Title:
METHOD FOR PRODUCING SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/242690
Kind Code:
A1
Abstract:
Provided are: a positive electrode active material by which a decrease in discharge capacity during charge and discharge cycles is suppressed; and a secondary battery using the same. Also provided is a secondary battery having high safety. The secondary battery includes: a positive electrode having a positive electrode active material; a negative electrode; and an electrolyte. The positive electrode active material is formed through a first step for mixing a composite oxide containing lithium, cobalt, and oxygen, a magnesium source and a nickel source to form a mixture, and a second step for heating the mixture, wherein the nickel source is a nickel fluoride, and in the second step, magnesium, nickel, and fluorine are segregated on a surface of the composite oxide.
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Inventors:
WADA RIHITO (JP)
KAWATSUKI ATSUSHI (JP)
SAITO JO (JP)
IKEDA TAKAYUKI (JP)
YAMAZAKI SHUNPEI (JP)
KAWATSUKI ATSUSHI (JP)
SAITO JO (JP)
IKEDA TAKAYUKI (JP)
YAMAZAKI SHUNPEI (JP)
Application Number:
PCT/IB2023/055954
Publication Date:
December 21, 2023
Filing Date:
June 09, 2023
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/36
Foreign References:
| JP2022070247A | 2022-05-12 | |||
| JP2008027731A | 2008-02-07 |
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