Organic solvent electrolytes for high specific energy primary cells
US4129691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1978 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Jan 13, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/164
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electrolytes for use in lithium primary cells are made from a mixture of three organic solvents and an alkaline solute. The first solvent is chosen to have a dielectric constant greater than 35 (e.g. propylene carbonate), the second solvent is a linear polyether with its ether functional groups in the .gamma. position (e.g. 1-2 dimethoxyethane) and the third solvent has a high solvation power for dissolving large quantities of the alkaline salt (e.g. 1-3 dioxolane). The solvents are so chosen that the conductivity maxima of the electrolytes that would be obtained by mixing the solvents in pairs are higher than the conductivity maxima of the electrolytes that would be obtained by using each of the solvents on its own. The positive electrode cell using the electrolyte may be cupric oxide or ferrous disulphide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.