Electrolyte for a rechargeable cell
US6387571B1 · kind B1 · utility
39Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Feb 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrolyte for use in a rechargeable cell whose charging voltage exceeds 3.8 volts includes a redox chemical comprising a substituted aromatic molecule in which &agr; hydrogens are either absent, or are sterically against loss from the ionized form of the molecule. Such as chemical can act as a redox shuttle during overcharge, suppressing damage to the cell and preventing the deposition of metallic lithium during the overcharge of a lithium ion cell, but does not affect normal operation of the cell during either charge or discharge. One such molecule is hexaethyl benzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.