Efficient sodium/sulfur battery
US4070527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Aug 13, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Improved sodium-sulfur batteries are provided by enhancing the utilization of active positive-electrode material. In sodium-sulfur batteries, employing a liquid sodium electrode separated from a liquid sulfur electrode by a solid .beta.-alumina electrolyte separator, where the sulfur is impregnated in an electronically conducting matrix such as porous carbon, enhanced utilization of active electrode material is achieved during the charging-discharging cycling by enhancing the electronic resistivity adjacent the .beta.-alumina in the sulfur electrode. This can be achieved in a variety of ways, particularly employing porous carbon of higher resistivity adjacent the .beta.-alumina as compared to the porous carbon distant from the .beta.-alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.