Invention Application
- Patent Title: Hydrogen-absorbing alloy electrode, alkaline storage battery, and method of manufacturing the alkaline storage battery
- Patent Title (中): 吸氢合金电极,碱性蓄电池以及碱性蓄电池的制造方法
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Application No.: US11528312Application Date: 2006-09-28
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Publication No.: US20070072079A1Publication Date: 2007-03-29
- Inventor: Shigekazu Yasuoka , Yoshifumi Magari , Jun Ishida
- Applicant: Shigekazu Yasuoka , Yoshifumi Magari , Jun Ishida
- Priority: JP2005-281103 20050928; JP2006-051841 20060228
- Main IPC: H01M4/58
- IPC: H01M4/58

Abstract:
Conductivity of a negative electrode is improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing a hydrogen-absorbing alloy containing at least a rare-earth element, nickel, magnesium, and aluminum, to sufficiently enhance the cycle life of the alkaline storage battery. The negative electrode of the alkaline storage battery uses a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least a rare-earth element, nickel, magnesium, and aluminum. A surface layer is formed on the hydrogen-absorbing alloy particles, the surface layer having a weight ratio of aluminum to nickel less than that of the interior portion of the hydrogen-absorbing alloy. The weight ratio of aluminum to nickel in the surface layer is 0.015 or less.
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