Lithium oxyhalide cell with improved safety and voltage delay characteristics
US6780542B2 · kind B2 · utility
8Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2001 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49115
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to providing a lithium carbonate passivation layer on lithium through exposure of the active material to gaseous carbon dioxide prior to cell assembly. This results in an electrochemical cell which possesses improved safety and voltage delay characteristics in comparison to prior art cells comprising unexposed lithium. The preferred cell is of a lithium oxyhalide chemistry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.