Alkaline primary battery
US7344803B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 26, 2002 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Dec 25, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2004/028
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.