Title:
POSITIVE ELECTRODE ACTIVE MATERIAL POWDER, POSITIVE ELECTRODE, LITHIUM ION BATTERY AND METHOD OF MANUFACTURING POSITIVE ELECTRODE
Document Type and Number:
Japanese Patent JP2022060686
Kind Code:
A
Abstract:
To provide positive electrode active material powder having improved filling properties.SOLUTION: Positive electrode active material powder includes a first particle group and a second particle group. The first particle group comprises a plurality of first particles. Each first particle includes 1-10 single particles. The second particle group comprises a plurality of second particles. Each second particle includes an aggregated particle. The aggregated particle is formed by the aggregation of 50 or more primary particles. The positive electrode active material powder has a flow function coefficient of 2.9 or more, the flow function coefficient being a ratio of a maximum principal stress with respect to unconfined yield stress. The unconfined yield stress and the maximum principal stress are measured by a direct shear test of powder.SELECTED DRAWING: None
Inventors:
TAKAHASHI KEIICHI
HANASAKI RYO
HANASAKI RYO
Application Number:
JP2020168291A
Publication Date:
April 15, 2022
Filing Date:
October 05, 2020
Export Citation:
Assignee:
PRIME PLANET ENERGY & SOLUTIONS INC
International Classes:
H01M4/525; C01G53/00; H01M4/131; H01M4/1391; H01M4/36; H01M4/505; H01M4/66
Domestic Patent References:
| JP2017191707A | 2017-10-19 | |||
| JP2017110244A | 2017-06-22 |
Foreign References:
| WO2020003642A1 | 2020-01-02 |
Attorney, Agent or Firm:
Fukami patent office