Armstrong, Westerman & Hattori, LLP
Hydrogen absorbing alloy electrode, method of fabricating hydrogen absorbing alloy electrode, and alkali secondary battery
In the present invention, a hydrogen absorbing alloy containing at least nickel, cobalt and aluminum, in which the sum a of the respective abundance ratios of cobalt atoms and aluminum atoms in a portion to a depth of 30 &aring; from its surface and the sum b of the respective abundance ratios of cobalt atoms and aluminum atoms in a bulk region inside thereof satisfy conditions of a/b&gE;1.30, or a hydrogen absorbing alloy containing at least nickel, cobalt, aluminum and manganese, in which the sum A of the respective abundance ratios of cobalt atoms, aluminum atoms and manganese atoms in a portion to a depth of 30 &aring; from its surface and the sum B of the respective abundance ratios of cobalt atoms, aluminum atoms and manganese atoms in a bulk region inside thereof satisfy conditions A/B&gE;1.20 is used for a hydrogen absorbing alloy electrode in an alkali secondary battery.
Sanyo Electric Co., Ltd.
Y H Y
Y10S H01M Y02E
additional inventional additional
Yasushi Teruhiko Nobuyuki Shin Koji Mamoru Kikuko
Kuroda Imoto Higashiyama Fujitani Nishio Kimoto Kato