| abstract |
(57) [Problem] To provide a long-life and excellent nickel-hydrogen secondary battery which can be used for a backup use or the like. SOLUTION: A positive electrode composed mainly of nickel hydroxide and containing a cobalt compound, a zinc oxide and a composite silicate, and a negative electrode composed mainly of a hydrogen storage alloy and containing a yttrium oxide added with yttrium oxide And the structure of the separator, the composite silicate contains Mn or Al eluted from the negative electrode. , The electrochemical characteristics of the positive electrode are not degraded, and the life of the battery can be extended. |