Positive electrode material for alkaline storage battery, method of producing the same, and alkaline storage battery using the same
US6083642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a positive electrode material which provides an alkaline storage battery having high active material utilization, wherein good capacity recovery can be obtained by charging even after standing in the state of overdischarge or short circuit, and reduction in capacity scarcely arises. This active material comprises nickel hydroxide particles and a cobalt oxide. The cobalt oxide is a higher cobalt oxide containing as a main component .gamma.-cobalt oxyhydroxide, which belongs to any one crystal system of hexagonal, orthorhombic and monoclinic systems and has a layered structure, wherein a lattice spacing of the (003) plane is from 5.5 to 7.0 angstroms and an average valence of cobalt is higher than 3.0. Those which are prepared by coating the surface of nickel hydroxide particles with the higher cobalt oxide are preferable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.