Hetero-layered MoS2/C composites enabling ultrafast and durable Na storage

• Verfasst von: Li, Zhenyou [VerfasserIn]
• Verfasst von: Klingeler, Rüdiger [VerfasserIn]
• Titel: Hetero-layered MoS2/C composites enabling ultrafast and durable Na storage
• Verf.angabe: Zhenyou Li, Suya Liu, Bhaghavathi P. Vinayan, Zhirong Zhao-Karger, Thomas Diemant, Kai Wang, R. Jürgen Behm, Christian Kübel, Rüdiger Klingeler, Maximilian Fichtner
• E-Jahr: 2019
• Jahr: 1 June 2019
• Umfang: 9 S.
• Fussnoten: Gesehen am 10.10.2019 ; Im Titel ist "2" tiefgestellt
• Titel Quelle: Enthalten in: Energy storage materials
• Ort Quelle: Amsterdam : Elsevier, 2015
• Jahr Quelle: 2019
• Band/Heft Quelle: 21(2019), Seite 115-123
• ISSN Quelle: 2405-8297
• DOI: doi:10.1016/j.ensm.2019.05.042
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Hetero-layered structure
• Sach-SW: Heterointerfaces
• Sach-SW: Interfacial engineering
• Sach-SW: MoS/C composites
• Sach-SW: SIBs
• K10plus-PPN: 1678647675

Abstract

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-C@C) 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.