Preparation method and application of multifunctional double-layer nanowire layered composite material

A layered composite material and nanowire technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, electrodes, etc., can solve the problems of limiting large-scale practical applications, high cost and scarcity, and achieve high surface capacitance characteristics, high production efficiency, and low equipment requirements

Active Publication Date: 2020-04-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pt-based materials are currently recognized as the most effective HER electrocatalysts, while Ru / Ir oxides are highly active OER electrocatalysts, but high cost and scarcity almost limit their large-scale practical applications.

Method used

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  • Preparation method and application of multifunctional double-layer nanowire layered composite material
  • Preparation method and application of multifunctional double-layer nanowire layered composite material
  • Preparation method and application of multifunctional double-layer nanowire layered composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Put 10 mg of graphene oxide into 30 mL of distilled water by ultrasound, after ultrasonication for 1 h to form a uniform brown solution, add 30 mg of ascorbic acid, after ultrasonic stirring, place the cleaned nickel foam in the dispersion, and put it in a water bath at 90 °C After deposition for 6 hours under the same conditions, the surface of the sample was rinsed with deionized water after removal, and dried at 60 °C for 12 h to obtain rGO / NF.

Embodiment 2

[0029] Put rGO / NF in 1.019g Co(NO 3 ) 2 ·6H 2 O and 1.051g urea were mixed to form a 35mL homogeneous solution, which was fully reacted in a box furnace at 120°C for 10h to form a CoO nanowire precursor; the precursor was placed in a solution containing 1.5mmol Co(NO 3 ) 2 ·6H 2 O, 1.5mmol Ni(NO 3 ) 2 ·6H 2 0, 15mmol urea and 8mmol ammonium fluoride 30mL homogeneously mixed solution, transferred to polytetrafluoroethylene lining and placed in a 140 ℃ box furnace to react, keep warm for 6h, take out the sample to obtain the double-layer nanowire precursor, after 400 °C annealing to obtain layered CoNiO 2 / CoO-140-400 material.

Embodiment 3

[0031] Put rGO / NF in 1.019g Co(NO 3 ) 2 ·6H 2 O and 1.051g urea were mixed to form a 35mL homogeneous solution, which was fully reacted in a box furnace at 120°C for 10h to form a CoO nanowire precursor; the precursor was placed in a solution containing 1.5mmol Co(NO 3 ) 2 ·6H 2 O, 1.5mmol Ni(NO 3 ) 2 ·6H 2 30mL homogeneously mixed solution of 0, 15mmol urea and 8mmol ammonium fluoride was transferred to a polytetrafluoroethylene lining and placed in a 120°C box-type furnace for reaction. °C annealing to obtain layered CoNiO 2 / CoO-120-400 material.

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Abstract

The invention discloses a preparation method and application of a multifunctional double-layer nanowire layered composite material, belongs to the technical field of chemical materials, and aims to provide a preparation method and application of the multifunctional double-layer nanowire layered composite material with low overpotential, high surface capacitance, good rate capability and good stability. The preparation method comprises putting foam nickel loaded with redox graphene into a mixed solution of cobalt nitrate and urea, carrying out heat preservation at 120 DEG C for 10 hours to react to form a CoO nanowire precursor, putting the precursor into a mixed solution containing cobalt nitrate, nickel nitrate, urea and ammonium fluoride, putting the mixed solution into a box-type furnace at 120-160 DEG C, keeping the temperature for 6 hours, taking out a sample to obtain a double-layer nanowire precursor, and carrying out annealing at 300-500 DEG C to obtain the multifunctional double-layer nanowire layered composite material. The material is rich and easily available in raw material reserves, low in price, excellent in performance, small in overpotential, large in surface capacitance, high in rate capability and relatively good in cycling stability.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a preparation method and application of a multifunctional double-layer nanowire layered composite material. Background technique [0002] In the existing world energy pattern, traditional energy sources such as coal, oil, and natural gas still occupy a considerable proportion. Excessive consumption of fossil fuels has caused serious energy shortages and environmental pollution, which has prompted researchers to explore energy conversion and storage devices. Environmentally friendly electrochemical energy systems, including electrochemical total hydrolysis and supercapacitors, are considered to be the core of future energy conversion and storage technologies. [0003] Hydrogen, as an environmentally friendly renewable energy, can be obtained by splitting water. Water splitting is widely regarded as a promising and attractive route for large-scale hydrogen e...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G51/04C25B1/04C25B11/04H01G11/24H01G11/26H01G11/30H01G11/36H01G11/46H01G11/86
CPCC01G53/04C01G51/04H01G11/30H01G11/36H01G11/46H01G11/26H01G11/24H01G11/86C25B1/04C01P2002/72C01P2004/03C01P2004/62C25B11/091Y02E60/36
Inventor 轩海成管亚玉李红盛梁小红韩培德
Owner TAIYUAN UNIV OF TECH
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