Covalent Assembly of MoS₂ Nanosheets with SnS Nanodots as Linkages for Lithium/Sodium‐Ion Batteries

Abstract

Weak van der Waals interactions between interlayers of two‐dimensional layered materials result in disabled across‐interlayer electron transfer and poor layered structural stability, seriously deteriorating their performance in energy applications. Herein, we propose a novel covalent assembly strategy for MoS2 nanosheets to realize unique MoS2/SnS hollow superassemblies (HSs) by using SnS nanodots as covalent linkages. The covalent assembly based on all‐inorganic and carbon‐free concept enables effective across‐interlayer electron transfer, facilitated ion diffusion kinetics, and outstanding mechanical stability, which are evidenced by experimental characterization, DFT calculations, and mechanical simulations. Consequently, the MoS2/SnS HSs exhibit superb rate performance and long cycling stability in lithium‐ion batteries, representing the best comprehensive performance in carbon‐free MoS2‐based anodes to date. Moreover, the MoS2/SnS HSs also show excellent sodium storage performance in sodium‐ion batteries.

Single source precursor route to nanometric tin chalcogenides

“…XPS measurements of the microwave assisted decomposition of 3 (Fig.S2 †) showed the partial reduction of the Sn(IV) center, resulting in a mixed product formation of SnS 2 and Sn 2 S 3 . This was reinforced by measuring the interlayer distance calculated from FFT measurement of TEM analysis amounted to 2.7 Å for (302), 3.4 Å for (111) and 1.8 Å for (121)(b), which is in good agreement with the literature reported d-d spacing of Sn 2 S 3 [58][59][60]. In conclusion, the chosen decomposition parameters showed the partial reduction of the Sn(IV) center to Sn(II), resulting in mixed tin sulfide phases.…”

MoS2-Decorated/Integrated Carbon Fiber: Phase Engineering Well-Regulated Microwave Absorber

“…As one of the 2D material, MoS 2 has adjustable electrical property and can change between insulators and semiconductor metals. It has important applications in many fields such as optoelectronics [ 20 , 21 ], secondary batteries [ 22 , 23 ], and catalysis [ 24 , 25 ]. In addition, MoS 2 also has been proved to be an effective dielectric-type EMW absorbing material.…”

Doping and interface engineering in a sandwich Ti3C2Tx/MoS2−xPx heterostructure for efficient hydrogen evolution

“…37-1492). 25 Additionally, the characteristic peak of MXene at B231 shifts to a higher angle (B251). The growth of numerous ultrathin MoS 2 nanosheets on the surface and interlayer of MXene will generate a certain macroscopic stress, which affects the interlayer spacing of MXene, and thus shifts the XRD diffraction peaks of MXene.…”

“…24 Tabassum et al used B/N co-doped graphene nanotubes to confine MOF-derived CoP nanoparticles, which can activate the electron spin density between heteroatoms and adjacent carbon atoms, increasing the catalytic surface area toward the HER. 25 Therefore, it is expected that designing heterostructures with abundant interfaces and doping heteroatoms in MoS 2 -based catalysts are feasible to promote the HER process. Herein, considering the advantage of doping and heterostructures, we doped P element into ultrathin MoS 2 nanosheets, which are vertically grown on the 2D layered Ti 3 C 2 T x MXene by a hydrothermal method to form a Ti 3 C 2 T x MXene/MoS 2Àx P x heterostructure.…”