Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/189725
Kind Code:
A1
Abstract:
This secondary battery is provided with: a positive electrode; a negative electrode; a separator arranged between the positive electrode and the negative electrode; and an electrolyte. The positive electrode includes multiple primary particles, which are a positive electrode active material. The separator includes a porous layer and a coating layer arranged between the porous layer and the positive electrode and the coating layer includes multiple insulating particles with a major axis and a minor axis. The average particle size of the multiple primary particles is 100-2120 nm and the ratio of the average length of the minor axes of the multiple insulating particles with respect to the average particle size is 0.22-1.00.
Inventors:
ONUMA AMI (JP)
ASANUMA TAKEO (JP)
KONO YOSUKE (JP)
OUKI ATSUSHI (JP)
FUKUDA MASUMI (JP)
ASANUMA TAKEO (JP)
KONO YOSUKE (JP)
OUKI ATSUSHI (JP)
FUKUDA MASUMI (JP)
Application Number:
PCT/JP2023/010588
Publication Date:
October 05, 2023
Filing Date:
March 17, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/058; H01M4/131; H01M4/36; H01M4/505; H01M4/525; H01M4/58; H01M10/0525; H01M10/0566; H01M50/434; H01M50/443; H01M50/451; H01M50/457; H01M50/46; H01M50/489
Foreign References:
| JP2009199793A | 2009-09-03 | |||
| JP2009199798A | 2009-09-03 | |||
| JP2014011070A | 2014-01-20 | |||
| JP2018063816A | 2018-04-19 |
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
Download PDF: