Highly Ambient-Stable 1T-MoS₂ and 1T-WS₂ by Hydrothermal Synthesis under High Magnetic Fields

Abstract

The phase-controlled synthesis of metallic and ambient-stable 2D MX 2 (M is Mo or W; X is S) with 1T octahedral coordination will endow these materials with superior performance compared with their semiconducting 2H coordination counterparts. We report a clean and facile route to prepare 1T-MoS 2 and 1T-WS 2 through hydrothermal processing under high magnetic fields. We reveal that the as-synthesized 1T-MoS 2 and 1T-WS 2 are ambient-stable for more than 1 year. Electrochemical measurements show that 1T-MoS 2 performs much better than 2H-MoS 2 as the anode for sodium ion batteries. These results can provide a clean and facile method to prepare ambientstable 1T-phase MX 2 .

Molybdenum Disulfide Based Nanomaterials for Rechargeable Batteries

“…The intrinsically high conductivity benefits the performance because the weight of conductive additives can be minimized or even eliminated. Ding and co‐workers reported a clean and facile route to prepare 1T‐MoS 2 by hydrothermal processing under high magnetic fields . Because of the higher volumetric magnetic susceptibility of the 1T‐MoS 2 phase, during magneto‐hydrothermal processing the energy of 1T‐MoS 2 can be lower than that of the 2H phase, leading to an increased concentration of 1T‐MoS 2 .…”

Tailoring the physicochemical properties of solution-processed transition metal dichalcogenides via molecular approaches

“…43,44,45 The main advantages of this strategy lie with the superior aptitude of materials in being induced to solubility via proper temperature and pressure conditions, along with the more accurate control of the operating parameters, which might influence the quality and crystal structure of the final systems. 46 Nevertheless, such an approach envisages some drawbacks related to the need of expensive autoclaves able to withstand the operating conditions (temperature, pressure, pH, solvent, etc.) and the lack of a realtime monitoring of the crystal growth ("black box").…”

Hydrothermal synthesis of two-dimensional MoS2 and its applications

“…It is believed that the magnetic field plays an important role in phase engineering of the products [98][99][100]. Most recently, Ding et al [101] reported the synthesis of metallic 1T-MoS 2 by a hydrothermal method under high magnetic fields. 2H-MoS 2 was found to generate without externally applied magnetic fields, while 1T-MoS 2 is formed with applied magnetic fields.…”