Non-aqueous electrolyte secondary cell containing negative active material including scaly graphite particles and graphite particles coated with amorphous carbon particles and amorphous carbon layer and method of manufacturing the same
US9577245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2012 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Dec 8, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a non-aqueous electrolyte secondary cell excellent in capacity retention rate and I-V characteristics after repeated cycles. The secondary cell contains a negative electrode active material containing scaly graphite particles and coated graphite particles. The coated graphite particles contain graphite particles and a coating layer coating the surfaces of the graphite particles. The coating layer contains amorphous carbon particles and an amorphous carbon layer. It is preferable that the negative electrode active material contain 1 to 6% by mass of the scaly graphite particles and that the graphite particles, the amorphous carbon particles, and the amorphous carbon layer be in a mass ratio of 100:α:β where 1≦α≦10, 1≦β≦10, and α≦1.34β.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.