| 摘要 |
PROBLEM TO BE SOLVED: To suppress the rise of the battery internal pressure and the rise of the battery temperature when an incorporated battery is charged by covering the surface of a hydrogen storage alloy powder layer. with nickel powder having a specific Fischer size. SOLUTION: A hydrogen storage alloy powder layer is carried on a conductive substrate, and the surface of the hydrogen storage alloy powder layer is covered with the nickel powder with a three-dimensional chain-like structure having the Fischer size of 3.0μm or below. The nickel powder allows the oxygen gas generated on a positive electrode and reaching the surface of a hydrogen storage alloy electrode to quickly react to the hydrogen stored in the hydrogen storage alloy on the electrode surface to be reduced to water and suppresses the rise of the battery internal pressure. The nickel powder is manufactured when nickel carbonyl vapor is thermally decomposed, and it has a three- dimensional chain-like structure such as the carbon black structure. |
