| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel - hydrogen secondary battery which is superior in the self-discharge characteristic under a preservation at high temperatures. SOLUTION: After a charged or a discharged state of a battery obtained by sealing an electrode group 5 with interposed separator 3 formed of synthetic resin fibers between a positive electrode 2 and a negative electrode 4, together with alkaline electrolyte in a battery can 1, holes in the separator 3 have an average diameter not exceeding 50 μm, and the specific surface area of the separator 3 measured by the BET one point method using nitrogen is 0.5 to 5.0 meq/g. |
