Asymmetric organic alkyl ethyl carbonates for non-aqueous power sources
US5986879A · kind A · utility
1Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Acyclic, asymmetric ethyl alkyl carbonates, particularly for use with a carbonaceous, e.g., graphite, anode, in electrolytes suitable for portable power sources, are disclosed. Asymmetric alkyl carbonates having the general structural formula EtO--CO.sub.2 R, where R is larger than ethyl, and most preferably equal to butyl, iso-butyl or sec-butyl, are particularly useful in causing the freezing point of the electrolytes in which they are used to decrease dramatically, thus providing the key to low temperature, high cycle life and high capacity for portable power sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.