Hetero-layered MoS2/C composites enabling ultrafast and durable Na storage
Transition metal dichalcogenides have been considered as promising conversion-type electrode materials in sodium ion batteries, which allow multi-electron redox processes providing high capacities. However, the conversion reaction often leads to dramatic structural degradation of the electrodes duri...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
1 June 2019
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| In: |
Energy storage materials
Year: 2019, Volume: 21, Pages: 115-123 |
| ISSN: | 2405-8289 |
| DOI: | 10.1016/j.ensm.2019.05.042 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1016/j.ensm.2019.05.042 Verlag: http://www.sciencedirect.com/science/article/pii/S2405829719302387 
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| Author Notes: | Zhenyou Li, Suya Liu, Bhaghavathi P. Vinayan, Zhirong Zhao-Karger, Thomas Diemant, Kai Wang, R. Jürgen Behm, Christian Kübel, Rüdiger Klingeler, Maximilian Fichtner |
| Summary: | Transition metal dichalcogenides have been considered as promising conversion-type electrode materials in sodium ion batteries, which allow multi-electron redox processes providing high capacities. However, the conversion reaction often leads to dramatic structural degradation of the electrodes during de-/sodiation, which strongly limits their cycle lifetime, achievable capacities and rate performances. To circumvent these obstacles, in this study, we applied an interfacial engineering strategy by constructing a MoS2/C composite with an inter-overlapped hierarchical structure (MoS2-CC) through a bottom-up synthesis method. With the alternative stacking of MoS2 and carbon layers, MoS2-C@C provides an ideal environment to maintain the MoS2 structure through the van de Waals interaction within the multilayers. At the same time, the heterointerfaces in MoS2-C@C offer abundant electron transfer pathways. Consequently, the MoS2-C@C electrode exhibits prominently improved electrochemical performance including a high reversible capacity of 590mAhg−1, a superior cycling stability up to 1000 cycles and an excellent rate capability (164mAhg−1 at 20Ag−1 and 51mAhg−1 at 50Ag−1). The fast kinetics and high reversibility of the hetero-layered MoS2/C composite for Na storage demonstrate the feasibility of this synthetic strategy to prevent the structural degradation of the conversion-type battery materials. |
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| Item Description: | Gesehen am 10.10.2019 Im Titel ist "2" tiefgestellt |
| Physical Description: | Online Resource |
| ISSN: | 2405-8289 |
| DOI: | 10.1016/j.ensm.2019.05.042 |