Nickel/metal hydride storage battery
US6074785A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1998 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Apr 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a nickel/metal hydride storage battery using improved nickel hydroxide with an increased energy density as the active material. This invention is characterized in that the nickel hydroxide as the active material of the positive electrode constituting the battery indispensably contains as a solid solution at least one transition metal selected from the group consisting of Mn, Cr and Co in a proportion of 2 to 20 atomic % based on the amount of the nickel hydroxide in terms of metallic nickel, and that the crystal structure of the nickel hydroxide at charged state is a hexagonal or tetragonal system which has a diffraction peak of 2.theta. on (00l) plane of .beta.-NiOOH at an angle of approximately 15.degree. to 19.degree. in X-ray diffraction using CuK.alpha. as a source and has a regular array with a NaCl type structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.