Nonaqueous electrolyte secondary batteries
US11094924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2016 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jun 23, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is to provide a nonaqueous electrolyte secondary battery that can attain a smaller increase in direct current resistance after charge discharge cycles. An aspect of the invention resides in a nonaqueous electrolyte secondary battery wherein a positive electrode active material includes a secondary particle formed by aggregation of primary particles of a lithium transition metal oxide, and a secondary particle formed by aggregation of primary particles of a rare earth compound. On a surface of the secondary particle of the lithium transition metal oxide, the secondary particle of the rare earth compound is attached to a recess formed between adjacent primary particles of the lithium transition metal oxide in such a manner that the secondary particle of the rare earth compound is attached to each of the primary particles forming the recess. The lithium transition metal oxide includes magnesium dissolved therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.