Method for preparing high-performance polyvinylpyrrolidone/silver selenide/nylon flexible composite thermoelectric film

A technology of polyvinylpyrrolidone and thermoelectric thin film, which is applied in the manufacture/processing of thermoelectric devices, materials for junction leads of thermoelectric devices, nanotechnology for materials and surface science, etc., can solve the problem of non-flexibility and limit the application of flexible thermoelectric materials and other issues to achieve better flexibility, improved thermoelectric performance, flexibility, and enhanced electrical conductivity

Pending Publication Date: 2020-10-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the silver selenide materials currently prepared are inflexible, which limits their application in flexible thermoelectric materials.

Method used

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  • Method for preparing high-performance polyvinylpyrrolidone/silver selenide/nylon flexible composite thermoelectric film
  • Method for preparing high-performance polyvinylpyrrolidone/silver selenide/nylon flexible composite thermoelectric film
  • Method for preparing high-performance polyvinylpyrrolidone/silver selenide/nylon flexible composite thermoelectric film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]A method for preparing high-performance silver selenide / polyvinylpyrrolidone / nylon flexible composite thermoelectric film, the method is ethylene glycol dispersion (45mmol / L) of 20ml selenium nanowires, 0.612g silver nitrate (adding amount meets silver nitrate The molar ratio to the selenium nanowires is 4:1), 0.1g of polyvinylpyrrolidone and 80ml of ethylene glycol were added to the beaker, stirred at 40°C for 2h, centrifuged at a speed of 4000r / min, and the obtained black precipitate was extracted, and alternately Add deionized water and absolute ethanol and centrifuge at a speed of 4000r / min for 3 minutes to remove impurities. After centrifugation, disperse the carefully cleaned black target product in 15ml of absolute ethanol for 15 minutes, and then use a nylon filter membrane as a lining At the bottom, the silver selenide / polyvinylpyrrolidone / nylon flexible film was obtained by vacuum filtration, and the obtained film was dried in a vacuum drying oven at a temperatu...

Embodiment 2

[0050] A method for preparing high-performance silver selenide / polyvinylpyrrolidone / nylon flexible composite thermoelectric film, the method is with the ethylene glycol dispersion (45mmol / L) of 20ml selenium nanowire, silver nitrate (addition meets silver nitrate and selenium The molar ratio of the nanowires is 2:1), 0.1g of polyvinylpyrrolidone and 80ml of ethylene glycol were added to the beaker, stirred at 40°C for 1.5h, centrifuged at a speed of 4000r / min, and the obtained black precipitate was extracted, and added alternately Centrifuge deionized water and absolute ethanol at a speed of 4000r / min for 3 minutes to remove impurities. After centrifugation, disperse the carefully cleaned black target product in 15ml of absolute ethanol and ultrasonically disperse for 15 minutes, and then use a nylon filter membrane as a substrate , vacuum filtration to obtain a polyvinylpyrrolidone / silver selenide / nylon flexible film, and place the obtained film in a vacuum drying oven to dry ...

Embodiment 3

[0052] A method for preparing silver selenide / polyvinylpyrrolidone / nylon flexible composite film with high thermoelectric performance, the method will use the ethylene glycol dispersion (45mmol / L) of 20ml selenium nanowires, silver nitrate (addition meets silver nitrate and selenium) The molar ratio of the nanowires is 3:1), 0.1g of polyvinylpyrrolidone and 80ml of ethylene glycol were added to the beaker, stirred at 40°C for 2 hours, centrifuged at a speed of 4000r / min, and the obtained black precipitate was extracted, and added alternately to Ionized water and absolute ethanol were centrifuged at a speed of 4000r / min for 3 minutes to remove impurities. After the centrifugation, the carefully cleaned black target product was dispersed in 15ml of absolute ethanol for 15 minutes, and then the nylon filter was used as a substrate. The polyvinylpyrrolidone / silver selenide / nylon flexible film was obtained by vacuum filtration, and the obtained film was dried in a vacuum drying oven...

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Abstract

The invention relates to a method for preparing a high-performance polyvinylpyrrolidone/silver selenide/nylon flexible composite thermoelectric film. The preparation method comprises the following steps: (1) taking a selenium nanowire as a template, reacting the selenium nanowire with silver nitrate in an ethylene glycol solvent, and adding polyvinylpyrrolidone in the reaction process to prepare apolyvinylpyrrolidone-coated silver selenide multi-scale nano structure; and (2) dispersing the polyvinylpyrrolidone-coated silver selenide multi-scale nanostructure in absolute ethyl alcohol, takinga nylon filter membrane as a substrate, and performing suction filtration, vacuum drying and hot pressing to obtain the target product polyvinylpyrrolidone/silver selenide/nylon composite film. Compared with the prior art, the flexible thermoelectric thin film with high performance can be prepared, and the thin film is used for manufacturing a thermoelectric device with high output performance tosupply power to a wearable electronic device.

Description

technical field [0001] The invention belongs to the technical field of flexible thermoelectric film preparation, and relates to a method for preparing high-performance polyvinylpyrrolidone / silver selenide / nylon flexible composite thermoelectric film. Background technique [0002] Thermoelectric materials are a class of functional materials that can directly convert thermal energy to electrical energy. Thermoelectric power generation and refrigeration devices prepared by thermoelectric materials have the advantages of simple structure, small size, no moving parts, no wear, no noise, no pollution, etc. As an environmentally friendly material, thermoelectric materials have broad application prospects. [0003] The performance index of thermoelectric materials is generally measured by the dimensionless figure of merit ZT, and its expression is as follows: [0004] ZT=α2σT / κ where: α is the Seebeck coefficient; σ is the electrical conductivity; κ is the thermal conductivity; T ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H01L35/24H01L35/16B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H10N10/856H10N10/852H10N10/01
Inventor 蔡克峰蒋聪童亮
Owner TONGJI UNIV
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