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Flexible strontium titanate nanofiber-based composite thermoelectric thin film and preparation method thereof

A thermoelectric thin film and fiber-based technology, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric device node lead-out materials, thermoelectric devices that only use the Peltier or Seebeck effect, etc., can solve the problems of flexible thermoelectric films that are not resistant to high temperatures, etc.

Active Publication Date: 2021-05-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a flexible strontium titanate nanofiber-based composite thermoelectric film and its preparation method, which overcomes the problems of the brittleness of thermoelectric ceramic oxides and the high temperature resistance of flexible thermoelectric films in the prior art

Method used

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  • Flexible strontium titanate nanofiber-based composite thermoelectric thin film and preparation method thereof
  • Flexible strontium titanate nanofiber-based composite thermoelectric thin film and preparation method thereof
  • Flexible strontium titanate nanofiber-based composite thermoelectric thin film and preparation method thereof

Examples

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Embodiment 1

[0041] (1) Preparation of strontium titanate precursor gel fiber film: 1) Weigh 0.5g PVP (Anaiji, molecular weight 1300000), dissolve it in the mixed solution of water, ethanol and acetic acid (the volumes are 1, 6.35, 3.8ml, the addition of acetic acid is to control the subsequent hydrolysis of tetrabutyl titanate), magnetically stirred for 2 hours, added 286mg of strontium acetate (McLean, AR, 99%), stirred for 2 hours until completely dissolved, and finally added dropwise 473 μL of tetrabutyl titanate (Aladdin, CP, 98.0%) was reacted for 3 hours to prepare a spinning solution. 2) The spinning solution configured above was prepared by electrospinning into a strontium titanate precursor gel fiber film, and the spinning conditions were as follows: the applied voltage was 19kV, the feed rate was 0.2mL / h, and the fiber was coated with silicone oil The paper is received on a flat plate, the distance between the spinneret and the receiving plate is 15 cm, and the air humidity is a...

Embodiment 2

[0044] (1) Preparation of strontium titanate precursor gel fiber film doped with yttrium element: 1) Weigh 0.5g PVP (Anaiji, molecular weight 1300000), dissolve it in the mixed solution of water, ethanol and acetic acid (the volumes are respectively 1, 6.35, 3.8ml, the addition of acetic acid is to control the subsequent hydrolysis of tetrabutyl titanate), magnetic stirring for 2 hours, adding 257mg of strontium acetate (McLean, AR, 99%) and 47mg of yttrium acetate (Anaiji , REO, 99.99%), stirred for 2 hours until completely dissolved, and finally added dropwise 473 μL of tetrabutyl titanate (Aladdin, CP, 98.0%), and reacted for 3 hours to prepare a spinning solution. 2) The spinning solution configured above was prepared by electrospinning into a strontium titanate precursor gel fiber film, and the spinning conditions were as follows: the applied voltage was 17kV, the feed rate was 0.5mL / h, and the fiber was coated with silicone oil. The paper is received on a roll, the roll ...

Embodiment 3

[0047] (1) Preparation of strontium titanate precursor gel fiber film doped with lanthanum element: 1) Weigh 0.5g PVP (molecular weight 1300000), dissolve it in the mixed solution of water, ethanol and acetic acid (volumes are 1, 6.35, 3.8ml, the addition of acetic acid is in order to control the subsequent hydrolysis of tetrabutyl titanate), after magnetic stirring for 2 hours, add 257mg strontium acetate (McLean, AR, 99%) and 30mg lanthanum acetate (McLean, metals basis, 99.99 %), continue to stir for 2 hours until completely dissolved, and finally add 473 μL of tetrabutyl titanate (Aladdin, CP, 98.0%) dropwise, and react for 3 hours to form a spinning solution. 2) Electrospinning the above-mentioned spinning solution to prepare a strontium titanate precursor gel fiber film, the spinning conditions are as follows: the applied voltage is 20kV, the feed rate is 1mL / h, and the fiber is coated with silicone oil paper Receive on the drum, the rotating speed of the drum is 60rpm, ...

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Abstract

The invention relates to a flexible strontium titanate nanofiber-based composite thermoelectric thin film and a preparation method thereof, and the thermoelectric thin film is obtained through reduction treatment by using raw materials containing a strontium titanate-based ceramic fiber film and graphene oxide. The thin film has excellent thermal stability and air stability, can stably work at high temperature, has good flexibility and is easy to process into a flexible thermoelectric device, and the method provides a new way for preparing the flexible ceramic thermoelectric thin film and has important significance for development of the high-temperature flexible thermoelectric device.

Description

technical field [0001] The invention belongs to the field of composite thermoelectric film and its preparation, in particular to a flexible strontium titanate nanofiber-based composite thermoelectric film and its preparation method. Background technique [0002] In recent years, the energy crisis and environmental pollution have attracted widespread attention. Most of the heat is dissipated in the form of waste heat, which is undoubtedly a waste of energy and further aggravates environmental problems. Thermoelectric conversion technology can realize the direct conversion of thermal energy to electrical energy. Based on the thermoelectric material based on the Seebeck effect, the carriers migrate from the hot end to the cold end under the drive of temperature difference, forming a potential difference, thereby realizing thermoelectric conversion. The current development of flexible thermoelectric materials meets people's needs for wearable electronic devices. The flexibility ...

Claims

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Application Information

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IPC IPC(8): H01L35/14H01L35/28H01L35/34
CPCH10N10/851H10N10/10H10N10/01
Inventor 赵伟张骐昊王连军周蓓莹郑琦江莞
Owner DONGHUA UNIV
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