Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/028622
Kind Code:
A1
Abstract:
The present invention provides a means which is capable of improving the charge capacity during high-rate charge of a secondary battery that is provided with a solid electrolyte layer. The present invention provides a secondary battery which is provided with: a positive electrode that is obtained by arranging a positive electrode active material layer on the surface of a positive electrode collector; a negative electrode that is obtained by arranging a negative electrode active material layer on the surface of a negative electrode collector; and a first solid electrolyte layer and a second solid electrolyte layer, each of which contains a solid electrolyte and a binder. With respect to this secondary battery, the positive electrode and the negative electrode are arranged so as to face each other in such a manner that the first solid electrolyte layer and the second solid electrolyte layer are sandwiched between the positive electrode active material layer and the negative electrode active material layer; the first solid electrolyte layer is arranged on the positive electrode active material layer side, while the second solid electrolyte layer is arranged on the negative electrode active material layer side; the thickness of the first solid electrolyte layer is smaller than the thickness of the second solid electrolyte layer; and the ratio (A/B) of the binder concentration (A) (% by mass) relative to the total solid content in the first solid electrolyte layer to the binder concentration (B) (% by mass) relative to the total solid content in the second solid electrolyte layer satisfies 1 < A/B ≤ 4.5.
Inventors:
TAKADA HARUMI (JP)
SAKAMOTO KAZUYUKI (JP)
SAKAMOTO KAZUYUKI (JP)
Application Number:
PCT/IB2022/000434
Publication Date:
February 08, 2024
Filing Date:
August 01, 2022
Export Citation:
Assignee:
NISSAN MOTOR (JP)
RENAULT SAS (FR)
RENAULT SAS (FR)
International Classes:
H01M10/0585; H01M10/052; H01M10/0562
Domestic Patent References:
| WO2020166166A1 | 2020-08-20 | |||
| WO2014010043A1 | 2014-01-16 |
Foreign References:
| JP2022065651A | 2022-04-27 |
Attorney, Agent or Firm:
IBC (JP)
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