Title:
SECONDARY BATTERY AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/229776
Kind Code:
A1
Abstract:
Provides is a lithium ion secondary battery having a high capacity and excellent charging-discharging cycle properties. A secondary battery having a high capacity is provided. A secondary battery showing little change in shape under vacuum is provided. A secondary battery capable of being bent is provided. A secondary battery comprising a positive electrode active material and an electrolyte is provided, in which the positive electrode active material is lithium cobalt oxide to which magnesium is added, the magnesium has a concentration gradient that becomes higher in the direction from the inside of the positive electrode active material toward the surface of the positive electrode active material in the positive electrode active material, the electrolyte comprises an imidazolium salt, and the temperature range in which the secondary battery can be operated is -20°C to 100°C inclusive.
Inventors:
KURIKI KAZUTAKA (JP)
YONEDA YUMIKO (JP)
ASADA YOSHIHARU (JP)
KAKEHATA TETSUYA (JP)
YONEDA YUMIKO (JP)
ASADA YOSHIHARU (JP)
KAKEHATA TETSUYA (JP)
Application Number:
PCT/IB2022/053559
Publication Date:
November 03, 2022
Filing Date:
April 15, 2022
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M10/052; H01M4/36; H01M4/525; H01M10/0569; H01M50/105
Foreign References:
| JP2018088400A | 2018-06-07 | |||
| JP2016207641A | 2016-12-08 | |||
| JP2017022133A | 2017-01-26 |
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