Design and facile synthesis of defect-rich C-MoS2/rGO nanosheets for enhanced lithium–sulfur battery performance
| Autor: | Xiaotao Zu, Pengcheng Li, Juwei Wu, Bo Li, Chengxiang Tian, Xia Xiang, Zheng Ma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Annealing (metallurgy) Composite number Oxide General Physics and Astronomy Lithium–sulfur battery 02 engineering and technology lcsh:Chemical technology 010402 general chemistry lcsh:Technology 01 natural sciences Full Research Paper law.invention chemistry.chemical_compound law Nanotechnology lcsh:TP1-1185 General Materials Science Electrical and Electronic Engineering lcsh:Science Dissolution reduced graphene oxide (rGO) high-performance electrodes lcsh:T Graphene lithium–sulfur battery 021001 nanoscience & nanotechnology lcsh:QC1-999 double modification 0104 chemical sciences Nanoscience chemistry Chemical engineering Amorphous carbon Electrode molybdenum disulfide (MoS2) lcsh:Q annealing 0210 nano-technology lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology Beilstein Journal of Nanotechnology, Vol 10, Iss 1, Pp 2251-2260 (2019) |
| ISSN: | 2190-4286 |
| Popis: | We report a simple one-step hydrothermal strategy for the fabrication of a C-MoS2/rGO composite with both large surface area and high porosity for the use as advanced electrode material in lithium–sulfur batteries. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing reduced graphene oxide (rGO) and amorphous carbon. The conductibility of the cathodes can be improved through the combination of amorphous carbon and rGO, which could also limit the dissolution of polysulfides. After annealing at different temperatures, it is found that the C-MoS2/rGO-6-S composite annealed at 600 °C yields a noticeably enhanced performance of lithium–sulfur batteries, with a high specific capacity of 572 mAh·g−1 at 0.2C after 550 cycles, and 551 mAh·g−1 even at 2C, much better than that of MoS2-S nanosheets (249 mAh·g−1 and 149 mAh·g−1) and C-MoS2/rGO-S composites (334 mAh·g−1 and 382 mAh·g−1). Our intended electrode design protocol and annealing process may pave the way for the construction of other high-performance metal disulfide electrodes for electrochemical energy storage. |
| Databáze: | OpenAIRE |
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