Hierarchical MoS2 Research Articles

Morphology-controlled synthesis of MoS2 nanostructures with different lithium storage properties

A one-step hydrothermal process was employed to prepare a series of MoS2 nanostructures via simply altering the surfactant as soft template and hydrothermal reaction temperature. Three kinds of MoS2 nanostructures (three-dimensional (3D) hierarchical nanospheres, one-dimensional (1D) nanoribbons, and large aggregated nanoparticles) were successfully achieved and investigated well by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), and Brunauer–Emmett–Teller analysis (BET). Electrochemical tests reveal that these MoS2 samples could deliver high initial discharge capacities (higher than 1050.0mAhg−1), but various cycling performances. The hierarchical MoS2 nanospheres assembled by sheet-like subunits show the highest specific capacity of 1355.1mAhg−1, and 66.8% of which can be retained after 50cycles. The good lithium storage property of hierarchical MoS2 nanospheres can be attributed to the higher electrolyte/MoS2 contact area and stable 3D layered structure.

Characterization and adsorption characteristics of mesoporous molybdenum sulfide microspheres

Bioinspired hierarchical mesoporous MoS2 microspheres are prepared by using pollen grains as biotemplate. Physicochemical properties of the as-prepared microspheres are characterized in detail by X-ray diffraction analysis, scanning electron microscopy and Fourier transform-infrared spectroscopy. Results indicate that the as-prepared products have a similar structure with the pollen grains, which maintain the ellipsoidal shape and the open pores networks on reticular shells. In addition, the products calcined at 800°C have an excellent adsorption activity of methyl orange (MO), which is probably related to a similar structure with the pollen grain.

Hierarchical MoS2 nanosheet/active carbon fiber cloth as a binder-free and free-standing anode for lithium-ion batteries

Owing to the layered structure and high theoretical capacity, MoS2 has attracted more and more interest as a potential anode material for lithium-ion batteries. However, it suffers from rapid capacity decay and low rate capability. In this work, we introduce a novel hierarchical material consisting of ultrathin MoS2 nanosheets grown on the surface of an active carbon fiber (ACF) cloth fabricated by a facile morphogenetic process. The ACF cloth acts as both a template and a stabilizer. The obtained MoS2/ACF cloth composite possesses hierarchical porosity and an interconnected framework. Serving as a free-standing and binder-free anode, it shows high specific capacity and excellent reversibility. A discharge capacity as high as 971 mA h g(-1) is attained at a current density of 0.1 A g(-1), and the capacity fade is only 0.15% per cycle within 90 cycles. Even after 200 cycles at a high current density of 0.5 A g(-1), the composite still shows a capacity of 418 mA h g(-1). The superior electrochemical performance of MoS2/ACF can be attributed to its robust structure and to the synergistic effects of ultrathin MoS2 nanosheets and ACF. This single-component anode that we propose benefits from a simplified electrode preparation process. The morphogenetic strategy used for the material production is facile but effective, and can be extended to prepare other metal sulfides with elaborate textural characteristics.

Facile synthesis of hierarchical hollow MoS2 nanotubes as anode materials for high-performance lithium-ion batteries

Novel hierarchical hollow MoS2 nanotubes have been fabricated, which exhibited excellent electrochemical performance as anode materials for lithium-ion batteries.

Synthesis of hierarchical MoS2 and its electrochemical performance as an anode material for lithium-ion batteries

Hydrothermally synthesized MoS2 products can be tuned from porous flowers to dense spheres by addition of NaOH.

Three-dimensional hierarchical MoS2nanoflake array/carbon cloth as high-performance flexible lithium-ion battery anodes

3D hierarchical MoS2nanoflake array/carbon cloth is synthesized with a thickness of MoS2nanoflakes <15 nm. A full Li battery based on the cloth exhibits good electrochemical performance and high flexibility.

Hierarchical Nanosheet‐Based MoS2 Nanotubes Fabricated by an Anion‐Exchange Reaction of MoO3–Amine Hybrid Nanowires

Moving onward and outward: MoO3–ethylenediamine (EDA) inorganic–organic hybrid nanowires were successfully transformed into hierarchical nanosheet-based MoS2 nanotubes (HNN-MoS2) by anion exchange with S2− anions at elevated temperature (see picture). The resulting nanotubes were highly active catalysts for photoelectrochemical hydrogen evolution by water splitting.

Facile synthesis of hierarchical MoS2microspheres composed of few-layered nanosheets and their lithium storage properties

In this work, we demonstrate an interesting polystyrene microsphere-assisted synthesis of hierarchical MoS(2) spheres composed of ultrathin nanosheets. The as-prepared sample exhibits promising lithium storage properties with improved cyclic capacity retention and rate capability.

Tungstenic acid induced assembly of hierarchical flower-like MoS2 spheres

Hierarchical flower-like MoS2 spheres with high purity were synthesized by hydrothermal method using WO3 nanorods or H2WO4 as an additive. The flower-like spheres were about 1μm in diameter and built up with MoS2 thin flakes with thickness of several nanometers. Energy disperse X-ray spectrum showed that the spheres were only composed of Mo and S with atomic ratio of 2:1. Powder X-ray diffraction result further indicated that the products were MoS2. The reaction mechanism is discussed and suggested that tungstenic acid played an important role on the formation of flower-like MoS2 spheres.