HYDROGEN STORAGE ELECTRODE AND MANUFACTURE THEREOF

摘要

PURPOSE:To absorb hydrogen in a gaseous state to retard increase in internal pressure and to obtain good performance by forming a mixed layer of water repellent resin powder and a melted thermoplastic resin which fixes the water repellent resin powder on the surface of a hydrogen storage electrode. CONSTITUTION:The surface of an electrode mainly comprising hydrogen storage alloy powder is covered with a mixed layer of water repellent resin powder and a melted thermoplastic resin whose melting point is lower than that of the water repellent resin. The surface of the hydrogen storage electrode shows water repellency and three-phase interface of gas, liquid, and solid is formed there with wetting prevented to easily absorb hydrogen gas. Since the melted thermoplastic resin fixes the water repellent resin with the electrode and water repellent resin particles themselves, detaching of the water repellent resin powder from the electrode is prevented. Increase in internal pressure is decreased even in quick discharge and steady gas absorption is kept for a long time. A battery having high capacity and capable of quick charging is obtained.