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Preparation method of polyvinylpyrrolidone/silver/silver telluride ternary flexible composite thermoelectric film

A technology of polyvinylpyrrolidone and thermoelectric film, which is applied in the manufacture/processing of thermoelectric devices, and the material of thermoelectric device junction leads, etc., can solve the problems of non-flexibility, low thermoelectric performance, and restrictions on the application of wearable electronic devices, and achieve The effect of excellent flexibility

Inactive Publication Date: 2019-07-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with other thermoelectric materials, currently reported silver telluride has low thermoelectric performance at room temperature, and most of them are not flexible, which limits its application in the field of wearable electronic devices.

Method used

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  • Preparation method of polyvinylpyrrolidone/silver/silver telluride ternary flexible composite thermoelectric film
  • Preparation method of polyvinylpyrrolidone/silver/silver telluride ternary flexible composite thermoelectric film
  • Preparation method of polyvinylpyrrolidone/silver/silver telluride ternary flexible composite thermoelectric film

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Embodiment 1

[0036] A preparation method of a polyvinylpyrrolidone / silver / silver telluride ternary flexible composite thermoelectric film. First, a PVP-coated tellurium nanowire is prepared. Then, the ethylene glycol solution of silver nitrate was slowly added dropwise to the PVP-coated tellurium nanowire dispersion, stirred at room temperature for 2 hours, centrifuged and washed alternately with deionized water and ethanol until the supernatant was colorless. The product was dispersed in a mixed solution of absolute ethanol and hydrazine hydrate, and the volume ratio of absolute ethanol and hydrazine hydrate was 10 / 1, and the product was stirred at room temperature overnight to remove excess PVP. After centrifuging the product, it was washed 5 times alternately with deionized water and ethanol. The precipitated product was dispersed in absolute ethanol and ultrasonicated for 2 h to obtain a uniform PVP-coated silver telluride nanowire ethanol dispersion. Using a nylon filter membrane as ...

Embodiment 2

[0044] A preparation method of a polyvinylpyrrolidone / silver / silver telluride ternary flexible composite thermoelectric film. First, a PVP-coated tellurium nanowire is prepared. Then, the ethylene glycol solution of silver nitrate was slowly added dropwise to the PVP-coated tellurium nanowire dispersion, stirred at room temperature for 2 hours, centrifuged and washed alternately with deionized water and ethanol until the supernatant was colorless. The product is dispersed in a mixed solution of absolute ethanol and hydrazine hydrate, and the volume ratio of absolute ethanol and hydrazine hydrate is 10 / 1. Stir overnight at room temperature to remove excess PVP. After centrifuging the product, it was washed 5 times alternately with deionized water and ethanol. The precipitated product was dispersed in absolute ethanol and ultrasonicated for 2 h to obtain a uniform PVP-coated silver telluride nanowire ethanol dispersion. Using a nylon filter membrane as a substrate, a PVP / silve...

Embodiment 3

[0052] A preparation method of a polyvinylpyrrolidone / silver / silver telluride ternary flexible composite thermoelectric film. First, a PVP-coated tellurium nanowire is prepared. Then, the ethylene glycol solution of silver nitrate was slowly added dropwise to the PVP-coated tellurium nanowire dispersion, stirred at room temperature for 2 hours, centrifuged and washed alternately with deionized water and ethanol until the supernatant was colorless. The product is dispersed in a mixed solution of absolute ethanol and hydrazine hydrate, and the volume ratio of absolute ethanol and hydrazine hydrate is 10 / 1. Stir overnight at room temperature to remove excess PVP. After centrifuging the product, it was washed 5 times alternately with deionized water and ethanol. The precipitated product was dispersed in absolute ethanol and ultrasonicated for 2 h to obtain a uniform PVP-coated silver telluride nanowire ethanol dispersion. Using a nylon filter membrane as a substrate, a PVP / silve...

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Abstract

The present invention relates to a preparation method of a polyvinylpyrrolidone / silver / silver telluride ternary flexible composite thermoelectric film, which comprises the following steps: (1) PVP andtellurium source are taken and dissolved in ethylene glycol; protective gas is introduced, then a reducing agent is added; heating and stirring are performed in oil bath; and a solution A is obtainedafter centrifugal washing and dispersion; (2) silver source is taken and dissolved in ethylene glycol and stirred uniformly to obtain a solution B; (3) the solution B is added dropwise into the solution A and stirring the reaction is performed to obtain a solution C; (4) the solution C is centrifuged and washed to obtain PVP / Ag<2>Te nanowires which are dispersed in absolute ethyl alcohol and subjected to ultrasonic dispersion, then the PVP / Ag<2>Te nanowires are filtered by suction onto a substrate through a vacuum filtration method, and the composite film is obtained by vacuum drying; (5) thecomposite film is subjected to hot pressing treatment to obtain the PVP / Ag / Ag<2>Te flexible composite film supported by the substrate. Compared with the prior art, the invention has simple operationand strong operability, at the same time, the prepared sample has superior thermoelectric performance and flexibility, and can be used in flexible wearable devices.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic-inorganic composite thermoelectric materials, and relates to a preparation method of a polyvinylpyrrolidone / silver / silver telluride ternary flexible composite thermoelectric film. Background technique [0002] Thermoelectric materials and devices have attracted increasing attention in recent years, especially in wearable electronics [Sevilla GA, Inayat SB, Rojas JP, et al. Flexible and semi-transparent thermoelectric energy harvesters from low cost bulk silicon ( 100).Small.2013;9:3916-21,5]. By converting the heat emitted by the human body into electricity, flexible thermoelectric devices can provide durable and reliable power for flexible electronic devices. Compared with the currently used batteries that require frequent charging and replacement, thermoelectric devices hardly require maintenance and human interference, which makes thermoelectric devices have broad application pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H01L35/24H01L35/16H01L35/20H10N10/01H10N10/852H10N10/854H10N10/856
CPCH10N10/852H10N10/854H10N10/856H10N10/01
Inventor 蔡克峰孟秋风
Owner TONGJI UNIV
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