Flower-Like MoS₂ for Next-Generation High-Performance Energy Storage Device Applications

Abstract

Here, a well crystalline 3D flower-like structured MoS2 (~420 nm) has been successfully synthesized on a large scale by a simple hydrothermal technique. The evolution of morphology in the formation process has also been investigated. The crystallinity, purity, and morphology of the sample are characterized by powder X-ray diffraction, Fourier-transform infrared spectroscopy, fieldemission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. The FESEM and TEM images reveal that the sample exhibits a uniform 3D flower-like microsphere shape with folded nanosheets, which are stretched out along the edge of the microsphere. The electrochemical performance of the sample has been investigated by cyclic voltammogram, galvanostatic charge–discharge, and electrochemical impedance spectroscopy studies. The results of the electrochemical analysis suggest that the material delivers a maximum specific capacitance (Csp) of 350 F/g at a discharge current density of 0.25 A/g with energy density 17.5 Wh/kg. It also exhibits good capability and excellent cyclic stability (94% capacity retention after 1,000 cycles in 1 A/g) owing to the coupling effect of electrical conductivity with the interesting morphology and larger active surface area. Hence, the sample may be used as a promising electrode material for high-performance energy storage devices.

Fabrication of Rhenium Disulfide/Mesoporous Silica Core–Shell Nanoparticles for a pH-Responsive Drug Release and Combined Chemo-Photothermal Therapy

“…In the SAED pattern of the ReS 2 @ mSiO 2 -RhB (Figure S3), the observed 'd' values are in agreement with those obtained from the ReS 2 XRD result. 29 The observed 'd' values of 0.74 nm also demonstrate the expanded layers of the ReS 2 (002) plane manifested in the shifted peaks in XRD.…”

Plant- and fungi-inspired hierarchical structures as electrode materials: a review

“…Another interesting flower-like formation is based on the assembly of petal-like flakes or sheets that has been reported in the structures of β-Ni(OH) 2 , 89 NiCo 2 O 4 , 83,90 MnO 2 @nitrogen-doped porous carbon, 84 NiO, 91 alkali doped-SnS 2 , 92 MoS 2 , 93 etc. These petals are interconnected with each other which is beneficial for a better electrochemical activity, such as lowering the charge transfer and ion diffusion resistance by shortening the charge transport distance.…”

A review on ultra‐small undoped MoS2 as advanced catalysts for renewable fuel production

“…The reaction process occurs in a sealed Teflon-lined autoclave, and the reaction temperature is usually more than 100°C. [69][70][71] The reaction could be controlled by changing the precursor concentration, pH, or organic additives. Using Na 2 MoO 4 •2H 2 O and L-cysteine as precursors to provide Mo and S sources, N,N-dimethylformamide was used as a surfactant to regulate the size of MoS 2 and maintain stability (Figure 7A).…”

“…Among all the chemical methods used to synthesize nano MoS 2 , hydrothermal and solvothermal methods have significant advantages, including the fact that samples with uniform particle sizes and high yields are obtained. The reaction process occurs in a sealed Teflon‐lined autoclave, and the reaction temperature is usually more than 100°C 69–71 …”