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Preparation method of carbon electrode modified with surface modified graphene

A surface modification, graphene technology, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of cumbersome and lengthy preparation methods, and achieve high conductivity and good interface. Electron transport properties, effect of good electrical conductivity

Active Publication Date: 2019-03-22
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation method mentioned above is lengthy and cumbersome

Method used

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  • Preparation method of carbon electrode modified with surface modified graphene
  • Preparation method of carbon electrode modified with surface modified graphene
  • Preparation method of carbon electrode modified with surface modified graphene

Examples

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Embodiment 1

[0036] Industrialized graphene was dispersed in methanol dispersion mixed with hydrogen peroxide, then transferred to a polytetrafluoroethylene reactor, and functionalized graphene was obtained after hydrothermal heating at 80°C for 8 hours. The functionalized graphene is added by graphite, conductive carbon black, ethyl cellulose, ZrO in a ratio of 5% by weight to graphite mass percent. 2 composed methanol solution. After ball milling for 6 hours, the carbon paste for printing was obtained by rotary steaming at 50°C to the proper viscosity. Carbon electrodes were obtained by screen printing.

Embodiment 2

[0038] Industrialized graphene was dispersed in ethanol dispersion mixed with sulfuric acid, then transferred to a polytetrafluoroethylene reactor, and functionalized graphene was obtained after hydroheating at 100° C. for 10 h. The functionalized graphene is added by graphite, conductive carbon black, ethyl cellulose, ZrO in a ratio of 12% by weight to graphite mass percent. 2 composed ethanol solution. After ball milling for 10 hours, the carbon paste for printing was obtained by rotary steaming at 55° C. to an appropriate viscosity. Carbon electrodes were obtained by screen printing.

Embodiment 3

[0040] Industrialized graphene was dispersed in n-propanol dispersion mixed with sodium hydroxide, then transferred to a polytetrafluoroethylene reactor, and functionalized graphene was obtained after hydrothermal heating at 120°C for 12 hours. The functionalized graphene is added by graphite, conductive carbon black, ethyl cellulose, ZrO 2 composed n-propanol solution. After ball milling for 6 hours, the carbon paste for printing was obtained by rotary steaming at 45°C to a proper viscosity. Carbon electrodes were obtained by screen printing.

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Abstract

A preparation method of a carbon electrode modified with surface modified graphene belongs to the technical field of batteries and capacitors. The invention provides a preparation method of a carbon electrode with surface modified graphene as a conductive additive. The raw materials include functionalized graphene, graphite, conductive carbon black, pore-forming agent, binder and dispersant. The preparation method specifically includes the following steps: dispersing industrial graphene in alcohol solution mixed with dispersant and oxidant, and transferring the alcohol solution to a polytetrafluoroethylene lined reactor after ultrasonic dispersion; carrying out solvothermal reaction at 70-150 DEG C for 8-24 hours to obtain functionalized graphene; and dispersing the functionalized graphene, graphite, conductive carbon black, ethyl cellulose and ZrO2 in dispersant, carrying out ball-milling at a certain speed for a certain time, carrying out rotary evaporation to obtain carbon slurry with viscosity of 1-2 Pa.s, and obtaining a carbon electrode through screen printing and other processes. The carbon electrode modified with surface modified graphene has good conductivity and interfacial electron transmission characteristic. The carbon electrode modified with surface modified graphene can be used as cathodes in solar cells and capacitors.

Description

technical field [0001] The invention belongs to the technical field of batteries and capacitors, and relates to a method for preparing a carbon electrode with surface-modified graphene as a conductive additive, in particular to being used as a cathode in solar cells and capacitors. Background technique [0002] Carbon electrodes are used as counter electrodes in dye-sensitized solar cells, perovskite solar cells, lithium batteries, and supercapacitors due to the advantages of low price, ease of industrial production, and good electrical conductivity. However, there are some insurmountable problems in carbon electrodes that only use graphite and carbon black as the main raw materials. For example, since its charge storage power comes from the electric double layer capacitance, the resulting low specific capacity makes it difficult to greatly increase the energy density. And because of its small specific surface and low power density, it needs to be modified. Researchers usu...

Claims

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Application Information

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IPC IPC(8): H01B1/24H01B13/00
CPCH01B1/24H01B13/00
Inventor 靳映霞王振瀚钟明星穆歌朱忠其张瑾柳清菊
Owner YUNNAN UNIV
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