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Preparation method of multi-walled carbon nanotube loaded high-density high-dispersion nano platinum counter electrode

A multi-wall carbon nanotube, high dispersibility technology, applied in circuits, capacitors, electrical components, etc., can solve the problem of difficult to achieve large-scale production, inability to effectively control platinum loading, dispersibility and particle size, affecting the composite effect. Electrode electrocatalytic activity and other issues, to achieve the effect of reducing dosage and low cost

Active Publication Date: 2015-04-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of method cannot effectively control the loading, dispersion, and particle size of platinum on the surface of carbon nanotubes, and this type of method itself is difficult to achieve large-scale production, which affects the electrocatalytic activity of the composite counter electrode in DSSC. , so that the photoelectric conversion efficiency of DSSC cannot be effectively improved

Method used

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  • Preparation method of multi-walled carbon nanotube loaded high-density high-dispersion nano platinum counter electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 0.15g of multi-walled carbon nanotubes and add them to 100mL of mixed acid of sulfuric acid and nitric acid (the volume ratio of sulfuric acid and nitric acid is 3:1), after ultrasonic treatment for 4h, centrifuge, wash with water several times until neutral, and vacuum dry at 80°C for 10h , grinding, spare;

[0022] Take 0.05g of mixed acid-treated multi-wall carbon nanotubes and 10mL of 0.01mol / L chloroplatinic acid solution, add it to 40ml of ethylene glycol, stir it evenly with ultrasonic waves, transfer it to a hydrothermal reaction kettle, and react at 120°C for 6h; After the completion, the obtained solution was centrifuged, washed several times with water to neutrality, dried in vacuum at 80°C for 10 hours, and ground to obtain the nano-platinum composite material supported by multi-walled carbon nanotubes, which was ready for use;

[0023] Take 0.05g of the composite material prepared above, mix it with 0.01g of ethyl cellulose, 2ml of terpineol and 0.01ml...

Embodiment 2

[0026] Take 0.15g of multi-walled carbon nanotubes and add them to 100mL of mixed acid of sulfuric acid and nitric acid (the volume ratio of sulfuric acid and nitric acid is 3:1), after ultrasonic treatment for 4h, centrifuge, wash with water several times until neutral, and vacuum dry at 80°C for 10h , grinding, spare;

[0027] Take 0.05g of mixed acid-treated multi-walled carbon nanotubes, 20mL of 0.01mol / L chloroplatinic acid solution and add it to 40ml of ethylene glycol, stir it evenly with ultrasonic waves, transfer it to a hydrothermal reaction kettle, and react at 120°C for 6h; After the reaction, the obtained solution was centrifuged, washed with water several times to neutrality, dried in vacuum at 80°C for 10 hours, and ground to obtain the nano-platinum composite material supported by multi-walled carbon nanotubes, which was ready for use;

[0028] Take 0.05g of the composite material prepared above, mix it with 0.01g of ethyl cellulose, 2ml of terpineol and 0.01ml...

Embodiment 3

[0031] Take 0.15g of multi-walled carbon nanotubes and add them to 100mL of mixed acid of sulfuric acid and nitric acid (the volume ratio of sulfuric acid and nitric acid is 3:1), after ultrasonic treatment for 4h, centrifuge, wash with water several times until neutral, and vacuum dry at 80°C for 10h , grinding, spare;

[0032] Take 0.05g of multi-walled carbon nanotubes treated with mixed acid, 20mL of 0.01mol / L chloroplatinic acid solution and 0.0015g of polyvinylpyrrolidone and add them to 40ml of ethylene glycol. React at ℃ for 6 hours; after the reaction is completed, the obtained solution is centrifuged, washed several times to neutrality, vacuum-dried at 80℃ for 10 hours, and ground to obtain the nano-platinum composite material supported by multi-walled carbon nanotubes, which is ready for use;

[0033] Take 0.05g of the composite material prepared above, mix it with 0.01g of ethyl cellulose, 2ml of terpineol and 0.01ml of triton, stir it ultrasonically to obtain a un...

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Abstract

The invention discloses a preparation method of a multi-walled carbon nanotube loaded high-density high-dispersion nano platinum counter electrode. The method comprises the main steps of: preprocessing a multi-walled carbon nanotube through mixed acid, dispersing into chloroplatinic acid-ethylene glycol solution with a certain concentration, and adding appropriate polyvinylpyrrolidone; carrying out ultrasonic agitation and hydro-thermal treatment to obtain a complex of a multi-walled carbon nanotube loaded platinum; after being subjected to multiple washing, centrifugal separation and drying, uniformly mixing the complex with a certain amount of terpineol, ethyl cellulose, triton and the like to obtain complex slurry; and coating the slurry onto a conductive glass substrate through a coating method, and obtaining the counter electrode through sintering at high temperature. The counter electrode material prepared by the method has the advantages that the specific surface area is large, the catalytic activity is high, the operation is simple, the preparation cost is low, and the like.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a method for preparing a counter electrode of a dye-sensitized solar cell based on multi-walled carbon nanotubes loaded with nano-platinum. Background technique [0002] Dye-sensitized solar cell (DSSC) is a third-generation thin-film solar cell developed on the basis of nano-photoelectric functional materials such as nanocrystalline semiconductors, organic photosensitive dyes, electrolytes, and highly catalytically active counter electrodes. Among them, the counter electrode is one of the important components of DSSC, and its main functions are: (1) collecting and transporting electrons, (2) catalytically reducing the oxidized electrolyte. The traditional counter electrode is mainly a platinum-coated conductive glass electrode, in which platinum has excellent conductivity and efficient catalytic activity. However, platinum is a noble metal, and the cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
Inventor 王育乔顾云良姚丹王盼盼孙岳明
Owner SOUTHEAST UNIV