MoS2 nanoplatelets scaffolded within CoS2 nanobundles as anode nanomaterials for sodium-ion batteries

• Published in: Journal of alloys and compounds Vol. 845; p. 156229
• Main Authors: Su, Yu, Wu, Chunxiao, Li, Hui, Chen, Feijiang, Guo, Ying, Yang, Lan, Xu, Sailong
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 10.12.2020; Elsevier BV
• Subjects: Anode nanomaterials; Anodes; Cobalt sulfide; Guest/host precursor; Interlayer nanoconfinement; Interlayers; Molybdenum disulfide; Nanomaterials; Precursors; Rechargeable batteries; Sodium-ion batteries; Sulfidation; Transition-metal sulfides; Transition-metal sulfides; Interlayer nanoconfinement; Anode nanomaterials; Sodium-ion batteries; Guest/host precursor
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.156229

The development of high-efficiency anode nanomaterials (such as MoS2) is critical to advancing sodium-ion batteries (SIBs) towards the practical application. Herein, MoS2 nanoplatelets well-confined within CoS2 nanobundles (MoS2/CoS2) are prepared as anode nanomaterials for SIBs. The MoS2/CoS2 composite is derived by the sulfidation of a guest/host precursor of PMo12O403− anion-intercalated Co(OH)2 via an interlayer nanoconfinement effect. Electrochemical testing demonstrates that the carbon-free MoS2/CoS2 composite exhibits a high capacity of 396.6 mA h g−1 after 80 cycles at 0.1 A g−1, and retains a decent reversible capacity of 203.8 mA h g−1 after 300 cycles at 0.5 A g−1. The result shows that our gest/host precursor-based synthesis strategy may open up an effective approach to prepare well-dispersed nanostructural composites for SIBs. [Display omitted] •MoS2 nanoplatelets well-confined within CoS2 bundles are prepared as SIB anodes.•The composite is derived by sulfurizing PMo12O403−/Co(OH)2 via a nanoconfinement.•A decent capacity of 396.6 mA h g−1 is delivered at 0.1 A g−1 after 80 cycles.