Electrochemical cell
US4318969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Nov 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrochemical cell having an anode which is an alloy of an oxidizable metal, specifically lithium, and an element having a lower oxidation potential, for example calcium. The cell is partially discharged to deplete the amount of lithium at the surface of the anode. Then the cell is conditioned, preferably by annealing at a temperature of about 70.degree. C. for one to two weeks. This treatment produces an anode having a surface region which is either a layer consisting mostly of the element or a lithium compound of the element. This protective coating on the anode limits the short circuit current which can flow through the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.