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Improving the electrochemical property of Li-S batteries by using CoS2 as substrate materials.
- Source :
-
Ceramics International . Oct2018, Vol. 44 Issue 14, p17340-17344. 5p. - Publication Year :
- 2018
-
Abstract
- Metal sulfide CoS 2 is prepared and used as host materials for Li-S batteries. The CoS 2 particle could immobilize the polysulfide by catalyzing the redox reactions of soluble polysulfide to insoluble polysulfide. Besides, the employment of vapor growth carbon fiber (VGCF) interlayer between CoS 2 /S cathode and separator has a positive effect on physically adsorbing polysulfide. Consequently, the chemical and physical adsorption could exist in one Li-S battery system at the same time. As a result, the initial discharge capacity of CoS 2 /S composite cathode with VGCF interlayer is 1278 mAh g −1 at the rate of 0.1 C. After 200 cycles, the capacity still remains as high as 701 mAh g −1 , which is better than the battery without CoS 2 , showing excellent electrochemical performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LITHIUM sulfur batteries
*ELECTROCHEMISTRY
*COBALT sulfide
*CARBON fibers
*CATHODES
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 44
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 131091879
- Full Text :
- https://doi.org/10.1016/j.ceramint.2018.06.198