Cylindrical nanostructured MoS₂ directly grown on CNT composites for lithium-ion batteries

Abstract

Direct attachment of MoS2 to materials with carbonaceous architecture remains a major challenge because of non-intimate contact between the carbonaceous materials and active MoS2 material. In this study, we report a new unique synthetic method to produce a new type of hybrid nanostructure of MoS2-CNTs composites. We developed a novel strategy for the synthesis of cylindrical MoS2 directly grown on CNT composites without the use of any other additives, exhibiting superior electrochemical performance as the anode material of lithium-ion batteries via a microwave irradiation technique. We adopted a simple step-by-step method: coating sulfur on CNTs and then reaction with a Mo source to synthesize hybrid cylindrical nanostructures of the MoS2-CNT composite. X-ray diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy analyses demonstrated that the as-synthesized MoS2-CNTs possessed a hybrid nanostructure, in which MoS2 sheets were well attached to the CNTs. The directly attached MoS2 sheets on the CNTs showed superior electrochemical performance as anode materials in a lithium-ion battery.

MoS2‐Based Nanocomposites for Electrochemical Energy Storage

“…The corresponding rate capability is shown in Figure 4c, where the capacity increases from 822 mAh g −1 to 984 mAh g −1 at 200 mA g −1 after 10 cycles and the capacity is maintained at 670 mAh g −1 at 1600 mA g −1 . The good electrochemical performances of MoS 2 ‐CNT composite are ascribed to the synergistic effects between the cylindrical nanostructured MoS 2 materials and CNT, and the prevention of aggregation by the unique structure and the high‐conductivity of CNT to improve the conductivity of insulating MoS 2 materials for LIBs 77. A similar strategy was applied by Srivastava and co‐workers and different weight ratios of MoS 2 and CNT (3:1 to 1:2) were discussed andenhanced electrochemical performances are demonstrated 78.…”

Mesoporous MoS2 as a Transition Metal Dichalcogenide Exhibiting Pseudocapacitive Li and Na‐Ion Charge Storage

“…MoS 2 has been well studied as a high capacity electrode material, achieving up to 1290 mAh g −1 when cycled with Li-ions to 0 V versus Li/Li + [ 29,30 ] and 854 mAh g −1 when cycled with Naions to 0 V versus Na/Na + . [ 31 ] In situ X-ray diffraction combined with Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy has revealed that when MoS 2 is cycled to these very low potentials to achieve these very high capacities, molybdenum metal nanoparticles are formed within a Li 2 S matrix, and subsequent electrochemical cycling operates as a lithium-sulfur redox couple.…”

Membrane destruction-mediated antibacterial activity of tungsten disulfide (WS2)

“…[8][9][10][11][12] Aer graphene, the rst family member of these 2D nanomaterials, a number of other such nanomaterials have been discovered including phosphorene, silicene and transition metal dichalcogenides (TMDCs). 13 Among them, the TMDCs, such as WS 2 , MoS 2 , WSe 2 , exhibit a considerably high structural stability, with a melting point reaching up to 1185 C. They have been explored for applications in eld-effect transistors, 14 lithium-ion batteries, 15,16 integrated circuits, 17 gas sensors, 18 hydrogen evolution 19 and phototransistors.…”