Lithium secondary battery with a negative electrode of heat-treated natural graphite
US6447955B1 · kind B1 · utility
3Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary battery comprises a natural graphite as a negative electrode capable of occluding and discharging lithium ion, in which the natural graphite has been heat treated at a temperature of from 2,400-3,000° C. The heat treatment removes impurities from natural graphite. As a result, the electrolyte solution used for the battery hardly decomposes during charge and discharge and self discharge hardly occurs during storage of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.