Lithium cell having a solid electrolyte constituted by a conductive vitreous compound
US4478920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1983 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Apr 13, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electrolyte is constituted by a conductive vitreous compound having the formula aP.sub.2 S.sub.5, bLi.sub.2 S, cLiX, where X represents chlorine, bromine, or iodine, and where a, b, and c are numbers chosen so that the ratio b/(a+b) lies between 0.61 and 0.70, and so that the ratio c/(a+b+c) is less than or equal to a limit corresponding to the solubility in vitreous phase of LiX in the compound aP.sub.2 S.sub.5, bLi.sub.2 S, with the positive active material comprising 20% to 80% by volume solid electrolyte together with an electron conductor, the improvement wherein a substance chosen from the halogens and the chalcogens is included in the electrolyte in order to produce an in situ chemical reaction at the lithium electrolyte interface thereby creating an ionically conductive bonding layer comprising a lithium halogenide or chalcogenide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.