Method for synthesizing self-assembled VSe2 nanosheets

A synthesis method and self-assembly technology, applied in chemical instruments and methods, electrolysis components, hydrogen production, etc., can solve the problems of destroying VSe2 structure, volume change, reducing VSe2 specific capacity and cycle stability, etc. The reaction is fully carried out and is conducive to the effect of electron transport

Active Publication Date: 2019-01-29
SHAANXI UNIV OF SCI & TECH
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an anode material, VSe 2 There are also some defects. During the electrochemical performance test, a large amount of sodium ion deintercalation will cause VSe 2 The volume change, and then destroy the VSe 2 structure, lowering the VSe 2 specific capacity and cycle stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesizing self-assembled VSe2 nanosheets
  • Method for synthesizing self-assembled VSe2 nanosheets
  • Method for synthesizing self-assembled VSe2 nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Insulate carbon cloth (1cm×3cm) at 120°C for 1 hour under nitric acid reflux, cool to room temperature, wash with water and alcohol several times, and vacuum dry for later use;

[0032] 2) Weigh selenourea and vanadium pentoxide at a molar ratio of 5:1, i.e. the masses are 615.10 mg and 182.00 mg respectively, and dissolve them in a solution composed of deionized water and absolute ethanol with a volume ratio of 2:1 (total 30mL), magnetically stirred for 1h, and then put in the treated carbon cloth (CC) to obtain the mixed solution;

[0033] 3) Transfer the resulting mixed solution in step 2) to a 50mL high-temperature and high-pressure reactor with a polyparaphenylene liner, then add 0.030g of polyvinylpyrrolidone and 0.400g of hexadecyl to the reactor Trimethylammonium bromide, 0.015g of ammonium fluoride morphology control agent, the reaction kettle is sealed, placed in an oven at 220 ° C for 20h;

[0034] 4) After the reaction is finished, after cooling down to ...

Embodiment 2

[0038] 1) Insulate carbon cloth (1cm×3cm) at 120°C for 1 hour under nitric acid reflux, cool to room temperature, wash with water and alcohol several times, and vacuum dry for later use;

[0039] 2) Weigh selenourea and ammonium metavanadate with a molar ratio of 3:1, i.e. the masses are 369.05 mg and 116.98 mg respectively, and dissolve it in a solution composed of deionized water and absolute ethanol with a volume ratio of 3:1 (total 30mL), magnetically stirred for 1h, and then put in the treated carbon cloth (CC) to obtain the mixed solution;

[0040] 3) Transfer the resulting mixed solution in step 2) to a 50mL high-temperature and high-pressure reactor with a polyparaphenylene liner, then add 0.363g of polyvinylpyrrolidone and 0.355g of hexadecyl to the reactor Trimethylammonium bromide, 0.025g of ammonium fluoride morphology control agent, seal the reaction kettle, place in an oven and react at 180°C for 25h;

[0041] 4) After the reaction is finished, cool down to room...

Embodiment 3

[0045] 1) Insulate carbon cloth (1cm×3cm) at 120°C for 1 hour under nitric acid reflux, cool to room temperature, wash with water and alcohol several times, and vacuum dry for later use;

[0046] 2) Weigh selenourea and ammonium metavanadate at a molar ratio of 2:1, i.e. the masses are 246.04 mg and 157.30 mg respectively, and dissolve it in a solution composed of deionized water and absolute ethanol with a volume ratio of 1:1 (total 30mL), magnetically stirred for 1h, and then put in the treated carbon cloth (CC) to obtain the mixed solution;

[0047] 3) Transfer the resulting mixed solution in step 2) to a 50mL high-temperature and high-pressure reactor with a polyparaphenylene liner, then add 0.025g of polyvinylpyrrolidone and 0.455g of hexadecyl to the reactor Trimethylammonium bromide, 0.005g of ammonium fluoride morphology control agent, seal the reaction kettle, place in an oven and react at 210°C for 21h;

[0048] 4) After the reaction is finished, cool down to room t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for synthesizing self-assembled VSe2 nanosheets. The method comprises the steps: (1) performing pretreatment of carbon cloth; (2) weighing selenourea and a vanadium source, dissolving the weighed selenourea and vanadium source in 30 mL of a solution, performing magnetic and uniform stirring, and then putting the treated carbon cloth (CC) so as to obtain a mixed liquid; and (3) transferring the mixed liquid obtained in the step (2) to a 50 mL high-temperature high-pressure reactor with a para-polybenzene lining, then adding an ammonium fluoride morphology regulating agent to the reactor, sealing the reactor, and placing the sealed reactor in an oven for a hydrothermal reaction; and performing natural cooling to room temperature, taking the carbon cloth out,and performing rinsing and vacuum drying so as to obtain a self-assembled VSe2/CC nanosheet array self-supporting electrode. Through adoption of the hydrothermal method, the advantages of a simple process, a short preparation cycle and easily controllable reaction conditions are achieved, and the reaction process and the morphology and size can be controlled through adjustment of the temperature,so that multiple special morphology structures are obtained, and different morphological features have great influences on the properties of the material.

Description

technical field [0001] The invention belongs to the field of new energy material preparation and relates to a self-assembled VSe 2 Synthesis of nanosheets. Background technique [0002] In recent years, graphene, as a new nanomaterial with the thinnest thickness, the highest strength, and the best electrical and thermal conductivity discovered so far, has immediately aroused the enthusiasm of researchers in the field of materials for two-dimensional nanomaterials such as graphene and graphene-like materials. sought after. Graphene's excellent electrical conductivity stems from its ultra-high electron mobility, and its outstanding mechanical properties stem from the SP formed by regularly arranged carbon atoms in its lattice. 2 hybridization. Two-dimensional transition metal dichalcogenides (TMDs) are an important member of new two-dimensional atomic crystal materials with graphene-like properties. Their unique physical, chemical properties and structural advantages make i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04C01B3/02B01J27/057C25B1/04C25B11/06
CPCB01J27/0573C01B3/02C01B19/007C25B1/04C25B11/04Y02E60/36
Inventor 曹丽云何丹阳冯亮亮黄剑锋吴建鹏杨丹
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap