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Graphene-based composite electrode material and preparation method thereof

A composite electrode, graphene-based technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing and other directions, can solve the problem of no ion transport channel, low mass specific capacity, two-dimensional layered material electrode thickness can not be thick, etc. problem, to achieve a good electron transport network and ion transport channels, the effect of increased thickness

Inactive Publication Date: 2015-12-16
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

For example Ti 3 C 2 and MoS 2 The volume specific capacity of the sheet can reach 900F / cm 3 and 700F / cm 3 , which is mainly due to their relatively high density, but their mass specific capacities are relatively low, 245F / g and 280F / g, respectively, and if the electrodes of these metal oxide-based composite materials are made thick, their ions and / or Or electrons will not be able to be effectively transported; and two-dimensional layered thin film electrode materials cannot be thickened because of the lack of effective ion transport channels.

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  • Graphene-based composite electrode material and preparation method thereof
  • Graphene-based composite electrode material and preparation method thereof
  • Graphene-based composite electrode material and preparation method thereof

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preparation example Construction

[0022] The preparation method of graphene composite electrode material of the present invention, it comprises the steps:

[0023] (1) Preparation of graphene matrix.

[0024] The graphite derivative was added into deionized water, and ultrasonically dispersed in an ice-water bath to obtain a graphene derivative solution.

[0025] Preferably, the graphene derivative is selected from graphene oxide.

[0026] The ultrasonically dispersed graphene derivative solution is placed in a hydrothermal kettle for hydrothermal treatment to obtain a graphene matrix with a three-dimensional porous structure.

[0027] Those skilled in the art can understand that hydrothermal treatment is conducive to the self-assembly of the sheet structure of graphene derivatives to form a three-dimensional porous network structure, and the graphene matrix thus obtained has a higher specific surface area and a large amount of oxygen. Functional groups, so it is beneficial for the polymer component to adsor...

Embodiment 1

[0059] (1) Preparation of three-dimensional porous graphene matrix.

[0060] Weighed 170 mg of graphite oxide and added it to 85 mL of deionized water, and ultrasonically dispersed in an ice-water bath to obtain a 2 mg / mL graphene oxide solution. The uniformly dispersed graphene oxide aqueous solution prepared above was placed in a 100 mL hydrothermal reaction kettle, and then the hydrothermal reaction kettle was placed in a muffle furnace at a temperature of 180° C. for 6 hours to obtain a three-dimensional porous graphene matrix.

[0061] (2) Preparation of graphene / polyaniline composites.

[0062] The graphene substrate prepared by the above reaction was soaked in 20 mL of 1 mol / L hydrochloric acid solution in which aniline monomer was dissolved for 12 hours, and the concentration of the aniline monomer was 0.16 mol / L. Then soak the graphene matrix adsorbed with aniline monomer in a hydrochloric acid solution dissolved with ammonium persulfate and react for 2 hours to obta...

Embodiment 2

[0067] (1) Preparation of three-dimensional porous graphene matrix.

[0068] Weighed 170 mg of graphite oxide and added it to 85 mL of deionized water, and ultrasonically dispersed in an ice-water bath to obtain a 2 mg / mL graphene oxide solution. The homogeneously dispersed graphene oxide aqueous solution prepared above was placed in a 100 mL hydrothermal reaction kettle, and then the hydrothermal reaction kettle was placed in a muffle furnace at a temperature of 180° C. for 6 hours to obtain a three-dimensional graphene matrix.

[0069] (2) Preparation of graphene / polyaniline composites.

[0070] The graphene substrate prepared by the above reaction was soaked in 1mol / L hydrochloric acid solution dissolved with aniline monomer for 12h, and the concentration of the aniline monomer was 0.013mol / L. Then soak the graphene matrix adsorbed with aniline monomer in a hydrochloric acid solution dissolved with ammonium persulfate and react for 2 hours to obtain a graphene / polyaniline ...

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Abstract

The invention provides a graphene-based composite electrode material. The composite electrode material comprises a graphene base body and a polymer component. The graphene base body has a three-dimensional porous structure formed by self assembling of a laminated structure of a graphene derivative in an overlap joint, wherein the porosity is 10% to 95%. The porous structure of the graphene base body is filled with the polymer component and in-situ polymerization of the polymer component and the graphene base body is realized. In addition, the invention also provides a manufacturing method of the graphene-based composite electrode material.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode materials and preparation thereof, in particular to a graphene-based composite electrode material with high volume specific capacity and a preparation method thereof. Background technique [0002] Graphene has become an ideal capacitor material due to its large specific surface area, high electronic conductivity, and good mechanical properties. Surface area and ionic conductivity decrease. At present, graphene-based electrodes are mainly prepared by modifying graphene or forming graphene composite electrode materials with conductive polymer materials to improve capacitance. [0003] However, due to the relatively low density of graphene and conductive polymer materials, the density of the composite material formed by the two is also relatively low, resulting in relatively low mass specific capacity and volume specific capacity of the composite material. In addition, some metal o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/38H01G11/48H01G11/86
Inventor 杨全红徐月罗加严陶莹郑晓雨游从辉吕伟
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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