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N/O co-doped molybdenum sulfide and porous carbon composite electrode material and preparation method and application thereof

A composite electrode and molybdenum sulfide technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems such as insufficient rate capacity and low energy density obstacles, and achieve improved false capacitance, huge power density, and preparation methods easy effect

Active Publication Date: 2022-03-08
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although significant progress has been made in improving the capacitive properties of carbon materials, insufficient rate capacity and low energy density still hinder their application in the preparation of advanced supercapacitors

Method used

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  • N/O co-doped molybdenum sulfide and porous carbon composite electrode material and preparation method and application thereof
  • N/O co-doped molybdenum sulfide and porous carbon composite electrode material and preparation method and application thereof
  • N/O co-doped molybdenum sulfide and porous carbon composite electrode material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A preparation method of N / O co-doped molybdenum sulfide@porous carbon composite electrode material, comprising the following steps:

[0044] (1) Take 0.242g sodium molybdate (1mmol) and 0.228g thiourea (3mmol), pour them into a PTFE inner sleeve with a volume of 100mL, add deionized water to make the volume account for the PTFE inner sleeve 60% of the total volume of the sleeve, then ultrasonically mix it at 100W for 10 minutes, then place the inner sleeve in a stainless steel outer sleeve and seal it, keep it warm at 200°C for 24 hours, and wash it repeatedly with ethanol and deionized water 3 times to obtain a black substance, then dry overnight in a vacuum oven at 80°C to obtain molybdenum disulfide;

[0045] (2) Take 3g of sodium alginate and 1g of urea and evenly disperse it in the aqueous solution, stir it at a high speed by mechanical stirring (300ppm / 12h) to better disperse the sodium alginate evenly, and then add the solution of step (1) The molybdenum disulfi...

Embodiment 2

[0049] A preparation method of N / O co-doped molybdenum sulfide@porous carbon composite electrode material, comprising the following steps:

[0050] (1) Take 0.238g of potassium molybdate (1mmol) and 0.3g of L-cysteine ​​(2.5mmol), pour them into a PTFE inner sleeve with a volume of 100mL, add deionized water to make the volume account for 60% of the total volume of the polytetrafluoroethylene inner sleeve, and then ultrasonically mix it at 100W for 10 minutes to make it evenly mixed, then place the inner sleeve in a stainless steel outer sleeve and seal it. 1. Repeatedly washing with deionized water 3 times to obtain a black substance, then drying overnight in a vacuum oven at 80°C to obtain molybdenum disulfide;

[0051] (2) Take 1g of potassium alginate and 2.5g of melamine and evenly disperse it in the aqueous solution, and stir it at a high speed by mechanical stirring (300ppm / 12h) to better disperse the sodium alginate evenly, and then add step (1) The molybdenum disulfi...

Embodiment 3

[0055] A preparation method of N / O co-doped molybdenum sulfide@porous carbon composite electrode material, comprising the following steps:

[0056] (1) Get 1.236g of ammonium molybdate tetrahydrate (1mmol), 0.225g of thioacetamide (3mmol), pour it into a polytetrafluoroethylene inner sleeve with a volume of 100mL, add deionized water to make the volume account for polytetrafluoroethylene 60% of the total volume of the tetrafluoroethylene inner sleeve, and then ultrasonically mix it at 100W for 10 minutes to make it evenly mixed, then place the inner sleeve in a stainless steel outer sleeve and seal it, keep it warm at 220°C for 20 hours, use ethanol, Deionized water was repeatedly washed 3 times to obtain a black substance, and then dried overnight in a vacuum oven at 80°C to obtain molybdenum disulfide;

[0057] (2) Take 1g of lignin and 2g of melamine and evenly disperse them in the aqueous solution, stir them at a high speed by mechanical stirring (300ppm / 12h) to better dis...

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Abstract

The invention relates to the technical field of supercapacitor electrode materials, in particular to an N / O co-doped molybdenum sulfide and porous carbon composite electrode material and a preparation method and application thereof. Nitrogen and oxygen atoms are co-doped and compounded with molybdenum sulfide, the nitrogen atoms provide more electron active sites, the electron transmission speed of porous carbon is improved, the oxygen atoms are oxidized / reduced to improve the false capacitance of the electrode, the porous carbon provides a cross-linked pore structure with a large specific surface area, and the electrochemical performance of the electrode is improved. Molybdenum disulfide is attached to porous carbon, the synergistic effect of molybdenum disulfide and porous carbon is improved, then the conductivity is further improved, the porous carbon and heteroatoms are subjected to doping modification, and the porous carbon is compounded with transition metal sulfide, so that the advantages of efficient cycling stability and huge power density of the porous carbon are brought into play; the material prepared by the invention is environment-friendly, green, simple and easy to obtain, and simple and effective to operate.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to N / O co-doped molybdenum sulfide@porous carbon composite electrode materials and their preparation methods and applications. Background technique [0002] In recent years, conductive polymer hydrogels (CPHs) have attracted much attention in wearable electronic devices such as motion sensors, artificial skin, energy storage devices, and soft robots due to their excellent ionic and electrical conductivity, deformable mechanical properties Broad scientific interest; for most wearable electronic devices, mechanical behavior is an integral aspect to obtain human-friendly interfaces with contact capabilities, so in the material selection and functional design of flexible electronic devices, combining flexibility, stretchability And compressibility is very important. [0003] Chlorinated paraffin is usually composed of a hydrophilic polymer matrix ...

Claims

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Application Information

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IPC IPC(8): H01G11/34H01G11/86H01G11/24H01G11/26H01G11/30H01G11/44
CPCH01G11/34H01G11/86H01G11/30H01G11/26H01G11/24H01G11/44Y02E60/13Y02E60/10H01G11/32
Inventor 李明贾文汉
Owner GUILIN UNIVERSITY OF TECHNOLOGY