Positive active material for lithium secondary battery, and lithium secondary battery
US8663847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2009 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Jul 18, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an object of the present invention to provide a positive electrode material having a large ratio of the discharge capacity around 4 V to the total discharge capacity including the discharge capacity at 4V or lower while making the discharge capacity around 4 V sufficient, for the purpose of providing a lithium secondary battery using a lithium transition metal phosphate compound excellent in thermal stability, utilizing the discharge potential around 4V (vs. Li/Li+) that is higher than the discharge potential of LiFePO4, and being advantageous with respect to the detection of the end of discharge state, and a lithium secondary battery using the same. The present invention uses a positive active material for a lithium secondary battery containing a lithium transition metal phosphate compound represented by LiMn1-x-yFexCoyPO4(0.1≦x≦0.2, 0<y≦0.2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.