Title:
CATHODE COMPRISING SULFUR-CARBON COMPOSITE, AND LITHIUM ION SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/075528
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing a sulfur-carbon composite, comprising a carbon material pretreatment step. The method for preparing a sulfur-carbon composite, according to the present invention, effectively removes moisture and other impurities from a carbon material, and thus if a sulfur-carbon composite prepared by the method is applied as a cathode active material of a lithium-sulfur battery, the sulfur-loading capacity and overvoltage performance of the lithium-sulfur battery are improved. In addition, the initial irreversible capacity of the cathode active material decreases, and output characteristics and lifespan characteristics are improved.
Inventors:
PARK IN-TAE (KR)
SONG MYEONG-JUN (KR)
KIM YONG-HWI (KR)
PARK SEONG-HYO (KR)
LEE HYUN-SOO (KR)
CHOI RAN (KR)
SONG MYEONG-JUN (KR)
KIM YONG-HWI (KR)
PARK SEONG-HYO (KR)
LEE HYUN-SOO (KR)
CHOI RAN (KR)
Application Number:
PCT/KR2022/016764
Publication Date:
May 04, 2023
Filing Date:
October 28, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M4/36; C01B32/354; H01M4/02; H01M4/38; H01M4/62; H01M10/052
Foreign References:
| JP6623214B2 | 2019-12-18 | |||
| KR20180048309A | 2018-05-10 | |||
| KR20190056321A | 2019-05-24 | |||
| KR20200136656A | 2020-12-08 | |||
| KR20210147386A | 2021-12-07 |
Other References:
DU ZHENZHEN; XU JIN; JIN SONG; SHI YUCHEN; GUO CHENGKUN; KONG XIANGHUA; ZHU YANWU; JI HENGXING: "The correlation between carbon structures and electrochemical properties of sulfur/carbon composites for Li-S batteries", JOURNAL OF POWER SOURCES, vol. 341, 7 December 2016 (2016-12-07), AMSTERDAM, NL, pages 139 - 146, XP029863967, ISSN: 0378-7753, DOI: 10.1016/j.jpowsour.2016.11.102
ZHU, Y. ; MURALI, S. ; STOLLER, M.D. ; VELAMAKANNI, A. ; PINER, R.D. ; RUOFF, R.S.: "Microwave assisted exfoliation and reduction of graphite oxide for ultracapacitors", CARBON, vol. 48, no. 7, 1 June 2010 (2010-06-01), GB , pages 2118 - 2122, XP026969601, ISSN: 0008-6223
ZHU, Y. ; MURALI, S. ; STOLLER, M.D. ; VELAMAKANNI, A. ; PINER, R.D. ; RUOFF, R.S.: "Microwave assisted exfoliation and reduction of graphite oxide for ultracapacitors", CARBON, vol. 48, no. 7, 1 June 2010 (2010-06-01), GB , pages 2118 - 2122, XP026969601, ISSN: 0008-6223
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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