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:
Mar. 18, 2008
Filed:
Feb. 26, 2002
Shinichi Ueki, Shizuoka, JP;
Yoshiro Harada, Shizuoka, JP;
Mitsuhiro Nakamura, Shizuoka, JP;
Hiroto Sagisaka, Shizuoka, JP;
Takeshi Miyazaki, Shizuoka, JP;
Shinichi Ueki, Shizuoka, JP;
Yoshiro Harada, Shizuoka, JP;
Mitsuhiro Nakamura, Shizuoka, JP;
Hiroto Sagisaka, Shizuoka, JP;
Takeshi Miyazaki, Shizuoka, JP;
FDK Corporation, Tokyo, JP;
Tanaka Chemical Corporation, Fukui-Ken, JP;
Abstract
An alkaline primary cell which is improved in reduction of self-discharge and cell capacity under storage at a high temperature, has a prolonged life and makes use of nickel oxyhydroxide is provided inexpensively. β-Form nickel oxyhydroxide is contained in a positive electrode mixture as an active material, which contains cobalt and zinc as a substitutional element for solid solution, and has a total amount X+Y of molar ratios of cobalt atom X and zinc atom Y such that 2≦X+Y≦16, with a mixing ratio satisfying the relationship of Y≦3/2×X+1/2 and Y≧2/3×X −1/3, and where a diffraction peak obtained as a result of measurement of X-ray powder diffraction of nickel oxyhydroxide appears only in the vicinity of 18.5° within a range of 2θ=10°-30°.