Cobalt oxide passivation of nickel battery electrode substrates
US5248510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1992 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Feb 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nickel electrode (14) for use in a storage cell (10) includes a porous nickel substrate (50, 52) and a cobalt oxide passivation layer (56) on the nickel substrate (50, 52). A mass of nickel hydroxide/oxide (54) is impregnated within the pores of the substrate (50, 52). The cobalt oxide layer (56) is preferably deposited on the nickel substrate (50, 52) by contacting the substrate (50, 52) with an aqueous solution of cobalt nitrate, removing the excess solution, and heating the substrate in an oxygen-containing environment to form cobalt oxide. The cobalt oxide layer (56) at the surface of the substrate (50, 52) acts as a passivation layer to prevent corrosion of the nickel substrate (50, 52).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.