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Supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube and preparation method thereof

A technology of multi-walled carbon nanotubes and supercapacitors, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve low specific capacitance, poor conductivity, impact Application and other issues, to achieve the effect of improving specific surface area and conductivity, low cost, improving specific capacitance and electrochemical stability

Inactive Publication Date: 2014-03-05
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with materials such as graphene and carbon nanotubes, MoS 2 The conductivity of the material is poor, which makes its specific capacitance relatively low, which affects the further application of the material in the energy field.

Method used

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  • Supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube and preparation method thereof
  • Supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube and preparation method thereof
  • Supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of molybdenum sulfide-multi-walled carbon nanotube composites

[0030] Weigh 0.017 g MWCNTs and add it into 40 mL double-distilled water, and obtain a uniformly dispersed MWCNTs suspension after ultrasonication; weigh 0.3 g Na 2 MoO 4 2H 2 Add O to the above mixture, ultrasonically disperse for 30 min, adjust the pH of the solution to 6.5 with 0.1 mol / L NaOH, add 0.8 g of L-cysteine, dilute to 80 mL with twice distilled water, and stir vigorously for 1 h , Add the above mixture into a 100 mL polytetrafluoroethylene hydrothermal reactor, and the filling degree of the reactor is 80%. The hydrothermal reactor was put into a blast drying oven, reacted at 180 °C for 48 h, and then the reactor was naturally cooled to room temperature. The resulting product was centrifuged and washed three times with twice distilled water and ethanol, respectively. Then the obtained product was put into a vacuum drying oven and dried at 80 °C for 20 h to obtain the molybden...

Embodiment 2

[0038] (1) Preparation of molybdenum sulfide-multi-walled carbon nanotube composites

[0039] Weighed 0.017 g MWCNTs and added it into 40 mL double-distilled water, and obtained a uniformly dispersed MWCNTs suspension after ultrasonication. Weigh 0.4 g Na 2 MoO 4 2H 2Add O to the above mixture, ultrasonically disperse for 30 min, adjust the pH of the solution to 6.5 with 0.1 mol / L NaOH, add 1.1 g of L-cysteine, dilute to 80 mL with twice distilled water, and stir vigorously for 1 h . The above mixture was added into a 100 mL polytetrafluoroethylene hydrothermal reaction kettle, and the filling degree of the reaction kettle was 80%. The hydrothermal reactor was put into a blast drying oven, reacted at 180 °C for 49 h, and then the reactor was naturally cooled to room temperature. The resulting product was centrifuged and washed three times with twice distilled water and ethanol, respectively. Then the obtained product was put into a vacuum drying oven and dried at 80 °C f...

Embodiment 3

[0043] (1) Preparation of molybdenum sulfide-multi-walled carbon nanotube composites

[0044] Weighed 0.017 g MWCNTs and added it into 40 mL double-distilled water, and obtained a uniformly dispersed MWCNTs suspension after ultrasonication. Weigh 0.5 g Na 2 MoO 4 2H 2 Add O to the above mixture, ultrasonically disperse for 30 min, adjust the pH of the solution to 6.5 with 0.1 mol / L NaOH, add 1.3 g of L-cysteine, dilute to 80 mL with twice distilled water, and stir vigorously for 1 h . The above mixture was added into a 100 mL polytetrafluoroethylene hydrothermal reaction kettle, and the filling degree of the reaction kettle was 80%. The hydrothermal reactor was put into a blast drying oven, reacted at 180 °C for 50 h, and then the reactor was naturally cooled to room temperature. The resulting product was centrifuged and washed three times with twice distilled water and ethanol, respectively. Then the obtained product was put into a vacuum drying oven and dried at 80 °C ...

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Abstract

The invention relates to a supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube and a preparation method of the supercapacitor electrode material molybdenum sulfide-multiwalled carbon nanotube. The preparation method includes the steps that MWCNTs is added to redistilled water and ultrasonically dispersed; Na2MoO4 2H2O is added, after even dispersion, the pH value of the solution is set to 6.5, L-cysteine is added, and the solution is diluted to 80mL by redistilled water and stirred vigorously for an hour; hydrothermal reaction is conducted on the mixture at the reaction temperature ranging from 160 DEG C to 200 DEG C for 48-50 hours; after the reaction, the mixture is naturally cooled to be at the indoor temperature, centrifuged, washed and dried, and then a molybdenum sulfide-multiwalled carbon nanotube composite material is acquired; the molybdenum sulfide-multiwalled carbon nanotube composite material is evenly mixed with carbon black and polytetrafluoroethylene, the surface of a stainless steel wire screen is evenly coated with the mixture, and a composite electrode material is prepared after vacuum drying. The prepared composite material combines the advantages of molybdenum sulfide with the advantages of the multiwalled carbon nanotube, specific capacitance and electrochemical stability are improved, and the composite material is a good supercapacitor material; the preparation method is easy and quick to implement and environmentally friendly, and the composite material prepared through the preparation method is low in cost.

Description

technical field [0001] The invention relates to a supercapacitor electrode material molybdenum sulfide-multi-wall carbon nanotube and a preparation method thereof. Background technique [0002] Supercapacitors, also known as ultra-large-capacity electrochemical capacitors, are a new type of energy storage device developed in recent years with performance between traditional capacitors and secondary batteries. Its main performance characteristics are: both the high specific energy of the secondary battery and the high specific power of the traditional capacitor; the power density can be as high as 1-10 kW / kg, which is equivalent to 5-10 times of the battery; the charging and discharging speed is fast, It can be charged and discharged within a few seconds to a few minutes, and the charge and discharge efficiency is high, generally ≥90%; the cycle life is long, up to one million times; the working temperature range is wide, and it can work in the environment of -40-70°C ; In a...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/24H01G11/46H01G11/86B82Y30/00B82Y40/00
Inventor 黄克靖刘彦明王兰王辉
Owner XINYANG NORMAL UNIVERSITY
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