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Composite graphene fiber film as well as preparation method and application thereof in production of electric vehicle supercapacitor

A technology of composite graphene and graphene fibers, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, applications, etc., can solve problems such as affecting applications, large internal resistance, and poor electrical conductivity.

Inactive Publication Date: 2018-05-25
北京雷恩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of large internal resistance, a large number of unusable micropores, and low utilization rate of specific surface area when activated carbon is used as an electrode material. It is an ideal electrode material.
Carbon nanotubes are ideal electrode materials because of their unique hollow structure, which is conducive to the infiltration of electrolyte, but due to the imperfect preparation process and high price, their application is affected.
However, graphene discovered in the past two years, as a single-layer graphite, has many unique properties, but it is still limited in specific capacity as an electrode material alone, making it difficult to apply
[0006] Although transition metal oxides and conductive polymer materials have solved the problems of small specific capacity and low energy density as electrode materials, their electrical conductivity is often not very good, which also limits their commercial application. Therefore, high-performance composite materials have become the focus of recent years. In view of the research hotspots of electrode materials, the present invention has developed a new type of graphene composite supercapacitor electrode film, which has relatively high specific capacity and energy density, and can significantly improve the overall performance of supercapacitor batteries

Method used

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  • Composite graphene fiber film as well as preparation method and application thereof in production of electric vehicle supercapacitor
  • Composite graphene fiber film as well as preparation method and application thereof in production of electric vehicle supercapacitor
  • Composite graphene fiber film as well as preparation method and application thereof in production of electric vehicle supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Example 1 Preparation of semi-charred lignin

[0104] 1. Crushing of wood raw materials

[0105] Get dry woody raw material poplar branch and pulverize into woody raw material powder (poplar branch powder), the particle diameter of poplar branch powder≤1cm;

[0106] In the specific embodiment of the present invention, woody raw materials are described with poplar branches as raw materials, and other woody raw materials are applicable to the present invention, for example, crop straw, waste paper, wooden furniture, wood, etc.

[0107] 2. The first acid hydrolysis treatment

[0108] Poplar branch powder (10kg) is placed in the first reaction tank that is equipped with the phosphoric acid solution of 5% in mass percent concentration, and poplar branch powder is mixed with catalyst phosphoric acid solution, wherein the weight ratio of poplar branch powder and catalyzer is 2-7: 100 (preferably 4: 100); then close the reaction tank, and heat up (in the embodiment of the pre...

Embodiment 2

[0116] 1. Preparation of graphite

[0117] 1A. Accurately weigh semi-coke lignin (0.5kg) and place it in a high-temperature carbonization furnace, heat up until the temperature reaches and maintains 900°C, and carry out carbonization treatment under the condition that the temperature is maintained at 900°C to obtain carbon powder (0.301 kg), wherein the heating rate of carbonization treatment is 10°C / min, and the carbonization treatment time is 45min;

[0118] 1B. Place the prepared carbon powder in a graphitization furnace, heat up to a temperature of 2100°C and keep it at 2100°C, and then pass nitrogen gas into it for protection, and carry out graphitization treatment to obtain a synthetic Graphite (0.251kg), wherein the heating rate of graphitization treatment is 10°C / min, and the time of graphitization treatment is 12min.

[0119] 2. Preparation of graphene oxide

[0120] 2A. Add the accurately weighed synthetic graphite (0.251kg) prepared in step 1) into the asphalt bin...

Embodiment 3

[0150] 1. Preparation of graphite

[0151] 1A. Accurately weigh semi-coke lignin (0.5kg) and place it in a high-temperature carbonization furnace, heat up until the temperature reaches and maintains 1000°C, and carry out carbonization treatment under the condition that the temperature is maintained at 1000°C to obtain carbon powder ( 0.3kg), wherein the heating rate of carbonization treatment is 15°C / min, and the carbonization treatment time is 35min;

[0152] 1B. Place the prepared carbon powder in a graphitization furnace, heat up to a temperature of 2400°C and maintain it at 2400°C, and then pass in argon gas for protection and carry out graphitization treatment under the condition that the temperature is maintained at 2400°C. Synthetic graphite (0.248kg), wherein the heating rate of the graphitization treatment is 15°C / min, and the graphitization treatment time is 10min.

[0153] 2. Preparation of graphene oxide

[0154] 2A. Add the synthetic graphite (0.248kg) prepared ...

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Abstract

The invention belongs to the field of electric vehicle energy source production and relates to a composite graphene fiber film material as well as a preparation method and an application thereof in production of a supercapacitor. Graphene fiber woven fabric is woven on a loom with graphene fiber as a raw material, and then, forming glue is uniformly applied to two sides of the graphene fiber wovenfabric; rolling treatment is performed on a dual-roller open mill; the rolled graphene fiber fabric is sealed tightly with a PTFE (polytetrafluoroethylene) film and placed in a cool place to be aired, the composite graphene fiber film is prepared, and a supercapacitor electrode film is prepared from the composite graphene fiber film. The prepared composite graphene fiber film has high tensile property, high bending property and good heat stability, and the supercapacitor produced with the composite graphene fiber film has balanced load and long service life, can quickly and efficiently absorbregenerated kinetic energy produced by electric vehicle braking and is a high-end assisting energy source.

Description

technical field [0001] The invention belongs to the field of electric vehicle energy source manufacturing, and relates to a production method of a graphene composite supercapacitor electrode film. Background technique [0002] At present, electric vehicle batteries mainly include storage batteries and fuel cells. Among them, batteries have many defects such as long charging time, short mileage, short life, serious pollution, and insufficient power. Although commercial operations have been realized, they can only be used as a stage Transitional products; and fuel cells have problems such as high cost and hydrogen storage technology that cannot be solved, and are currently not commercialized. The above defects prompt people to seek a green energy storage device with high efficiency, long life, more energy storage, convenient use, and no pollution. [0003] Supercapacitor batteries store energy through polarized electrolytes. There is no chemical reaction in the energy storage...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B37/10B32B9/00B32B9/04B32B27/32B32B7/12D03D15/00D03D13/00H01G11/40H01G11/86D06M15/53D01F9/17D06M101/40D03D15/275
CPCH01G11/40H01G11/86D01F9/17D03D13/008D03D15/00D06M15/53B32B5/02B32B7/12B32B27/12B32B27/322B32B37/10B32B37/1284D06M2101/40B32B2307/308B32B2307/54B32B2307/546B32B2307/202B32B2262/106B32B2605/08B32B2457/16Y02E60/13
Inventor 孙家伟王静颉二旺
Owner 北京雷恩新材料科技有限公司
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