Title:
POSITIVE ELECTRODE AND METHOD FOR PRODUCING POSITIVE ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2023/031729
Kind Code:
A1
Abstract:
The present invention provides a positive electrode that is stable in high-potential states and/or high-temperature states, and a secondary battery. Also provided are a positive electrode having excellent cycle characteristics, and a secondary battery. This positive electrode has a positive electrode active substance and an electrically conductive material. At least a portion of the surface of the positive electrode active substance is covered by the electrically conductive material. The positive electrode active substance has a lithium cobalt oxide containing magnesium, fluorine, aluminum, and nickel. The lithium cobalt oxide has, on the surface part, a region having the greatest concentration of one or a plurality of magnesium, fluorine, and aluminum. The electrically conductive material has carbon. The electrically conductive material is preferably one or more selected from carbon black, graphene, and a graphene compound.
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Inventors:
OCHIAI TERUAKI (JP)
KURIKI KAZUTAKA (JP)
KURIKI KAZUTAKA (JP)
Application Number:
PCT/IB2022/057858
Publication Date:
March 09, 2023
Filing Date:
August 23, 2022
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M4/131; H01G11/06; H01G11/24; H01G11/30; H01G11/86; H01M4/1391; H01M4/36; H01M4/525; H01M4/62
Domestic Patent References:
| WO2016052407A1 | 2016-04-07 |
Foreign References:
| JP2020140954A | 2020-09-03 | |||
| JP2020119761A | 2020-08-06 | |||
| JP2021099950A | 2021-07-01 | |||
| JP2012209077A | 2012-10-25 | |||
| JP2010232001A | 2010-10-14 |
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