Title:
LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/218218
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a means making it possible to suppress a decrease in battery capacity or the occurrence of short-circuiting in a lithium deposition-based lithium secondary battery. One embodiment of the present invention pertains to a lithium secondary battery provided with a power generation element comprising: a positive electrode formed by arranging, on the surface of a positive electrode current collector, a positive electrode active material layer containing a positive electrode active material allowing for intercalation/deintercalation of lithium ions; a negative electrode which has a negative electrode current collector and in which lithium metal is deposited onto the negative electrode current collector during charging; a solid electrolyte layer that is interposed between the positive electrode and the negative electrode and contains a solid electrolyte. This lithium secondary battery is characterized in that: an ion-conducting reaction-suppressing layer that has lithium ion conductivity and suppresses a reaction between the lithium metal and the solid electrolyte is provided to at least part of a region where the positive electrode active material layer faces opposite the negative electrode current collector, on a principal surface where the solid electrolyte layer faces opposite the negative electrode current collector; the solid electrolyte extends as far as a plane direction end on the positive electrode side of the solid electrolyte layer; an ion permeation-suppressing layer for suppressing permeation of lithium ions is provided to the negative electrode-side plane direction end of the solid electrolyte layer; and at least part of the ion permeation-suppressing layer overlaps with the ion-conducting reaction-suppressing layer in plan view.
Inventors:
OTANI KAZUFUMI (JP)
TAGUCHI KAISHI (JP)
TAGUCHI KAISHI (JP)
Application Number:
PCT/IB2022/000283
Publication Date:
November 16, 2023
Filing Date:
May 13, 2022
Export Citation:
Assignee:
NISSAN MOTOR (JP)
RENAULT SAS (FR)
RENAULT SAS (FR)
International Classes:
H01M10/0562; H01M4/134; H01M4/40; H01M10/052; H01M10/0585
Domestic Patent References:
| WO2021074741A1 | 2021-04-22 |
Foreign References:
| JP2021072262A | 2021-05-06 | |||
| JP2020135974A | 2020-08-31 | |||
| JP2015170595A | 2015-09-28 | |||
| JP2015125893A | 2015-07-06 |
Attorney, Agent or Firm:
IBC (JP)
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