High temperature fuel cell electrolyte
US4009321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1972 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | Dec 20, 1992 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M8/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The specification discloses an improved paste electrolyte composition for use in a high-temperature molten carbonate fuel cell, using substantially pure alkali metal aluminate formed from reactive alumina as the only inert material in the electrolyte. Finely divided reactive alumina substantially completely free of silica is admixed with alkali metal carbonates and fired to remove carbon dioxide to form as final inert carrier material substantially pure inert alkali metal aluminate. The initial composition of the starting mixture is selected so that the final composition is between 40 and 70% by weight alkali metal carbonates. In contrast to magnesia supported fuel cells which show a 40% drop-off in power output, the aluminate paste electrolyte-utilizing fuel cells of the invention show essentially no deterioration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.