Ni/metal hydride secondary element
US6881519B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2001 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Jul 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A Ni/metal hydride secondary element having a positive nickel hydroxide electrode, a negative electrode having a hydrogen storage alloy, and an alkaline electrolyte, the positive electrode, provided with a three-dimensional metallic conductive structure, also contains an aluminum compound which is soluble in the electrolyte, in addition to nickel hydroxide and cobalt oxide. The aluminum compound is aluminum hydroxide and/or aluminum oxide, and the mass of the aluminum compound which is present in the positive bulk material mixture is 0.1 to 2% by weight relative to the mass of the nickel hydroxide which is present. In combination with aluminum hydroxide or aluminum oxide, the positive electrode further contains lanthanoid oxidic compounds Y2O3, La2O3 and Ca(OH)2, as well as mixtures of these compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.