High specific energy electrochemical cell with low initial impedance
US4581307A · kind A · utility
1Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high specific energy electrochemical cell comprises: a negative active material (4) based on an alkali metal or on an alkaline-earth metal; a separator (8); a non-aqueous liquid electrolyte; and a positive electrode comprising a solid active mass (5). The positive mass is provided, on its electrolyte side, with a porous and electron conductive metal covering (12) which does not participate in the electrochemical reaction, whose thickness is of the order of a few microns, and which is in contact with the metal portions serving as a positive current collector. The covering greatly reduces the initial impedance of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.