Lithium ion secondary battery
US8968923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2011 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Aug 24, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a lithium ion secondary battery having a positive electrode, a negative electrode and a non-aqueous electrolyte composition (electrolytic solution), characterized in that: the positive electrode includes a positive electrode active material represented by: aLi[Li1/3M12/3]O2.(1−a)LiM2O2 (where M1 represents at least one kind of metal element selected from the group consisting of Mn, Ti, Zr and V; M2 represents at least one kind of metal element selected from the group consisting of Ni, Co, Mn, Al, Cr, Fe, V, Mg and Zn; and a represents a composition ratio and satisfies a relationship of 0<a<1); the negative electrode includes a negative electrode active material containing silicon; and the non-aqueous electrolyte composition includes a lithium salt (CnF2n+1SO2)(CmF2m+1SO2)NLi (where m and n each independently represent an integer of 2 or more as a support electrolyte. This lithium ion secondary battery attains a high capacity and good cycle characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.