| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel-hydrogen secondary battery having a high discharge voltage, a large discharge capacity, and an excellent cycle life characteristic by setting the concentration of the electrolytic solution retained by a hydrogen storage alloy electrode higher than that of the electrolytic solution retained by a nickel electrode. SOLUTION: An electrode group constituted of nickel electrodes, separators, and hydrogen storage alloy electrodes is sealed in a can body together with an alkaline electrolytic solution to form a nickel-hydrogen secondary battery. The concentration of the electrolytic solution retained by the hydrogen storage alloy electrode is preferably set to 25-45wt.% as the alkaline electrolyte concentration, for example. The concentration of the electrolytic solution retained by the nickel electrode is preferably set to 15-35wt.% as the alkaline electrolyte concentration, for example. |
