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Method for preparing ultra-flexible high-performance sulfur-doped silver selenide/nylon composite thermoelectric thin film

A thermoelectric thin film, high-performance technology, applied in the manufacture/processing of thermoelectric devices, thermoelectric device junction lead-out materials, etc., can solve the problems of poor cost and toxicity, poor flexibility, high thermal conductivity, etc., to reduce cost and toxicity , flexibility and tensile properties, and the effect of low reaction temperature

Pending Publication Date: 2022-04-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent has poor flexibility and relatively high thermal conductivity, and at the same time, it is also poor in terms of cost and toxicity

Method used

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  • Method for preparing ultra-flexible high-performance sulfur-doped silver selenide/nylon composite thermoelectric thin film
  • Method for preparing ultra-flexible high-performance sulfur-doped silver selenide/nylon composite thermoelectric thin film
  • Method for preparing ultra-flexible high-performance sulfur-doped silver selenide/nylon composite thermoelectric thin film

Examples

Experimental program
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Effect test

Embodiment 1

[0038]A method for preparing ultra-flexible high-performance sulfur-doped silver selenide / nylon flexible composite thermoelectric film, the method is 20ml ethylene glycol dispersion (25.7mmol / L) of selenium nanowires, 0.18g silver sulfide (adding amount meets The molar ratio of selenium nanowires to silver sulfide is 0.7), 20ml ethylene glycol is added in the beaker, after stirring at 90°C for 15h, centrifuge at a speed of 3000r / min, extract the black precipitate obtained, and use absolute ethanol at 3000r / min Centrifuge at high speed for 1min to remove impurities. After centrifugation, disperse the carefully cleaned black target product in 45ml of absolute ethanol for 15min and ultrasonically disperse for 15min. Then use nylon filter membrane as the substrate and vacuum filter to obtain the silver-selenium-sulfur ternary alloy Nylon flexible film, the obtained film was placed in a vacuum drying oven and dried at a temperature of 60° C. for 12 hours. After the film is taken ou...

Embodiment 2

[0049] Compared with Example 1, most of them are the same, except that the added amount of sulfur is adjusted so that the molar ratio of selenium nanowires to silver sulfide is 0.5.

Embodiment 3

[0051] Compared with Example 1, most of them are the same, except that the added amount of silver sulfide is adjusted so that the molar ratio of selenium nanowires to silver sulfide is 0.8:1.

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Abstract

The invention relates to a method for preparing an ultra-flexible high-performance sulfur-doped silver selenide / nylon composite thermoelectric film, which comprises the following steps: (1) taking selenium nanowires to react with silver sulfide powder under the condition of taking ethylene glycol as a solvent to obtain silver-selenium-sulfur ternary alloy powder; and (2) ultrasonically dispersing the silver-selenium-sulfur ternary alloy powder in absolute ethyl alcohol, taking a nylon filter membrane as a substrate, performing vacuum filtration, drying, and performing hot pressing treatment to obtain a target product. Compared with the prior art, the composite film has excellent flexibility and excellent thermoelectric performance, and the film is used for manufacturing a high-output-performance thermoelectric device and is expected to serve as a new power supply source of a wearable electronic device.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric material preparation, and relates to a method for preparing ultra-flexible high-performance sulfur-doped silver selenide / nylon composite thermoelectric film. Background technique [0002] Thermoelectric materials are a class of functional materials that directly realize the mutual conversion between thermal energy and electrical energy through the carrier transport inside the material. Thermoelectric generators and refrigeration devices made of thermoelectric materials have the advantages of simple structure, no moving parts, no wear, no noise, no pollution, and small volume. As an environmentally friendly material, thermoelectric materials have broad application prospects in the field of energy supply. [0003] The general performance index of thermoelectric materials is the dimensionless thermoelectric figure of merit ZT, and its expression is as follows: [0004] ZT = α 2 σT / κ where: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H01L35/16H01L35/24H10N10/01H10N10/852H10N10/856
CPCH10N10/856H10N10/852H10N10/01
Inventor 蔡克峰伍苗苗
Owner TONGJI UNIV
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