Nickel foam, generally used to make battery electrodes, has many other applications being explored. Compared with nickel plate and nickel mesh, the advantages of foamed nickel are obvious. The general manufacturing method of the foamed nickel material is as follows: first, the polyurethane sponge is electrified, then electrodeposited, and then sintered. This method adopts electroless plating, electroplating method and vacuum plating method; the electroplating method can use sulfate or sulfamate nickel plating; the sintering process is to burn the polyurethane sponge in the air, and carry out the sintering-reduction reaction in a hydrogen reducing atmosphere. A method, in which the polyurethane sponge is burned in the air by oxidation decarburization treatment; in a hydrogen reducing atmosphere, a 30-60 minute reducing atmosphere is used for sintering reduction, the reducing atmosphere is ammonia decomposition gas, and the gas to be consumed is 0.8-1.2 liters .
The method relates to a method for preparing foamed nickel by using polyurethane sponge to conduct electricity, electrodeposition, sintering, etc. The method is characterized in that sintering is the direct pyrolysis and electrodeposition of foamed polyurethane in a reducing atmosphere, wherein the reducing atmosphere is ammonia decomposition gas. The reaction mechanism is: in a hydrogen reducing atmosphere, the nickel foam on the electrodeposited polyurethane sponge is directly pyrolyzed and sintered, and the carbon and hydrogen react to generate gaseous hydrocarbons such as CH4 and C2H6. This gasification process can cleanly Graphite C is removed from the porous body.
