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Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/028684
Kind Code:
A1
Abstract:
The present invention provides a secondary battery capable of operating below the freezing point. Provided is a secondary battery that comprises an electrolyte and a positive electrode active material, wherein the electrolyte includes a first ionic liquid, a second ionic liquid, and a lithium salt, the amount of the second ionic liquid added is 5-25 percent by weight and preferably 10-20 percent by weight relative to the total weight of the first ionic liquid, the second ionic liquid and the lithium salt, and the positive electrode active material has a layered rock salt-type crystalline structure. The second ionic liquid preferably has 1,3-diallyl imidazolium cations.

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Inventors:
SHIMADA KAZUYA (JP)
KURIKI KAZUTAKA (JP)
OGITA KAORI (JP)
TANAKA FUMIKO (JP)
MURATSUBAKI SHOTARO (JP)
Application Number:
PCT/IB2023/057384
Publication Date:
February 08, 2024
Filing Date:
July 20, 2023
Export Citation:
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Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M10/052; H01M4/505; H01M4/525; H01M10/0567; H01M10/0569
Domestic Patent References:
WO2011077939A12011-06-30
Foreign References:
CN111430793A2020-07-17
JP2009123382A2009-06-04
CN112216871A2021-01-12
JP2008156597A2008-07-10
CN112086683A2020-12-15
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