Preparation method and application of compound electrode slice

A composite electrode and solution technology, applied in battery electrodes, capacitor electrodes, circuits, etc., can solve the problems of lamination and easy agglomeration, and achieve the effect of simple process, omitting the coating process, and avoiding agglomeration and lamination.

Active Publication Date: 2015-06-03
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method for preparing a composite electrode sheet, which solves the technical problem of easy agglomeration and stacking of graphene used in the electrode sheet in the prior art, and the composite electrode sheet prepared by this method application

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  • Preparation method and application of compound electrode slice
  • Preparation method and application of compound electrode slice

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preparation example Construction

[0014] see figure 1 , figure 1 Show the flow chart of the preparation method of the composite electrode sheet according to the embodiment of the present invention, including the following steps:

[0015] Step S01, preparing the first solution

[0016] adding graphene oxide and carbon nanotubes with a weight ratio of 1 to 2:1 into an alcohol solvent, ultrasonically treating, and stirring to obtain a first solution;

[0017] Step S02, preparing a composite electrode sheet precursor

[0018] Adding a metal salt solution to the first solution, ultrasonically treating it to obtain a second solution, using the second solution as an electrolyte, and using a metal foil as an electrode, performing electrophoresis treatment to obtain a composite electrode sheet precursor;

[0019] Step S03, preparing a composite electrode sheet

[0020] The electrode sheet precursor is dried, put into a reducing solution, and reacted for 1 hour to 36 hours at a temperature of 80°C to 100°C, and the ...

Embodiment 1

[0036] The preparation method of the composite electrode sheet according to the embodiment of the present invention comprises the following steps:

[0037] Graphite oxide was prepared by the modified Hummers method:

[0038]Add 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stir evenly, cool for more than 6h, wash until neutral, and dry. Add the dried sample to 460mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2 hours, then slowly add 920mL of deionized water . After 15 minutes, add 2.8L of deionized water (which contains 50mL of 30% hydrogen peroxide), after which the color of the mixture turns bright yellow. Suction filtration while hot, and then wash with 5L of 10% hydrochloric acid, suction filtration, Graphite oxide was obtained by vacuum drying at 50°C for 48 hours...

Embodiment 2

[0049] The preparation method of the composite electrode sheet according to the embodiment of the present invention comprises the following steps:

[0050] Graphite oxide was prepared by the modified Hummers method:

[0051] Add 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stir evenly, cool for more than 6h, wash until neutral, and dry. Add the dried sample to 460mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2 hours, then slowly add 920mL of deionized water . After 15 minutes, add 2.8L of deionized water (which contains 50mL of 30% hydrogen peroxide), after which the color of the mixture turns bright yellow. Suction filtration while hot, and then wash with 5L of 10% hydrochloric acid, suction filtration, Graphite oxide was obtained by vacuum drying at 50°C for 48 hour...

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Abstract

The invention is suitable for the field of electrode preparation, and provides a preparation method and application of a compound electrode slice. The preparation method of the compound electrode slice comprises the following steps of: preparing a first solution, preparing a compound electrode slice precursor, and preparing the compound electrode slice. According to the preparation method of the compound electrode slice, graphene oxide and a carbon nano tube are dissolved in alcohol, and are ultrasonically stirred, so that the specific surface area after graphene is dried is increased; and through an electro-deposition method, the process is simple and the time is short, and the equivalent series resistance (ESR) of the compound electrode slice can be reduced. The preparation method of the compound electrode slice is low in cost and high in production profit, and is very suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of electrode preparation, and in particular relates to a method for preparing a composite electrode sheet and its application. Background technique [0002] Andre K. Geim (Andre K.Geim) of the University of Manchester in the United Kingdom prepared graphene materials in 2004, and it has received widespread attention due to its unique structure and photoelectric properties. Single-layer graphene is considered an ideal material due to its large specific surface area, excellent electrical and thermal conductivity, and low thermal expansion coefficient, and can be used as an electrode material in supercapacitors and lithium-ion batteries. [0003] However, due to the two-dimensional structure of the monolayer of graphene, it is easy to agglomerate and stack, curl or highly wrinkle during the process of drying and losing interlayer water, which eventually leads to a great reduction in the utilization of its specific surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1393H01M4/133H01G9/04
CPCY02E60/10
Inventor 周明杰吴凤王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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