacturing electrodes for nickel-cadmium alkaline storage cells consisting essentially of the steps of forming a porous nickel plaque, immersing the plaque in a slightly acidic-cadmium nitrate solution, removing the plaque from the solution and heating the plaque in air until dry, immersing the dried plaque in an alkali hydroxide solution, removing the plaque from the hydroxide solution and rinsing the plaque with water, reheating the plaque in air until substantially dry, repeating the foregoing treatments until the desired electrochemical loading in the plaque pores is attained, heating the plaque with the desired electrochemical pore loading to a temperature of between about 200.degree. C. and 300.degree. C. until substantially all of the Cd(OH).sub.2 in the plaque is converted to CdO and nitrate impurities in the plaque are converted to nitrogen oxide gases and volatized, immersing the plaque with the converted CdO in a second alkali hydroxide solution, cathodizing the plaque in the second solution until about 20-40% of the CdO therein is converted to Cd, removing the cathodized plaque from the second solution, rinsing the plaque with water and heating the rinsed plaque until the plaque is substantially dry.

Sintered negative plate

A process for manufacturing electrodes for nickel-cadmium alkaline storage cells consisting essentially of the steps of forming a porous nickel plaque, immersing the plaque in a slightly acidic-cadmium nitrate solution, removing the plaque from the solution and heating the plaque in air until dry, immersing the dried plaque in an alkali hydroxide solution, removing the plaque from the hydroxide solution and rinsing the plaque with water, reheating the plaque in air until substantially dry, repeating the foregoing treatments until the desired electrochemical loading in the plaque pores is attained, heating the plaque with the desired electrochemical pore loading to a temperature of between about 200.degree. C and 300.degree. C until substantially all of the Cd (OH).sub.2 in the plaque is converted to CdO and nitrate impurities in the plaque are converted to nitrogen oxide gases and volatilized, immersing the plaque with the converted CdO in a second alkali hydroxide solution, cathodizing and then anodizing the plaque in the second solution, removing the cathodized and anodized plaque from the second solution, rinsing the plaque with water and heating the rinsed plaque until the plaque is substantially dry.

A sintered porous plaque battery plate comprises an elongated substrate and a sintered porous plaque on both major surfaces thereof. One longitudinal edge of the substrate has a region substantially free of porous plaque for welding a current collector thereto and the other opposed longitudinal edge of the substrate has a transversely tapered porous plaque region on both major surfaces of the plate adjacent and extending longitudinally of the opposed edge for preventing the plaque from chipping along the opposed edge. The method for forming such plates includes the steps of (1) coating a substrate with double and single plate width strips of powdered metal slurry, (2) forming a V-shaped groove longitudinally of each of said double width strips to define a tapered porous plaque region along one edge of each plate, and (3) severing the substrate into strips of plate each with a tapered edge region after the slurry has been sintered into a porous plate.

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Gainesville, FL, United States of America

Saverio F Pensabene