Title:
METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND POSITIVE ELECTRODE ACTIVE MATERIAL PRODUCED THEREBY FOR LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/075830
Kind Code:
A1
Abstract:
The present invention pertains to: a method for producing a positive electrode active material; positive electrode active material having a BET specific surface area of 10 m2/g or less produced by the method; a positive electrode containing the positive electrode active material; and a lithium secondary battery. The method comprises the steps of: preparing lithium transition metal oxide in the form of secondary particles of aggregated primary particles; forming a mixture by mixing the lithium transition metal oxide and carbon-based material having a hollow structure having a plurality of pores; and mechanically surface-treating the mixture to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material having a hollow structure having a plurality of pores has a specific surface area of at least 200 m2/g, and a degree of graphitization (ID/IG) of at least 0.5.
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Inventors:
KWAK MIN (KR)
KIM TAE GON (KR)
YOO TAE GU (KR)
PARK SIN YOUNG (KR)
LEE BO RAM (KR)
KIM TAE GON (KR)
YOO TAE GU (KR)
PARK SIN YOUNG (KR)
LEE BO RAM (KR)
Application Number:
PCT/KR2020/013953
Publication Date:
April 22, 2021
Filing Date:
October 13, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/36; C01G53/00; H01M4/505; H01M4/525; H01M4/62; H01M10/052
Foreign References:
| KR20130109785A | 2013-10-08 | |||
| JP2019149356A | 2019-09-05 | |||
| JP2013131325A | 2013-07-04 | |||
| JP2018056126A | 2018-04-05 | |||
| JPH0992265A | 1997-04-04 |
Other References:
See also references of EP 4016674A4
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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