Accession Number : ADD012375

Title :   Ni-Co Alloy Plaque for Cathode of Ni-Cd Battery.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Lander,John J

Report Date : 27 Mar 1986

Pagination or Media Count : 14

Abstract : The present invention relates generally to Ni-Cd batteries, and, in particular, relates to the plaque material attached to the cathode. Because of the wide use of nickel-cadmium batteries, the corrosion rates of nickel and nickel-cobalt alloys are of interest to nickel-cadmium battery electrochemical theory and its technology. The plaque material of the cathode consists of a Ni-Co alloy in solid solution wherein the cobalt is by weight percent one to ten percent of the alloy. Conventional methods of applying the plaque material to the nickel core may be used. It is therefore an object of the present invention to provide an improved cathode for a nickel-cadmium battery wherein the nickel corrosion is substantially lessened in the plaque material. One process of making the plaque uses a nickel powder slurry that is applied to a nickel-plated steel core. This is then sintered at a high temperature which results in a very porous structure and an welding of the nickel grains to the core. This plaque is then soaked in appropriate salts to make either a positive or a negative plate; nickel salts make a positive plate and a cadmium salts a negative plate, for example. After impregnation, the plaque is placed in an electrolyte and an electric current is passed therethrough to convert the salts to their final form. In the nickel-cadmium cell, nickel hydroxide is the active material in the positive plate.

Descriptors :   *NICKEL CADMIUM BATTERIES, *COBALT ALLOYS, *NICKEL ALLOYS, *PATENT APPLICATIONS, *CATHODES, CADMIUM, CELLS, COBALT, CORES, CORROSION, ELECTRIC CURRENT, ELECTROCHEMISTRY, ELECTROLYTES, HIGH TEMPERATURE, HYDROXIDES, IMPREGNATION, MATERIALS, NICKEL, NICKEL COMPOUNDS, PLATING, POROSITY, POWDERS, RATES, SALTS, SLURRIES, SOLID SOLUTIONS, STEEL, STRUCTURES, THEORY, WELDING

Subject Categories : Electrochemical Energy Storage
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE