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Silver selenide thermoelectric composite film and preparation method and application thereof

A technology of composite thin film and silver selenide, which is applied in the manufacture/processing of thermoelectric devices, materials for lead-out wires of thermoelectric devices, coatings, etc., can solve the problems of low output power and large internal resistance of films

Pending Publication Date: 2022-03-25
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ag 2 Se has good electrical conductivity and high Seebeck coefficient, and can be used to make generators at room temperature. The current common method is to directly prepare paper-based thermoelectric films from the dispersion of silver selenide particles by suction filtration, but this method prepares The internal resistance of the film is relatively large, and the output power is very small

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  • Silver selenide thermoelectric composite film and preparation method and application thereof
  • Silver selenide thermoelectric composite film and preparation method and application thereof

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preparation example Construction

[0023] The invention provides a method for preparing a silver selenide thermoelectric composite film, comprising the following steps:

[0024] (1) Silver selenide, solvent, binding agent and PEDOT:PSS aqueous solution are mixed and pulverized to obtain a dispersion;

[0025] (2) Deposit the dispersion obtained in the step (1) on the substrate, and then dry to obtain a silver selenide thermoelectric composite thin film.

[0026] Unless otherwise specified, the present invention has no special limitation on the source of each component, and commercially available products or products prepared by conventional preparation methods well known to those skilled in the art can be used.

[0027] The invention mixes the silver selenide, solvent, binder and PEDOT:PSS aqueous solution and then pulverizes to obtain the dispersion liquid.

[0028] In the present invention, the particle size of the silver selenide is preferably 1-50 μm, more preferably 5-40 μm, and most preferably 10-30 μm. ...

Embodiment 1

[0057] (1) Put 200 mg of silver selenide particles (10-100 μm) in a grinding bowl, add 2 mL of N-methylpyrrolidone, grind with a grinding rod until the solvent evaporates completely, then add 2 mL of N-methylpyrrolidone, repeat 4 times, A total of 20min, to obtain silver selenide powder (1 ~ 50μm);

[0058] (2) the silver selenide powder that step (1) obtains, 30mg sodium carboxymethyl cellulose, 0.5mL PEDOT:PSS aqueous solution (the total concentration of PEDOT and PSS is 15g / L, PEDOT:PSS is purchased from Aladdin platform, CAS No. 155090-83-8) and 25 mL of absolute ethanol (the mass ratio of silver selenide and sodium carboxymethylcellulose is 6.7:1, the mass ratio of silver selenide and PEDOT:PSS aqueous solution is 1 mg: 0.0025 mL , the quality of silver selenide and the volume ratio of absolute ethanol is 1mg:0.125mL) mixed, stirred with a glass rod for 10min, put into an ultrasonic cell pulverizer for pulverization, the power is 110W, the time is 30min, and the ultrasoni...

Embodiment 2

[0061] The quality of sodium carboxymethyl cellulose in step (2) of embodiment 1 is replaced as 40mg, and now the mass ratio of silver selenide and sodium carboxymethyl cellulose is 5:1, and other parameters are all identical with embodiment 1.

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Abstract

The invention provides a silver selenide thermoelectric composite film and a preparation method and application thereof, and belongs to the technical field of thermoelectric films, and the preparation method comprises the following steps: mixing silver selenide, a solvent, a binder and a PEDOT: PSS aqueous solution, crushing, depositing on a substrate, and drying to obtain the silver selenide thermoelectric composite film. Silver selenide is adopted for preparing the composite film, in the smashing process, the particle size of the silver selenide is reduced, particles are in tight contact after deposition, the binding tightness between the particles can be further improved by adding the binder, the high Seebeck coefficient value is achieved, the internal resistance of the film is reduced, meanwhile, the binding property of the silver selenide and a substrate is improved, and by adding the PEDOT: PSS aqueous solution, the composite film is prepared. By utilizing the high conductivity characteristic, the internal resistance of the film is further reduced, and the thermoelectric performance of the film is improved. The result of the embodiment shows that the thermoelectric device prepared by the composite film prepared by the invention can generate 7.4 mv voltage by utilizing the temperature difference between the human skin and the environment.

Description

technical field [0001] The invention relates to the technical field of thermoelectric thin films, in particular to a silver selenide thermoelectric composite thin film and its preparation method and application. Background technique [0002] Heat energy is closely related to life. As the main forms of unused energy in social life, waste heat from automobile exhaust, waste heat from industrial equipment, and heat released by human metabolism have triggered human thinking about energy recovery. Thermoelectric technology is a promising solution. Provides the possibility for waste heat recovery. [0003] Thermoelectric devices based on the thermoelectric effect have the ability to generate electricity by temperature difference. With the help of special semiconductor materials, thermal energy can be directly converted into electrical energy, and energy recycling can be realized without pollution and noise. Due to the Seebeck effect of thermoelectric semiconductors, when there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D5/12H01L35/16H01L35/34H10N10/01H10N10/852
CPCB05D7/24B05D5/12H10N10/852H10N10/01
Inventor 吴幸董作院骆晨王舒涵周洮宇
Owner EAST CHINA NORMAL UNIV
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