Abstract:
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.