Self-supporting porous CoS2/rGO sulfur host prepared by bottom-up assembly for lithium-sulfur batteries

doi:10.1016/j.jallcom.2018.03.331

CORC > 金属研究所 > 中国科学院金属研究所

	Self-supporting porous CoS2/rGO sulfur host prepared by bottom-up assembly for lithium-sulfur batteries
	Hong, XD ; Li, SL ; Tang, XN ; Sun, ZH ; Li, F
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2018-06-15
卷号	749 页码:586-593
关键词	Bottom-up assembly Lithium-sulfur batteries Cobalt disulfide Graphene
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2018.03.331
英文摘要	Cobalt disulfide (CoS2) has been revealed as strong adsorption and activation sites for polar polysulfides, which effectively accelerates the redox reactions of polysulfides in lithium-sulfur (Li-S) batteries. As an ideal sulfur host, a three-dimensional (3D) graphene framework is adopted for high-performance Li-S batteries. Considering the special function of the CoS2 nanoparticles and the advantages of a 3D porous graphene framework, a porous CoS2/reduced graphene oxide (CoS2/rGO) binder-free sulfur host is prepared by a bottom-up assembly and hydrothermal treatment. The porous rGO film is stacked by interconnected graphene sheets, and the CoS2 nanoparticles are dispersed on the graphene sheets uniformly, which effectively obstructs the stacking of graphene sheets. As a binder-free sulfur host, the porous CoS2/rGO sulfur host combines the sufficient electron conductivity of the porous rGO framework and the sulfur immobilization interaction of the CoS2 nanoparticles. This host material demonstrates an initial discharge capacity of 993.5 mAh g(-1) and a capacity of 806.7 mAh g(-1) after 110 cycles at 0.5 C. Both the capacity and cycling stability of the CoS2/rGO cathode were greatly improved over that of rGO. Furthermore, the bottom-up assembly approach provides a novel opportunity for preparing self-supporting graphene-based nanocomposite electrodes. (C) 2018 Elsevier B.V. All rights reserved.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000432666200068
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80154]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Liaoning Tech Univ, Coll Mat Sci & Engn, 47 Zhonghua Rd, Fuxing 123000, Peoples R China 3.Shandong Univ Technol, Sch Chem Engn, 266 Cunxi Rd, Zibo 255000, Peoples R China
推荐引用方式 GB/T 7714	Hong, XD,Li, SL,Tang, XN,et al. Self-supporting porous CoS2/rGO sulfur host prepared by bottom-up assembly for lithium-sulfur batteries[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,749:586-593.
APA	Hong, XD,Li, SL,Tang, XN,Sun, ZH,&Li, F.(2018).Self-supporting porous CoS2/rGO sulfur host prepared by bottom-up assembly for lithium-sulfur batteries.JOURNAL OF ALLOYS AND COMPOUNDS,749,586-593.
MLA	Hong, XD,et al."Self-supporting porous CoS2/rGO sulfur host prepared by bottom-up assembly for lithium-sulfur batteries".JOURNAL OF ALLOYS AND COMPOUNDS 749(2018):586-593.