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Preparation methods of porous carbon fiber/metal oxide composite material and graphene-based conductive ink and application of graphene-based conductive ink in supercapacitor

A porous carbon fiber, supercapacitor technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of limited effective sites, high cost, and difficulty in graphene agglomeration, achieve a large voltage window, reduce The effect of excellent production cost and electrochemical energy storage performance

Active Publication Date: 2021-10-01
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphene-based composite materials also face a series of problems such as easy agglomeration and difficult dispersion of graphene, limited effective sites for compounding with metal oxides, and high cost.

Method used

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  • Preparation methods of porous carbon fiber/metal oxide composite material and graphene-based conductive ink and application of graphene-based conductive ink in supercapacitor
  • Preparation methods of porous carbon fiber/metal oxide composite material and graphene-based conductive ink and application of graphene-based conductive ink in supercapacitor
  • Preparation methods of porous carbon fiber/metal oxide composite material and graphene-based conductive ink and application of graphene-based conductive ink in supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Porous Carbon Fiber / Fe 2 o 3 The preparation method of composite material, comprises the following steps:

[0047] (1) Cut 2g of absorbent cotton and place it in the ark, then place the ark in a tube furnace, raise the temperature to 1000°C at a rate of 10°C / min in an Ar gas atmosphere, and keep it for 120min, and grind it into powder after cooling Body, namely obtain porous carbon fiber (hollow porous carbon fiber), the SEM figure of porous carbon fiber is as follows figure 1 shown in a, b, c;

[0048] (2) Weigh 9g of Fe(NO 3 ) 3 9H 2 O was dissolved in 10ml of deionized water and stirred to obtain Fe(NO 3 ) 3 solution;

[0049] (3) Weigh 100 mg of porous carbon fiber and place it in Fe(NO 3 ) 3 In the solution, stir and disperse evenly, ultrasonic for 30min, then keep stirring at 25°C for 10h, then centrifuge at 12000r / min for 5min, and then dry at 70°C for 6h, the porous carbon fiber / Fe(NO 3 ) 3 powder;

[0050] (4) Porous carbon fiber / Fe(NO 3 ) 3 Put ...

Embodiment 2

[0060] The preparation method of porous carbon fiber / NiO composite material comprises the following steps:

[0061] (1) Cut 2g of absorbent cotton and place it in the ark, then place the ark in a tube furnace, raise the temperature to 1000°C at a rate of 10°C / min in an Ar gas atmosphere, and keep it for 120min, and grind it into powder after cooling body, that is, porous carbon fibers are obtained;

[0062] (2) Weigh 5g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 10ml of deionized water and stirred to obtain Ni(NO 3 ) 2 solution;

[0063] (3) Weigh 100mg of porous carbon fiber and place it in Ni(NO 3 ) 2 In the solution, stir and disperse evenly, ultrasonic for 30min, then keep stirring at 25°C for 10h, then centrifuge at 12000r / min for 5min, then dry at 70°C for 6h, the porous carbon fiber / Ni(NO 3 ) 2 powder;

[0064] (4) Porous carbon fiber / Ni(NO 3 ) 2 The powder was placed in the ark, and then in a tube furnace, the temperature was raised to 450°C at a rate of 5°C / m...

Embodiment 3

[0066] The preparation method of porous carbon fiber / CoO composite material comprises the following steps:

[0067] (1) Cut 2g of absorbent cotton and place it in the ark, then place the ark in a tube furnace, raise the temperature to 1000°C at a rate of 10°C / min in an Ar gas atmosphere, and keep it for 120min, and grind it into powder after cooling body, that is, porous carbon fibers are obtained;

[0068] (2) Weigh 5g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 10ml of deionized water and stirred to obtain Co(NO 3 ) 2 solution;

[0069] (3) Weigh 100mg of porous carbon fiber and place it in Co(NO 3 ) 2 In the solution, stir and disperse evenly, ultrasonic for 30min, then keep stirring at 25°C for 10h, then centrifuge at 12000r / min for 5min, and then dry at 70°C for 6h, the porous carbon fiber / Co(NO 3 ) 2 powder;

[0070] (4) The porous carbon fiber / Co(NO 3 ) 2 The powder was placed in the ark, and then in a tube furnace, the temperature was raised to 450 °C at a rate...

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Abstract

The invention provides preparation methods of a porous carbon fiber / metal oxide composite material and a graphene-based conductive ink and an application of the graphene-based conductive ink in a supercapacitor. The preparation method of the composite material comprises the following steps: (1) carrying out high-temperature carbonization treatment on absorbent cotton at 900-1200 DEG C, cooling, and grinding to obtain porous carbon fibers; (2) placing the porous carbon fibers in a metal salt aqueous solution, stirring at a constant temperature, centrifuging, and drying to obtain a porous carbon fiber / metal salt composite material; and (3) roasting the composite material in a protective atmosphere, cooling, and grinding. According to the invention, the porous carbon fiber / metal oxide composite material which is uniform in compounding, high in metal oxide loading capacity, high in binding force and excellent in electrochemical energy storage performance can be prepared; and in order to realize printing of the composite electrode material, a small amount of graphene is added as a conductive channel between carbon fibers, and a water-based flexible supercapacitor based on the graphene-coated three-dimensional porous carbon fiber / metal oxide composite material is prepared by using a silk-screen printing method.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a preparation method of a porous carbon fiber / metal oxide composite material and a graphene-based conductive ink and an application in supercapacitors. Background technique [0002] With the rapid development of smart wearable electronics, the demand for thin, flexible and intelligent energy storage devices has increased. Due to the advantages of fast charging and discharging, large capacity, long life, flexibility and safety, flexible supercapacitors have broad prospects for development in the field of portable and wearable electronics. New electronic printing preparation technologies developed in recent years (such as inkjet printing, screen printing, 3D printing, etc.) have the advantages of simple operation, patterning and strong adaptability to flexible substrates. Among them, flexible supercapacitors can be prepared quickly, on a large scale and at low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/44H01G11/30H01G11/40H01G11/46H01G11/36H01G11/84
CPCH01G11/24H01G11/44H01G11/30H01G11/40H01G11/46H01G11/36H01G11/84Y02E60/13
Inventor 蒋昌忠曾帆宋先印
Owner HUNAN UNIV
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