Positive electrode active material powder, positive electrode, lithium ion battery, and method of producing positive electrode
US12148918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2021 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Mar 2, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode active material powder includes a first particle group and a second particle group. The first particle group consists of a plurality of first particles. Each of the first particles includes 1 to 10 single-particles. The second particle group consists of a plurality of second particles. Each of the second particles includes an aggregated particle. The aggregated particle is formed by aggregation of 50 or more primary particles. The positive electrode active material powder has a flow function coefficient of more than or equal to 2.9. The flow function coefficient is a ratio of a maximum principal stress to a uniaxial collapse stress. The uniaxial collapse stress and the maximum principal stress are measured by a direct shear test for powders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.