Method for making oxygen electrode for alkaline galvanic cells
US4643235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Nov 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An oxygen electrode for alkaline galvanic cells. The electrode includes a talyst-containing carbon layer, a current collector, and a preferably foil-like separator for separating a liquid chamber from a gas chamber in such a way that the gas can pass to the carbon layer but the liquid cannot enter the gas chamber. The electrode has a structurally simple construction as a multi-layer, gas diffusion electrode, the current density of which, in the temperature range of between approximately 20.degree. and 80.degree. C., is approximately 350 mA/cm.sup.2 during operation with air, and greater than 1 A/cm.sup.2 during operation with oxygen. The current collector includes a metal grid which is at least partially embedded in a carbon layer. In the method of producing such an oxygen electrode, a catalyst salt solution is mixed with an aqueous activated carbon suspension and is deposited onto the activated carbon to form a catalyst dispersion. Subsequently, the liquid is separated off to form a catalyst composition, and the metal grid is embedded at least partially in this catalyst composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.