PRODUCTION OF CADMIUM NEGATIVE ELECTRODE PLATE FOR ALKALINE STORAGE BATTERY

• Main Author: SHIMODA MASAKAZU
• Format: Patent
• Language: English
• Published: 25.07.1985
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PURPOSE:To eliminate the chemical conversion process and simplify the production process by coating a conductive, porous plate with a slurry-like active material kneaded with nickel powder, cadmium oxide, and metallic cadmium powder obtained by reducing cadmium oxide powder in the reducing atmosphere using an adhesive solution then drying it. CONSTITUTION:Cadmium oxide powder of 0.5-1mu is heated in a hydrogen stream to obtain metallic cadmium by reducing cadmium oxide. A mixture of metallic cadmium thus obtained, cadmium oxide, and nickel powder at a ratio of 2:7:1 is kneaded with an organic, adhesive solution, then a nickel-plated porous iron plate is coated with it and is dried to obtain an electrode plate. The electrode plate thus obtained does not contain impurities such as zinc sulfate as before, and metallic cadmium grains existing in an active material are fine, thereby the electrode plate has advantages that it is excellent in the charging/ discharging characteristics and also the capacity reduction while left as it is little.