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Highly uniform Co9S8 nanoparticles grown on graphene nanosheets as advanced anode materials for improved Li-storage performance.
- Source :
-
Applied Surface Science . Dec2016, Vol. 390, p86-91. 6p. - Publication Year :
- 2016
-
Abstract
- A Co 9 S 8 /GNS (graphene nanosheets) nanocomposites has been synthesized via a facile solvothermal approach followed by thermal treatment in nitrogen at 500 °C using graphite oxide sheets, CoCl 2 ·6H 2 O and thiourea as the starting materials. Highly uniform Co 9 S 8 nanoparticles with a size of about 80–90 nm are evenly grafted on the surface of GNS, forming a unique Co 9 S 8 /GNS hybrid nanostructure. When evaluated as anode materials for lithium ion batteries, impressive electrochemical performances of the as-prepared nanocomposites are achieved compared to that of pure bulk Co 9 S 8 , with an high reversible capacity of 1480 mAh g −1 . Moreover, the as-synthesized nanocomposites present excellent cycling durability and high-rate capability. The improvement in the electrochemical properties could be attributed to the well-designed structure of the Co 9 S 8 /GNS nanocomposite which possesses large number of accessible active sites for lithium-ion insertion, fast ion diffusion rate and good electronic conductivity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 390
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 118568456
- Full Text :
- https://doi.org/10.1016/j.apsusc.2016.08.092