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:
Feb. 28, 2012
Filed:
Aug. 27, 2008
Shuhei Yoshida, Moriguchi, JP;
Kazuaki Tamura, Moriguchi, JP;
Yoshinobu Katayama, Moriguchi, JP;
Teruhito Nagae, Moriguchi, JP;
Masao Takee, Moriguchi, JP;
Shuhei Yoshida, Moriguchi, JP;
Kazuaki Tamura, Moriguchi, JP;
Yoshinobu Katayama, Moriguchi, JP;
Teruhito Nagae, Moriguchi, JP;
Masao Takee, Moriguchi, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, Osaka, JP;
Abstract
A hydrogen storage alloy used in a hydrogen storage alloy electrodehas a crystalline structure having a mixed phase made up of at least an ABtype structure and an ABtype structure, and a surface layer of hydrogen storage alloy particles is so formed as to have a nickel content ratio greater than that of a bulk. The ratio (X/Y) of the nickel content ratio X (% by mass) of the surface layer to the nickel content ratio Y (% by mass) of the bulk is greater than 1.0 but no more than 1.2 (1.0<X/Y≦1.2). The gradient between the content ratio of the nickel in the surface layer of the hydrogen storage alloy particles and the content ratio of the nickel in the bulk is alleviated and a hydrogen storage alloy electrode with high output characteristics is obtained.