Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/149767
Kind Code:
A1
Abstract:
Provided are: a positive electrode active material for a lithium secondary battery, comprising a lithium transition metal oxide having a coating layer derived from crumpled graphene; and a method for preparing same. The crumpled graphene has a thickness of 0.1-10 nm. In the positive electrode active material, a thin and uniform crumpled graphene-derived coating layer effectively imparts electrical conductivity to the lithium transition metal oxide. When the positive electrode active material is applied to a lithium secondary battery, the lithium secondary battery has enhanced performance, particularly high discharge capacity at C-rate.
Inventors:
KIM TAEGON (KR)
KIM JEONGGIL (KR)
KIM MYEONGSOO (KR)
KWAK MIN (KR)
KIM JEONGGIL (KR)
KIM MYEONGSOO (KR)
KWAK MIN (KR)
Application Number:
PCT/KR2021/019664
Publication Date:
July 14, 2022
Filing Date:
December 22, 2021
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M4/36; H01M4/505; H01M4/525; H01M4/62; H01M10/052
Foreign References:
| JP2017103207A | 2017-06-08 | |||
| KR20200056308A | 2020-05-22 | |||
| KR20150060467A | 2015-06-03 | |||
| KR101977675B1 | 2019-05-13 | |||
| KR20210001809A | 2021-01-06 | |||
| KR20170119973A | 2017-10-30 |
Other References:
YI SHI, SHU-LEI CHOU, JIA-ZHAO WANG, DAVID WEXLER, HUI-JUN LI, HUA-KUN LIU, YUPING WU: "Graphene wrapped LiFePO4/C composites as cathode materials for Li-ion batteries with enhanced rate capability", JOURNAL OF MATERIALS CHEMISTRY, vol. 22, no. 32, 1 January 2012 (2012-01-01), pages 16465 - 16470, XP055127363, ISSN: 09599428, DOI: 10.1039/c2jm32649c
MA YANFENG, CHANG HUICONG, ZHANG MIAO, CHEN YONGSHENG: "Graphene-Based Materials for Lithium-Ion Hybrid Supercapacitors", ADVANCED MATERIALS, vol. 27, no. 36, 1 September 2015 (2015-09-01), pages 5296 - 5308, XP055949605, ISSN: 0935-9648, DOI: 10.1002/adma.201501622
MA YANFENG, CHANG HUICONG, ZHANG MIAO, CHEN YONGSHENG: "Graphene-Based Materials for Lithium-Ion Hybrid Supercapacitors", ADVANCED MATERIALS, vol. 27, no. 36, 1 September 2015 (2015-09-01), pages 5296 - 5308, XP055949605, ISSN: 0935-9648, DOI: 10.1002/adma.201501622
Attorney, Agent or Firm:
KIM, Sung Ho (KR)
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