| 摘要 |
PROBLEM TO BE SOLVED: To improve discharge characteristic in a battery, particularly the discharge characteristic at the high current density by using the flake-like copper powder with flat surface as a conductive agent to increase the close adhesion of a hydrogen storage alloy to the conductive agent. SOLUTION: When flake-like copper powder with flat surface is used for the conductive agent to be mixed in a hydrogen storage alloy, the part of the flat surface is brought into contact with the surface of alloy particles and is closely adhered to the surface of alloy particles through the ductility of the copper powder for to improving the electrode conductivity. The flake-like copper powder is preferably set to 2-20 μm in mean diameter, and 0.1-2.0 μm in thickens. At least a part of the surface of the flake-like copper powder is preferably covered with the copper oxide. When charging is achieved under this condition, the oxide is reduced into copper high in conductivity, and integrated with the alloy particles for enhancing close adhesion of copper powder to the alloy particles and the conductivity is further improved. |
