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A preparation method of nickel cobaltate/nickel tungstate/polyaniline ternary composite nanowire array electrode

A nanowire array, ternary composite technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of overall electrochemical performance decline, improve diffusion mass transfer performance, increase active surface The effect of improving utilization

Inactive Publication Date: 2018-12-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study found that a single electrode material tends to degrade the overall electrochemical performance due to certain deficiencies

Method used

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  • A preparation method of nickel cobaltate/nickel tungstate/polyaniline ternary composite nanowire array electrode
  • A preparation method of nickel cobaltate/nickel tungstate/polyaniline ternary composite nanowire array electrode
  • A preparation method of nickel cobaltate/nickel tungstate/polyaniline ternary composite nanowire array electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Accurately weigh 1mmol nickel nitrate, 2mmol cobalt nitrate and 8mmol urea, dissolve in 40mL deionized water and stir until clear, then transfer to a 50mL hydrothermal reactor, and put a piece of treated foamed nickel, seal and react at 130℃ 6h. After natural cooling, the foamed nickel was taken out, washed alternately with absolute ethanol and deionized water for 3 times, vacuum dried at 60°C for 12 hours, and finally calcined at 350°C for 2 hours to obtain a nickel cobaltate nanowire array.

[0022] Accurately weigh 1mmol of nickel nitrate, 1mmol of sodium tungstate and 6mmol of urea, dissolve in 40mL of deionized water and stir until they are evenly mixed, then transfer the mixed solution into a 50mL PTFE-lined stainless steel hydrothermal reactor, and get the result The nickel cobaltate nanowire array foam nickel substrate was put into it, and the reaction was kept at 130°C for 6h after sealing. After cooling to room temperature, the nickel foam was taken out, washed ...

Embodiment 2

[0026] Accurately weigh 1mmol nickel nitrate, 2mmol cobalt nitrate and 8mmol urea, dissolve in 40mL deionized water and stir until clear, then transfer to a 50mL hydrothermal reactor, and put in a piece of treated foamed nickel, seal and react at 110℃ 4h. After natural cooling, the nickel foam was taken out, washed with anhydrous ethanol and deionized water alternately 3 times, vacuum dried at 60°C for 12h, and finally calcined at 400°C for 2h to obtain a nickel cobaltate nanowire array.

[0027] Accurately weigh 1mmol of nickel nitrate, 1mmol of sodium tungstate and 6mmol of urea, dissolve in 40mL of deionized water and stir until they are evenly mixed, then transfer the mixed solution into a 50mL PTFE-lined stainless steel hydrothermal reactor, and get the result The nickel cobaltate nanowire array foam nickel substrate was put into it, and after sealing, it was reacted at 110°C for 4 hours. After cooling to room temperature, take out the foamed nickel, wash alternately with a...

Embodiment 3

[0030] Accurately weigh 1mmol nickel nitrate, 2mmol cobalt nitrate and 8mmol urea, dissolve in 40mL deionized water and stir until clear, then transfer to a 50mL hydrothermal reactor, and put a piece of treated foamed nickel, seal and react at 150℃ 8h. After natural cooling, the foamed nickel was taken out, washed alternately with absolute ethanol and deionized water for 3 times, vacuum dried at 60°C for 12 hours, and finally calcined at 350°C for 2 hours to obtain a nickel cobaltate nanowire array.

[0031] Accurately weigh 1mmol of nickel nitrate, 1mmol of sodium tungstate and 6mmol of urea, dissolve in 40mL of deionized water and stir until they are evenly mixed, then transfer the mixed solution into a 50mL PTFE-lined stainless steel hydrothermal reactor, and get the result The nickel cobaltate nanowire array foam nickel substrate was put into it, and the temperature was kept at 150°C for 8 hours after sealing. After cooling to room temperature, the nickel foam was taken out,...

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Abstract

The invention provides a preparation method of a nickel cobalt oxide / nickel tungsten oxide / polyaniline three-element composite nanowire array electrode. The preparation method comprises following steps of step 1, preparaing a nickel cobalt oxide nanowire array; step 2, preparing a nickel cobalt oxide / nickel tungsten oxide nuclear shell nanowire array; step 3, preparing the nickel cobalt oxide / nickel tungsten oxide / polyaniline three-element composite nanowire array electrode. According to the invention, by adopting the hydrothermal synthesis technology, and taking the foaming nickel with the good conductivity and a special loosened and multi-hole structure as a substrate, the nickel cobalt oxide / nickel tungsten oxide nuclear shell nanowire array is prepared through two hydrothermal steps, so a tedious electrode sheet preparation process is avoided, use rate of active materials can be effectively improved, the active surface is enlarged and diffusion and mass transfer performance of the material is improved. A by deposing the polyaniline on the surface of the nickel cobalt oxide / nickel tungsten oxide nuclear shell nanowire array through a simple chemical polymerization method, the nickel cobalt oxide / nickel tungsten oxide / polyaniline three-element composite nanowire array electrode can be obtained.

Description

Technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, and particularly relates to a preparation method of a ternary composite nanowire array electrode material of nickel cobaltate / nickel tungstate / polyaniline. Background technique [0002] With the continuous development of human society and the continuous advancement of science and technology, the demand for energy and resources of mankind is increasing. Therefore, there is an urgent need for some efficient, clean and sustainable energy sources and new technologies to store and convert energy. Supercapacitors have the advantages of high power density, fast charging and discharging process, long life, low cost, environmental friendliness and safety, and have become a new research hotspot that people pay close attention to in recent years. [0003] Supercapacitor electrode material is its key component. Studies have found that a single electrode material tends to reduce the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/48H01G11/86
CPCY02E60/13
Inventor 吴方胜黎肇英郝臣王晓红高海文周赛赛黎郡王莹莹
Owner JIANGSU UNIV
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