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NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth and preparation method thereof

A technology of carbon fiber cloth and nanotubes, which is applied in the field of nanomaterial preparation, can solve the problems of dense accumulation of materials inside electrodes, large internal resistance, unfavorable supercapacitive performance, and thick nanotube diameters, etc., to improve high-current charging and discharging capabilities , Improve the efficiency of charging and discharging, and the effect of high proportion

Inactive Publication Date: 2015-07-15
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, for NiCo 2 o 4 There are also studies on nanotube materials, but they are mainly prepared by electrospinning. The diameter of nanotubes prepared by this method is thick, and the residual organic matter will reduce the NiCo 2 o 4 The conductivity of the supercapacitor electrode is generally mixed with chemical glue and conductive agent. The internal material of the electrode is densely packed and the internal resistance is large. These factors reduce the nano-NiCo 2 o 4 The nano-size effect is not conducive to the further improvement of supercapacitor performance
Furthermore, although NiCo 2 o 4 The conductivity is high, but compared with carbon materials and noble metal oxides, the conductivity is still not high enough. The specific capacitance decays faster at high current densities, and the rate performance is poor. Existing research or composites with high-conductivity materials, such as carbon nanometers tube, graphene, etc., or NiCo 2 o 4 Direct growth on metal substrates such as nickel foam, but limited by NiCo 2 o 4 Due to the limitations of material structure and substrate material, the improvement of supercapacitor performance is limited

Method used

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  • NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth and preparation method thereof
  • NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth and preparation method thereof
  • NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 0.32g Ni(NO 3 ) 2 ·6H 2 O, 0.53g CoCl 2 ·6H 2 O, 2.97g CO(NH 2 ) 2 and 1.1g N 4 (CH 2 ) 6 Dissolve in 100mL deionized water until completely dissolved to form a clear pink solution; then transfer 60mL of the solution to a 100mL autoclave, and clean a piece of 2×2cm 2 Place the carbon fiber cloth in the solution, seal the reaction kettle and put it in an oven, heat it to 95°C, hold for 8 hours, take out the carbon fiber cloth after the hydrothermal reaction, wash it with deionized water, dry it at 70°C, and then place it in an inert gas Annealing treatment was carried out in a quartz tube furnace under protection, the heating temperature was 350°C, and the holding time was 3h. After cooling to room temperature, the sample was taken out, and the SEM pattern analysis found that, as figure 1 and 2 As shown, NiCo grown on carbon fiber cloth 2 o 4 It is in the form of nanotubes, the inner diameter of the tube is about 40nm, the wall thickness of the tube is a...

Embodiment 2

[0025] Take 0.29g Ni(NO 3 ) 2 ·6H 2 O, 0.48g CoCl 2 ·6H 2 O, 2.50g CO(NH 2 ) 2 and 1g N 4 (CH 2 ) 6 Dissolve in 100mL deionized water until completely dissolved to form a clear pink solution; then transfer 80mL of the solution to a 100mL autoclave, and clean a piece of 2×2cm 2 Place the carbon fiber cloth in the solution, seal the reaction kettle, put it into the oven, heat it to 100°C, and keep it warm for 8 hours. Take out the carbon fiber cloth after the hydrothermal reaction, wash it with deionized water, dry it at 70°C, and then place it in an inert gas Annealing treatment in a quartz tube furnace under protection, the heating temperature is 380 °C, and the holding time is 2 hours. 2 o 4 The nanocrystalline particle size of the mesoporous nanotube material is about 5-10nm, the mesopore size is about 2-5nm, the tube inner diameter is about 30nm, the tube wall thickness is about 16nm, the tube length is about 0.9μm, and the aspect ratio is about 300.

Embodiment 3

[0027] Take 0.26g Ni(NO 3 ) 2 ·6H 2 O, 0.43g CoCl 2 ·6H 2 O, 2.43g CO(NH 2 ) 2 and 0.9g N 4 (CH 2 ) 6 Dissolve in 100mL deionized water until completely dissolved to form a clear pink solution; then transfer 80mL of the solution to a 100mL autoclave, and clean a piece of 2×2cm 2 Place the carbon fiber cloth in the solution, seal the reaction kettle, put it into the oven, heat it to 105°C, keep it for 6 hours, and dry it at 70°C; then place it in a quartz tube furnace under the protection of inert gas for annealing treatment, and the heating temperature is 300°C , the holding time is 6h, the sample is taken out after cooling to room temperature, and its SEM pattern analysis shows that the NiCo grown on the carbon fiber cloth 2 o 4 The nanocrystalline grain size of the mesoporous nanotube material is about 5-10nm, the mesopore size is about 2-5nm, the tube inner diameter is about 20nm, the tube wall thickness is about 12nm, the tube length is 0.6μm, and the aspect rati...

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Abstract

The invention discloses a NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth. The NiCo2O4 mesoporous nanotube material grows on a carbon fiber cloth substrate and is composed of NiCo2O4 nano crystals with a particle size of 5 to 10 nm; the internal diameter of the NiCo2O4 mesoporous nanotube material is 20 to 50 nm, the wall thickness is 10 to 20 nm, the tube length is 0.5 to 2.0 [mu]m, and the length / diameter ratio is 250 to 1000; the mesopores are gaps between the NiCo2O4 nano crystals and the size of the mesopores is in a range of 2 to 5 nm. The invention further provides a preparation method of the NiCo2O4 mesoporous nanotube material. By precisely controlling the hydrothermal reaction conditions, the NiCo2O4 mesoporous nanotube material with a special structure can grow on carbon fiber cloth. The NiCo2O4 mesoporous nanotube material can be used to produce the electrode of a super capacitor, and has the advantages of high specific capacitance, rate capability under a large current density, and long-term cycle performance.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a NiCo grown on carbon fiber cloth 2 o 4 Mesoporous nanotube materials and methods for their preparation. Background technique [0002] Transition metal oxides such as NiO, Co 3 o 4 , MnO 2 、NiCo 2 o 4 It is rich in resources, low in price, high in theoretical specific capacitance, and good in electrochemical reversibility. It is considered to be a promising electrode material for supercapacitors. Among them, the binary transition metal oxide NiCo with spinel structure 2 o 4 Due to its high theoretical specific capacity, stable structure, and good cycle performance, it has received extensive attention. Since the pseudocapacitive reaction mainly occurs on the surface of the material, the material with a higher specific surface area will have a higher actual specific capacitance, and the performance of high-current charge and discharge will be better, so NiCo 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00B82Y30/00
Inventor 袁永锋余大江郭绍义
Owner ZHEJIANG SCI-TECH UNIV
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