Carbon composite material, and preparation method and application thereof

A technology of carbon composite materials and composite materials, applied in the field of materials, can solve problems such as the decline of electrical conductivity and mechanical properties, achieve high surface area and high conductivity, superior capacity and rate performance, and overcome the problems of high specific surface area and high conductivity Effect

Inactive Publication Date: 2014-12-03
JIANGSU JF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formed porous structure will lead to defects in the structure of amorphous carbon, resulting in the decline of electrical conductivity and mechanical properties

Method used

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  • Carbon composite material, and preparation method and application thereof
  • Carbon composite material, and preparation method and application thereof
  • Carbon composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of carbon composites, such as figure 1 As indicated, weigh 4 g of polyethylene powder and disperse it in 30 ml of water. 0.34 g of carbon nanotubes were added and stirred evenly; the mixture was heated at 120° C. for 2 hours, cooled to room temperature, and the product was collected. Mix the product and sodium hydroxide uniformly at a weight ratio of 1:2, transfer to a high-temperature furnace, and under the protection of an inert gas (argon, nitrogen, and helium in any ratio), heat to 600°C and react for 2 hours; cool to room temperature , the product was rinsed with deionized water, dried for 12 hours, and set aside.

[0024] The capacity and rate performance of the composite material are obtained by cyclic voltammetry test: Take the carbon composite material, conductive carbon black and LA132 with a weight ratio of 90:5:5, stir evenly, and coat on the surface of the aluminum foil pole piece. After the pole piece is dried and rolled, the thickness is con...

Embodiment 2

[0029] Weigh 4 grams of phenolic resin powder and disperse into 30 milliliters of water. Add 0.34 g of carbon fiber and stir well. After the mixture was heated at 150°C for 2 hours, the product was collected after cooling to room temperature. The product and KOH were mixed uniformly at a weight ratio of 1:3, then transferred to a high-temperature furnace, heated to 750°C under the protection of an inert gas (argon, nitrogen, and helium in any ratio), and then reacted for 1 hour. After cooling to room temperature, the product was rinsed with deionized water and dried for 12 hours before use. The specific surface area of ​​the composite material is 2200m 2 / g, the pore volume is higher than 0.5cm 3 / g, the conductivity is higher than 30S / cm, and the specific capacity of the product is higher than 130, 110, 90, 80, and 70F / g at 5, 10, 20, 50, and 100mV / s.

Embodiment 3

[0031] Weigh 10.625 g of sucrose powder and disperse into 30 ml of water. Add 0.34 g of carbon nanotube and graphene mixture (weight ratio 1:1) and stir evenly. After heating the mixture at 220°C for 2 hours, the product was collected after cooling to room temperature. The product and phosphoric acid (weight ratio 1:3) were evenly mixed in a weight ratio and then transferred to a high-temperature furnace, heated to 800°C under the protection of an inert gas (argon, nitrogen, and helium in any ratio) and reacted for 1 hour. After cooling to room temperature, the product was rinsed with deionized water and dried for 12 hours before use.

[0032] After testing, the specific surface area of ​​the composite material is 2000m 2 / g, the pore volume is higher than 0.5cm 3 / g, conductivity higher than 30S / cm. The specific capacities of the composites are higher than 140, 130, 120, 110, 100, and 90 F / g at 5, 10, 20, 50, 100, and 200 mV / s.

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Abstract

The invention discloses a carbon composite material. The carbon composite material comprises 0.1-35wt% of a carbon nanomaterial and 99.9-65wt% of amorphous carbon with a high surface area; the carbon nanometer is one or a mixture of more of carbon nanotubes, carbon fibers, graphene oxide and graphene; and the specific surface area, the pore volume and the conductivity of the composite material are not lower than 800m<2>/g, not lower than 0.3cm<3> and not lower than 4S/cm respectively, and the aperture of the composite material is 0.5-10nm. The carbon composite material has the respective characteristics of the carbon nanomaterial and the amorphous carbon, realizes the organic combination of the carbon nanomaterial and the amorphous carbon in functions, has high surface area and high conductivity, and can provide superior capacity and rate performance as an excellent electrode and conductive material of super capacitors, lithium ion capacitors, fuel batteries and lead carbon battery electrodes. The carbon composite material can remove impurities in water as an electrode material in water treatment devices.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a carbon composite material and its preparation method and application. Background technique [0002] Activated carbon materials with high specific surface area have a wide range of applications in environmental protection, pharmaceuticals, electronics, catalysis, and energy storage. Carbon materials with high specific surface area are generally composed of graphitized microcrystals and non-graphitized amorphous carbonaceous. Amorphous carbonaceous and graphitized crystallites are interconnected to form the void structure of activated carbon. The current preparation of activated carbon materials mainly obtains a high specific surface area by carbonizing the carbon-containing precursor and reacting with an activating reagent. The formed porous structure will lead to defects in the structure of amorphous carbon, resulting in the decline of electrical conductivity and mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J20/20B82Y30/00
CPCY02E60/13
Inventor 傅强刘杰王安苗
Owner JIANGSU JF ADVANCED TECH
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