| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen storage alloy electrode with high capacity and capable of performing quick charge by covering the surface of the hydrogen storage alloy electrode with a fluorine family water repellent represented by the specified formula. SOLUTION: The surface of a layer comprising hydrogen storage alloy powder is covered with a fluorine family water repellent represented by formula Y-[R<1> -(Rf-R<2> )a -Rf-R<1> ]-Y. (Rf is a perfluoroalkylene group, a divalent perfluoropolyether group, or a divalent group of combination of perfluoroalkylene group and divalent perfluoropolyehter group, R<1> , R<2> are the same or different substituted or non-substituted divalent hydrocarbon group, a is an integer of zero or more, and Y is hydrolyzable silyl group.) The storage ability of hydrogen gas is improved, and the charge/discharge cycle life is increased since the internal pressure of a battery does not increase even if quick charge is performed, and the deterioration of the battery capacity can be prevented. |
