The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Dec. 21, 1999
Teruhiko Imoto, Tokushima, JP;
Yohei Hirota, Tokushima, JP;
Kikuko Kato, Katano, JP;
Nobuyuki Higashiyama, Ikeda, JP;
Mamoru Kimoto, Hirakata, JP;
Shin Fujitani, Hirakata, JP;
Koji Nishio, Hirakata, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A hydrogen absorbing alloy electrode is provided which is improved in hydrogen gas absorbing ability and in low-temperature discharge characteristics. The electrode contains a hydrogen absorbing alloy having a crystal structure of the CaCu5 type and represented by the stoichiometric ratio ABx, the hydrogen absorbing alloy being represented by MmNiaCobAlcMd wherein Mm is a misch metal, M is Mn and/or Cu, the atomic ratios a, b, c and d are in the respective ranges of 3.0≦a≦5.2, 0≦b≦1.2, 0.1≦c≦0.9, 0.1≦d≦0.8, wherein X is the sum of the atomic ratios a, b, c, and d, such that, X=a+b+c+d and, is in the range of 4.4≦X≦5.4. More specifically, the electrode contains a hydrogen absorbing alloy powder at least 5.0 in X, and a hydrogen absorbing alloy powder less than 5.0 in X.