Carbon fiber/NiCo2O4/graphene composite material preparation method

A composite material and carbon fiber technology, applied in the field of nanomaterials, can solve the problems of electrochemical performance restriction, theoretical capacity gap, poor electrical conductivity, etc., and achieve the effect of improving electrochemical performance.

Inactive Publication Date: 2018-09-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the NiCo 2 o 4 Poor electrical conductivity restricts its electrochemical performance, and there is still a large gap with the theoretical capacity. How to effectively improve carbon fiber / NiCo 2 o 4 The conductivity of flexible electrode materials has become an urgent problem to be solved

Method used

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  • Carbon fiber/NiCo2O4/graphene composite material preparation method
  • Carbon fiber/NiCo2O4/graphene composite material preparation method
  • Carbon fiber/NiCo2O4/graphene composite material preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 0.001mol Co(NO 3 ) 2 ·6H 2 O, 0.0005mol Ni(NO 3 ) 2 ·6H 2 O and 0.01mol urea were dissolved in a mixed solution of 25ml of distilled water and 25ml of ethanol, dispersed evenly by ultrasonic, the mixture was transferred to a reaction kettle, added carbon fiber, and reacted at 130°C for 8h, the resulting product was cleaned with distilled water and dried to obtain surface-supported nickel Carbon fiber of cobalt precursor; add 0.002mol urea to 50ml of 0.2mg / ml porous graphene oxide aqueous solution, ultrasonically treat for 6h, transfer the mixture into a reaction kettle, add carbon fiber loaded with nickel-cobalt precursor, and heat at 180°C React for 6h, then dry at 60°C for 12h; finally, heat-treat the resulting product in a tube furnace at 300°C for 3h to obtain carbon fiber / NiCo 2 o 4 / graphene composites. The carbon fiber / NiCo prepared in this embodiment 2 o 4 / Graphene composite materials are used in supercapacitor electrodes to test their electrochemical...

Embodiment 2

[0027] 0.003mol CoCl 2 ·6H 2 O, 0.0015mol NiCl 2 ·6H 2O and 0.02mol urea were dissolved in a mixed solution of 25ml distilled water and 25ml ethanol, dispersed evenly by ultrasonic, the mixture was transferred to a reaction kettle, carbon fiber was added, and reacted at 120°C for 9h, the obtained product was cleaned with distilled water and dried to obtain surface-supported nickel Carbon fiber of cobalt precursor; add 0.006mol urea to 50ml of 0.5mg / ml porous graphene oxide aqueous solution, sonicate for 6h, transfer the mixture into a reaction kettle, add carbon fiber loaded with nickel-cobalt precursor, and heat at 120°C Reaction for 10 h, followed by drying at 60 °C for 12 h; finally, heat treatment of the obtained product in a tube furnace at 400 °C for 1 h to obtain carbon fiber / NiCo 2 o 4 / graphene composites. The carbon fiber / NiCo prepared in this embodiment 2 o 4 / Graphene composites are used in supercapacitor electrodes to test their electrochemical performance...

Embodiment 3

[0029] 0.004mol Co(NO 3 ) 2 ·6H 2 O, 0.002mol Ni(NO 3 ) 2 ·6H 2 O and 0.024mol urea were dissolved in a mixed solution of 25ml distilled water and 25ml ethanol, dispersed evenly by ultrasonic, the mixture was transferred to a reaction kettle, carbon fiber was added, and reacted at 100°C for 10h. The obtained product was cleaned with distilled water and dried to obtain surface loading Carbon fibers of nickel-cobalt precursors; add 0.003mol urea to 50ml of 0.4mg / ml porous graphene oxide aqueous solution, ultrasonically treat for 6h, transfer the mixture into a reactor, add carbon fibers loaded with nickel-cobalt precursors, and heat at 150°C The reaction was carried out at 60°C for 8h, and then dried at 60°C for 12h; finally, the product was heat-treated in a tube furnace at 300°C for 2h to obtain carbon fiber / NiCo 2 o 4 / graphene composites. The carbon fiber / NiCo prepared in this embodiment 2 o 4 / Graphene composite materials are used in supercapacitor electrodes to t...

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Abstract

The invention discloses a carbon fiber / NiCo2O4 / graphene composite material preparation method, and belongs to the technical field of nano-materials. The method adopts structural carbon fibers as a base, and performs in situ synthesis to obtain a multistage micro-nano structure that NiCo2O4 nano wires and porous graphene interlace and interpenetrate with each other on the surface of the carbon fiber through a hydrothermal method. The advantages of the method are that energy storage characteristics of the conductive carbon fiber, the NiCo2O4 nano wires and the porous graphene can be fully performed, and the multistage micro-nano structure can give full play to the synergistic effect among the three. The carbon fiber / NiCo2O4 / graphene composite material prepared through the method can be usedas a super capacitor electrode material. When the current density is 1 A / g, the specific capacity can be up to 1120.74. The material has great application potential in flexible energy storage electrode materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a carbon fiber / NiCo 2 o 4 / The preparation method of graphene composite material. Background technique [0002] As an important flexible energy storage device, flexible supercapacitors are endowed with stretchable, bendable and windable properties while maintaining the characteristics of traditional supercapacitors such as high power density, fast charge and discharge, and long cycle life. Such mechanical properties have great potential for development, and the preparation of flexible electrodes with excellent electrochemical properties is the key to obtaining high-performance flexible supercapacitors; carbon fibers not only have excellent properties such as high strength, high modulus, and low density, but also have excellent electrical conductivity. Properties, flexibility, chemical stability and inherent properties of carbon materials have become the research hotspots ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/40H01G11/36H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/40H01G11/86
Inventor 李素敏江徽杨康罗南辉李松军
Owner JIANGSU UNIV
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