Title:
SULFUR-CARBON COMPOSITE, PREPARATION METHOD THEREFOR, AND LITHIUM-SULFUR BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2018/030616
Kind Code:
A1
Abstract:
The present invention relates to a sulfur-carbon composite comprising a carbon-based material surface-modified by acid treatment, a preparation method therefor, and a lithium-sulfur battery comprising the same. According to the present invention, the sulfur-carbon composite comprises a carbon-based material surface-modified so as to have, on the surface thereof, a hydroxyl group and a carboxyl group capable of adsorbing polysulfide, and thus the elution of polysulfide is prevented when the sulfur-carbon composite is used as a cathode active material of a lithium-sulfur battery. Therefore, the capacity characteristics and the lifespan characteristics of a battery can be improved. In addition, according to the sulfur-carbon composite preparation method of the present invention, the surface of a carbon-based material can be modified by a simple process of treating with a mixed solution of nitric acid and sulfuric acid, and the amount of functional groups on the surface can be controlled according to the mixing ratio of nitric acid and sulfuric acid.
Inventors:
LEE DONGWOOK (KR)
SOHN KWONNAM (KR)
YANG DOO KYUNG (KR)
SOHN KWONNAM (KR)
YANG DOO KYUNG (KR)
Application Number:
PCT/KR2017/005526
Publication Date:
February 15, 2018
Filing Date:
May 26, 2017
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/36; H01M4/13; H01M4/38; H01M4/587; H01M10/052
Foreign References:
| KR20120051549A | 2012-05-22 | |||
| KR20140084840A | 2014-07-07 | |||
| KR20140090109A | 2014-07-16 | |||
| KR20120013364A | 2012-02-14 | |||
| KR20160102180A | 2016-08-11 | |||
| KR101379716B1 | 2014-03-31 |
Other References:
YAN, JIANHUA ET AL.: "Long-life, High-efficiency Lithium/sulfur Batteries from Sulfurized Carbon Nanotube Cathodes", JOURNAL OF MATERIALS CHEMISTRY A, vol. 3, no. 18, 2015, pages 10127 - 10133, XP055556610
Attorney, Agent or Firm:
KIM, Sung Ho et al. (KR)
Download PDF: