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A kind of activated carbon electrode and preparation method thereof

A technology of activated carbon and electrodes, which is applied in the field of electrochemistry, can solve the problems of insignificant increase in conductivity, poor electronic conductivity, and large internal resistance of electrodes, and achieve the effects of reducing electronic resistance, improving conductivity, and reducing electrode resistance

Active Publication Date: 2019-11-12
天津普兰能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when activated carbon is used as an active material to prepare electrodes, powdered activated carbon is often used, and the conductivity of powdered activated carbon itself is extremely poor, even lower than 0.1S / cm, and the electrode prepared by using activated carbon as an active material has a large internal resistance. The problem
[0005] Nowadays, electrodes are mostly prepared by coating and molding. For example, Chinese patent CN200610109423.2 discloses a coating and molding electrode, which solves the problem of poor electronic conductivity between activated carbon particles by coating, but compared with powdered activated carbon. The increase in conductivity of the electrode is not obvious

Method used

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  • A kind of activated carbon electrode and preparation method thereof
  • A kind of activated carbon electrode and preparation method thereof
  • A kind of activated carbon electrode and preparation method thereof

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preparation example Construction

[0038] In the present invention, when the surface of the current collector includes thorn-like protrusions, the method for preparing the current collector preferably includes: stamping the base material with a die to obtain the current collector including thorn-like protrusions. In the present invention, the die is preferably inlaid with a steel needle, and the steel needle is preferably cylindrical; the end surface of the steel needle includes a protrusion, and the protrusion is preferably a triangular protrusion, a quadrangular protrusion, or a star-shaped protrusion. raised or rounded. In the present invention, the diameter of the cylindrical steel needle is preferably 0.2-0.6 mm, and the height of the protrusion on the end surface of the steel needle is preferably 100-200 μm. In the present invention, there is no special requirement for the stamping process, and the stamping process well known to those skilled in the art can be used.

[0039] In the present invention, bes...

Embodiment 1

[0152] Preparation of activated carbon:

[0153] ①Mix epoxy resin, tantalum ethoxide, p-toluenesulfonic acid and acetone at a weight ratio of 100:10:10:200 at 20°C and fully stir to dissolve to obtain a mixed solution; ②Heat the above solution to 70°C, and then Add water dropwise to the mixed solution and keep stirring until the organic metal salt is completely hydrolyzed to obtain a hydrolyzed complex. The time is about 2 hours, and the amount of water added is about 200mL; The curing time is about 10 hours to obtain the solidified material, and the particle size of the solidified material after pulverization is controlled at D50 of 50 μm; ④ After the solidified material is pulverized, it is heated and oxidized in a fluidized bed at 260 °C for 3 hours to obtain a composite oxidation product; ⑤The The composite oxidation product was pressed into a thin sheet with a thickness of 2 mm and a diameter of 5 mm under a pressure of 1 MPa; ⑥ Put the preform into a carbonization reacti...

Embodiment 2

[0157] Preparation of long-array carbon nanotubes, using 500 μm alumina pellets as inert particles to dry-load co-precipitation Fe / Mg / Al sheet catalyst fixed bed to prepare long-array carbon nanotubes:

[0158] ① Put 2g Fe(NO 3 )3.9H 2 O, 3.2g Mg(NO 3 ) 2.6 H2O and 2.35g Al(NO 3 ) 3.9 h 2 Dissolve O in 125ml of deionized water, add 22.5g of urea, reflux at 100°C for 12h for co-precipitation reaction, then stand at 95°C for 12h, cool, filter, wash with deionized water, and freeze-dry to obtain Fe / Mg / Al Layered double hydroxyl metal hydroxide sheet catalyst, wherein Fe is the active component. ②Put 500μm alumina pellets in a porcelain boat, then place the porcelain boat in a horizontal fixed-bed reactor, and raise the temperature of the reactor from room temperature to the pretreatment temperature of 800°C at a rate of 10°C / min under the protection of argon. °C, keep the temperature for 0.5h and then drop to room temperature under the protection of argon. The alumina pel...

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Abstract

The invention provides an active carbon electrode and a preparation method therefor. The active carbon electrode provided by the invention comprises a current collector and an active material layer for coating the surface of the current collector, wherein the active material layer comprises carbide-doped active carbon, a conductive agent and a binder; the conductive agent comprises long carbon fibers and / or long array carbon nanotubes; and the lengths of the long carbon fibers and the long array carbon nanotubes are both not less than 100 [mu]m independently. By virtue of lowering of contact resistance between the active materials, improvement of conductivity of the active materials, and improvement of conductivity between the active materials and the current collector, multi-stage electric conduction intensifying is realized, and the electrode resistance is further lowered; and the active carbon electrode and the preparation method therefor provided by the invention have the advantages of simple process and stable quality, and are particularly suitable for the active carbon electrode preparation and application in the aspects of a supercapacitor, capacitor type sea water desalination and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an activated carbon electrode and a preparation method thereof. Background technique [0002] Supercapacitors have the advantages of large capacitance, fast charging and discharging with large currents, and long cycle life. They have been widely used in many fields that require high specific power, high cycle efficiency, and long-life power supplies. [0003] Activated carbon has become the most widely used supercapacitor electrode active material due to its advantages of low preparation cost, high specific capacity and mature preparation process. The preparation method of activated carbon disclosed in the prior art is mainly a chemical activation method. The activators commonly used in the chemical activation method include hydroxides of alkali metals and alkaline earth metals, inorganic salts and some acids, among which the super activated carbon made with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/38H01G11/40H01G11/70H01G11/86
CPCH01G11/24H01G11/30H01G11/38H01G11/40H01G11/70H01G11/86Y02E60/13
Inventor 程杰
Owner 天津普兰能源科技有限公司
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