Title:
POSITIVE ELECTRODE FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/112576
Kind Code:
A1
Abstract:
A secondary battery according to the present invention is provided with a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode comprises: a positive electrode collector; and a positive electrode active material layer which is arranged on the positive electrode collector and contains a positive electrode binder and lithium carbonate. The positive electrode active material layer comprises: a first layer which is positioned on a side close to the positive electrode collector so as to be adjacent to the positive electrode collector; and a second layer which is positioned on a side far from the positive electrode collector so as to be adjacent to the first layer. The positive electrode binder contains a fluorine-containing polymer compound. The ratio of the content of the positive electrode binder in the first layer to the content of the positive electrode binder in the second layer is more than 1; and the ratio of the content of the lithium carbonate in the first layer to the content of the lithium carbonate in the second layer is less than 1.
Inventors:
YOKOJI TAKATO (JP)
Application Number:
PCT/JP2022/042310
Publication Date:
June 22, 2023
Filing Date:
November 15, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M4/13; H01M4/62; H01M10/052; H01M10/0566
Foreign References:
| JP2008258055A | 2008-10-23 | |||
| KR20210040804A | 2021-04-14 | |||
| JP2010027530A | 2010-02-04 |
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
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