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Graphene sheet film linked with carbon nanotubes, method for producing same and graphene sheet capacitor using same

A graphene sheet, carbon nanotube technology, applied in nanostructure manufacturing, graphene, capacitors and other directions, can solve the problems of capacitor performance deterioration, performance deterioration, failure to make full use of large specific surface area, etc., to achieve capacitor performance improvement, The effect of improving conductivity and performance

Active Publication Date: 2013-08-07
NAT INST FOR MATERIALS SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] As mentioned above, graphene, which is the latest nanomaterial, is the most anticipated material, but a single sheet of graphene is insufficient for the adsorption of electrolyte ions, and the large specific surface area cannot be fully utilized.
[0022] In addition, the electrical connection effect of the spacer of carbon nanotubes is insufficient only by compounding with carbon nanotubes. In addition, the uniform dispersion of carbon nanotubes and graphene uses surfactants and cations that degrade the performance of capacitors. and anion, so the performance deteriorates, and the expected characteristics cannot be found

Method used

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  • Graphene sheet film linked with carbon nanotubes, method for producing same and graphene sheet capacitor using same
  • Graphene sheet film linked with carbon nanotubes, method for producing same and graphene sheet capacitor using same
  • Graphene sheet film linked with carbon nanotubes, method for producing same and graphene sheet capacitor using same

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Embodiment 1

[0129] (Example 1, Comparative Examples 1 and 2)

[0130]

[0131] according to figure 2 The graphene generation procedure shown in , generates graphene.

[0132] First, graphite oxide was produced by the following modified Hummer's method using graphite particles as a raw material.

[0133] Specifically, first, 3 g of graphite and sodium nitrate (NaNO 3 ) 1.5g was added to the flask and mixed, then sulfuric acid (H 2 SO 4 , 95%) 100ml, stirred in an ice bath.

[0134] Then, slowly add potassium permanganate (KMnO 4 ) 8g, kept stirring at room temperature for 2 hours. At this point, the suspension gradually turned bright brown.

[0135] Next, 90 ml of distilled water was added to the flask with stirring. The temperature of the suspension rose to 90°C, and the suspension turned yellow.

[0136] Next, 30% hydrogen peroxide (H 2 o 2 ) 30ml, stirred at 98°C for 12 hours.

[0137] Next, in order to refine the product, first, rinse with 5% hydrochloric acid (HCl), and...

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Abstract

A graphene sheet film in which two or more graphene sheets (11-25) are stacked and the stack is film-shaped, wherein a graphene sheet stack (101) is used which comprises: first carbon nanotubes (31-48) which connect the graphene sheets (11-25) together and which form graphene sheet laminated bodies (61-65) in which the graphene sheets (11-25) are laminated such that the surfaces thereof are parallel with each other; and second carbon nanotubes (51-56) which link the graphene sheet laminated bodies (61-65) together. According to the present invention, a graphene sheet film with high capacitor properties associated with energy density and output density, a method for producing same and a graphene sheet capacitor using same can be provided.

Description

technical field [0001] The present invention relates to a film comprising a graphene sheet assembly, a manufacturing method thereof, and a graphene sheet capacitor using the same, in detail, a graphene sheet film, a manufacturing method thereof, and a graphene sheet capacitor using the graphene sheet film as an electrode, The graphene sheet film is formed by sandwiching carbon nanotubes between graphene sheets, and connecting the graphene sheets electrically and mechanically at appropriate intervals through carbon nanotubes in a three-dimensional manner. Background technique [0002] Because the charge and discharge of the electric double layer capacitor using the adsorption and desorption of electrolyte ions is rapid and the power density is high, it plays an important role as a backup power supply. However, because the energy density stored in the capacitor is low, it is considered that in the future, It is difficult to use it for high-energy-density power storage devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00C01B31/02H01G11/36H01G11/32B82B1/00
CPCC01B31/0446C01B2204/04B81C1/00158Y10S977/742C01B31/02H01G11/36Y02E60/13B82B1/002H01G11/32H01G9/048B81B2201/0221B82Y40/00Y10S977/948B82B3/0047Y10S977/842Y02T10/7022H01G9/042H01G9/058B82Y30/00C01B32/184C01B32/05Y02T10/70Y10T428/25Y10T428/30H01G11/22
Inventor 唐捷程骞新谷纪雄张晗秦禄昌
Owner NAT INST FOR MATERIALS SCI
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