Process for producing lithium secondary battery
US8382860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2010 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Oct 12, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for producing a lithium secondary battery employs a charging method where a positive electrode upon charging has a maximum achieved potential of 4.3 V (vs. Li/Li+) or lower. The process includes charging the lithium secondary battery to reach at least a region with relatively flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3 V (vs. Li/Li+) and 4.8V (vs. Li/Li+) or lower. The lithium secondary battery includes an active material having a solid solution of a lithium transition metal composite oxide having an α-NaFeO2 type crystal structure. The composition ratio of Li, Co, Ni, and Mn contained in the solid solution satisfies Li1+1/3xCo1−x−yNiy/2Mn2x/3+y/2(x+y≦1, 0≦y and 1−x−y=z).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.