Metallic 1T molybdenum disulfide nano-sheet array as well as preparation method and application thereof

A technology of nanosheet array and molybdenum disulfide, applied in the direction of molybdenum sulfide, nanotechnology, nanotechnology, etc., can solve the problems of unfavorable large-scale preparation and commercial application, high cost, and high equipment requirements, and achieve low cost and simple steps , Improve the effect of wetting performance

Inactive Publication Date: 2017-10-24
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many methods for preparing metal phase 1T molybdenum disulfide, mainly including alkali metal intercalation stripping method, electron beam bombardment method, high pressure method, noble metal electron transfer method, etc., but these methods generally have relatively high equipment requirements and high cost. Not conducive to large-scale preparation and commercial application

Method used

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  • Metallic 1T molybdenum disulfide nano-sheet array as well as preparation method and application thereof
  • Metallic 1T molybdenum disulfide nano-sheet array as well as preparation method and application thereof
  • Metallic 1T molybdenum disulfide nano-sheet array as well as preparation method and application thereof

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preparation example Construction

[0026] The invention provides a method for preparing a metallic 1T molybdenum disulfide nanosheet array, comprising the following steps:

[0027] heat-treating the substrate to obtain a functionalized substrate;

[0028] The functionalized substrate, molybdate, and sulfur-containing compound were solvothermally reacted in a solvent to obtain metallic 1T molybdenum disulfide nanosheet arrays.

[0029] The substrate is heat-treated to obtain a functionalized substrate. In the present invention, the base is preferably carbon cloth, carbon paper and nickel foam; the present invention has no special requirements on the shape and area of ​​the base, and the shape and area of ​​the base can be set according to actual needs; the present invention has no special requirements on the shape and area of ​​the base; There is no special requirement for the source of the material, and a substrate well known to those skilled in the art can be used, such as commercially available carbon cloth,...

Embodiment 1

[0044] Cut the carbon cloth (CFC) into an area of ​​1.13cm 2 The discs were ultrasonically washed with acetone, ethanol, and water for 15 min, and then dried;

[0045] Calcining the dried carbon cloth at 450°C in air for 1 hour to obtain functionalized carbon cloth;

[0046] Dissolve 0.5 mol of sodium molybdate dihydrate and 1.25 mol of L-cysteine ​​in a mixed solvent of 50 mL of water and DMF (the volume ratio of water and DMF is 1:1.5), and stir for 30 min to dissolve;

[0047] Add the obtained reaction solution into a polytetrafluoroethylene liner with a volume of 80mL, put a piece of functionalized carbon cloth disc in the liner, transfer it to a hydrothermal reaction kettle and keep it warm at 200°C for 12h, then cool naturally, separate , washing, and drying to obtain a carbon cloth covered with metallic 1T phase molybdenum disulfide nanosheet arrays.

[0048] Carbon cloth (CFC), metallic 1T phase molybdenum disulfide nanosheet arrays (1T-MoS) grown on the surface of c...

Embodiment 2

[0052] Cut the nickel foam into an area of ​​1.13cm 2 The discs were ultrasonically washed with acetone, ethanol, and water for 15 min, and then dried;

[0053] The dried carbon cloth was calcined in air at 400°C for 1.5 hours to obtain functionalized nickel foam;

[0054] Dissolve 0.5mol of sodium molybdate dihydrate and 1.0mol of L-cysteine ​​in 30mL of water, stir for 30min to dissolve;

[0055] The resulting reaction solution was added to a polytetrafluoroethylene liner with a volume of 80 mL, and a piece of functionalized nickel foam disc was placed in the liner, transferred to a hydrothermal reaction kettle and kept at 180°C for 24 hours, then cooled naturally, and separated , washing, and drying to obtain foamed nickel covered with metallic 1T phase molybdenum disulfide nanosheet arrays.

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Abstract

The invention provides a metallic 1T molybdenum disulfide nano-sheet array as well as a preparation method and application thereof. The method comprises the following steps: carrying out thermal treatment on a substrate to obtain a functionalized substrate; carrying out solvothermal reaction on the functionalized substrate, molybdate and a sulfur compound in a solvent to obtain the metallic 1T molybdenum disulfide nano-sheet array. According to the method disclosed by the invnetion, the thermal treatment on the substrate is carried out firstly, so that the wettability of the surface of the substrate is improved; then through the one-step solvothermal reaction, the metallic 1T molybdenum disulfide nano-sheet array can be obtained on the surface of the substrate. The preparation method disclosed by the invention has simple steps, is low-cost, is high in yield and meets a requirement on environment protection; the prepared metallic 1T molybdenum disulfide nano-sheet array has excellent lithium storage performance, and has wide application prospect in lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a metallic 1T molybdenum disulfide nanosheet array and its preparation method and application. Background technique [0002] Transition metal sulfides are materials that realize lithium ion intercalation through conversion reactions, and have high theoretical capacity, but their cycle performance is poor. Among all the reported transition metal sulfides, molybdenum disulfide nanomaterials with graphite-like structure have attracted attention due to their potential applications in catalysis, hydrogen storage materials, lithium-ion electrode materials, etc. [0003] MoS 2 The molecular layer is composed of the middle layer of Mo atoms and the upper and lower layers of S atoms connected by strong covalent bonds, and the layers are stacked by weak van der Waals force. Molybdenum disulfide mainly has two crystal phases, one is the 2H phase with a triangular prism st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y30/00B82Y40/00H01M4/58H01M10/0525D06M11/53D06M101/40
CPCB82Y30/00B82Y40/00C01G39/06C01P2002/72C01P2002/82C01P2004/04C01P2004/62C01P2006/40D06M11/53D06M2101/40H01M4/5815H01M10/0525Y02E60/10
Inventor 吴明红湛晶潘登余吴宽施文彦徐刚
Owner SHANGHAI UNIV
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