Non-aqueous electrolyte secondary battery
US9214669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Feb 15, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A non-aqueous electrolyte secondary battery includes a positive electrode containing active material particles composed of a core section formed of olivine type LiFePO4; an intermediate section that lies on the outer side of the core section and has LiFexPyOz; and a surface section that lies on the outer side of the intermediate section and has LiFeaPbOc; and a negative electrode containing lithium titanate, in which battery the molar concentration ratio of Fe relative to P at the core section is greater than the average of x/y of LiFexPyOz, the average value of a/b of LiFeaPbOc at the surface section of the positive electrode active material particles is smaller than the average of x/y of LiFexPyOz, and the positive electrode active material particles include a region in which x/y of LiFexPyOz at the intermediate section increases continuously or intermittently in the direction from the surface section toward the core section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.