Title:
POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, SECONDARY BATTERY, ELECTRONIC DEVICE AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/209475
Kind Code:
A1
Abstract:
The present invention provides: a positive electrode active material which is suppressed in a decrease of the discharge capacity during charge and discharge cycles; and a secondary battery which uses this positive electrode active material. The present invention provides a secondary battery that comprises a positive electrode active material which contains lithium cobaltate and wherein: the total mass of magnesium oxide and tricobalt tetraoxide as estimated by performing a Rietveld analysis on a pattern that is obtained by powder X-ray diffractometry of the positive electrode active material is 3% or less relative to the mass of the lithium cobaltate; and a powder of the positive electrode active material has a volume resistivity of 1.0E + 8 Ω∙cm to 1.0E + 10 Ω∙cm at a pressure of 64 MPa.
Inventors:
KAWATSUKI ATSUSHI (JP)
SAITO JO (JP)
TANEMURA KAZUKI (JP)
MOMMA YOHEI (JP)
MIKAMI MAYUMI (JP)
OGITA KAORI (JP)
SAITO JO (JP)
TANEMURA KAZUKI (JP)
MOMMA YOHEI (JP)
MIKAMI MAYUMI (JP)
OGITA KAORI (JP)
Application Number:
PCT/IB2023/053728
Publication Date:
November 02, 2023
Filing Date:
April 12, 2023
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M4/525; C01G51/00; C01G53/00
Domestic Patent References:
| WO2019244936A1 | 2019-12-26 |
Foreign References:
| JP2020140954A | 2020-09-03 | |||
| JP2018195581A | 2018-12-06 | |||
| JP2011129498A | 2011-06-30 |
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