Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY POSITIVE ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/241217
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery positive electrode in which separation of a positive electrode mixture layer is lessened, and which has improved charge/discharge cycle characteristics. A nonaqueous electrolyte secondary battery positive electrode according to an aspect of the present disclosure is provided with a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector. The positive electrode mixture layer contains a positive electrode active material, fibrous carbon, and nonfibrous carbon. When the positive electrode mixture layer is divided into two equal regions in the thickness direction, and the half of the regions that is on the positive electrode collector side is defined as a first region and the half of the regions that is on the outer surface side is defined as a second region, the mass proportion of the fibrous carbon with respect to the total mass of the fibrous carbon and the nonfibrous carbon in the first region is set to be less than the mass proportion of the fibrous carbon with respect to the total mass of the fibrous carbon and the nonfibrous carbon in the second region.
Inventors:
SAKITANI NOBUHIRO
Application Number:
PCT/JP2021/017974
Publication Date:
December 02, 2021
Filing Date:
May 12, 2021
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H01M4/62; H01M4/13
Domestic Patent References:
| WO2019193882A1 | 2019-10-10 |
Foreign References:
| JP2016103479A | 2016-06-02 | |||
| JP2019071224A | 2019-05-09 | |||
| JP2016058309A | 2016-04-21 | |||
| JP2019061734A | 2019-04-18 |
Other References:
See also references of EP 4160717A4
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
Download PDF: