Abstract
New flake-like metal powder such as copper, nickel, nickel alloy and nickel-cobalt composite, which could provide good electrical conductivity and binding ability were developed as new electrode producing materials. A mixture of hydrogen storage alloy powder for metal hydride electrode or nickel hydroxide powder for nickel electrode with the flake-like metal powder was roll-pressed on a nickel-mesh substrate without polymeric binder and a formed nickel substrate. A laminated network structure of the flake-like metal powder was formed to connect tightly hydrogen storage alloy powder or nickel hydroxide powder in the electrode. The flake-like metal powder provided higher discharge capacity (utilization efficiency) and higher mechanical strength for the electrodes than a conventional powder.
