Alkaline primary battery

Details Alkaline primary battery Alkaline primary battery

2008-03-18

2008-03-18

Crepeau, Jonathan (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S165000, C429S229000

Reexamination Certificate

active

07344803

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°.

REFERENCES:
patent: 6333126 (2001-12-01), Maruta
patent: 11-130441 (1999-05-01), None
patent: 2002-3223 (2002-01-01), None
patent: 2002-75354 (2002-03-01), None
patent: 2002-179427 (2002-06-01), None
patent: 2002-203546 (2002-07-01), None
Sasaki et al., “Modification of Nickel Oxyhydroxide Positive Active Materials for 3 Volt-Class Secondary Cells,” GS News Technical Report (2001), 60(1), 12-16.
International Search Report for International Applicaion No. PCT/JP02/01742 established and mailed on Jun. 4, 2002; ISA/JPO.

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