Phosphate additives for nonaqueous electrolyte rechargeable electrochemical cells
US6203942A · kind A · utility
71Cited by
14References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one phosphate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl phosphate compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.