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Method for preparing flexible N type silver telluride nanowire thermoelectric thin film

A technology of thermoelectric thin film and silver telluride, applied in the direction of thermoelectric device lead-out wire materials, etc., can solve the problems of complex preparation process, poor flexibility, high cost, etc., and achieve the effect of excellent thermoelectric performance, good flexibility, and short preparation cycle

Active Publication Date: 2017-03-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, flexible thermoelectric materials based on silver telluride are prepared from composite materials containing silver telluride nanoparticles, the preparation process is complicated, the cost is high, and the flexibility is poor.

Method used

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  • Method for preparing flexible N type silver telluride nanowire thermoelectric thin film
  • Method for preparing flexible N type silver telluride nanowire thermoelectric thin film
  • Method for preparing flexible N type silver telluride nanowire thermoelectric thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) ultrasonically disperse 30 mg of silver telluride nanowires and 1.5 mg of polyvinylpyrrolidone in 5 mL of ethylene glycol to obtain a silver telluride nanowire dispersion;

[0034] (2) With the assistance of vacuum filtration, evenly drop-coat 0.75mL of silver telluride nanowire dispersion on a 2.5cm×0.5cm glass fiber filter membrane, and drain the liquid; The glass fiber filter membrane was vacuum-dried at 75°C to obtain a silver telluride nanowire film adhered to the glass fiber filter membrane. The scanning electron microscope photos are as follows: figure 1 shown;

[0035] (3) the silver telluride nanowire thin film adhered on the glass fiber filter membrane that step (2) obtains is clamped between two copy papers, transfers in the tablet press, under 30MPa pressure extrusion molding, makes The silver telluride nanowire film is transferred to a piece of copy paper, and then the glass fiber filter fragments on the back of the silver telluride nanowire film are s...

Embodiment 2

[0043] (1) ultrasonically disperse 35 mg of silver telluride nanowires and 3.5 mg of polyvinylpyrrolidone in 7 mL of ethylene glycol to obtain a silver telluride nanowire dispersion;

[0044] (2) With the assistance of vacuum filtration, evenly drop-coat 1.0mL of silver telluride nanowire dispersion on a 2.5cm×0.5cm glass fiber filter membrane, and drain the liquid; The glass fiber filter membrane was vacuum-dried at 75° C. to obtain a silver telluride nanowire film adhered to the glass fiber filter membrane;

[0045] (3) the silver telluride nanowire thin film adhered on the glass fiber filter membrane that step (2) obtains is sandwiched between two copy papers, transferred in the tablet press, extruded under 10MPa pressure, then Use a brush to sweep away the glass fiber filter fragments on the back of the silver telluride nanowire film to obtain paper with the silver telluride nanowire film;

[0046] (4) Finally, put the paper with silver telluride nanowire thin film obtain...

Embodiment 3

[0048] (1) ultrasonically disperse 40 mg of silver telluride nanowires and 10 mg of polyvinylpyrrolidone in 10 mL of ethylene glycol to obtain a silver telluride nanowire dispersion;

[0049](2) With the assistance of vacuum filtration, evenly drop-coat 0.90mL of silver telluride nanowire dispersion on a 2.5cm×0.5cm glass fiber filter membrane, and drain the liquid; The glass fiber filter membrane was vacuum-dried at 75° C. to obtain a silver telluride nanowire film adhered to the glass fiber filter membrane;

[0050] (3) the silver telluride nanowire film adhered on the glass fiber filter membrane that step (2) obtains is sandwiched between two copy papers, transferred in the tablet press, extruded under 5MPa pressure, then Use a brush to sweep away the glass fiber filter fragments on the back of the silver telluride nanowire film to obtain paper with the silver telluride nanowire film;

[0051] (4) Finally, place the paper with the silver telluride nanowire film obtained in...

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Abstract

The invention discloses a method for preparing a flexible N type silver telluride nanowire thermoelectric thin film. The method includes the following steps: mixing a silver telluride nanowire with polyvinylpyrrolidone, and performing ultrasonic dispersion of the mixture in a solvent to obtain a silver telluride nanowire dispersion liquid; under the condition of vacuum filtration, uniformly dripping the silver telluride nanowire dispersion liquid on a glass fiber filter membrane, and performing vacuum drying at 75 DEG C to obtain a silver telluride nanowire thin film adhered to the glass fiber filter membrane; clamping the silver telluride nanowire thin film between two pieces of copy paper, placing the whole in a tablet press to perform extrusion forming, then using a brush to remove glass fiber filter membrane fragments on the reverse side of the silver telluride nanowire thin film, and placing the silver telluride nanowire thin film in a vacuum oven for annealing to obtain a target product. The method for preparing the flexible N type silver telluride nanowire thermoelectric thin film is simple and controllable, short in preparation cycle, safe and pollution-free, and low in energy consumption, an obtained thin film has excellent thermoelectric performance and good flexibility, flexible thermoelectric thin films of different sizes and shapes can be prepared flexibly according to the sizes and shapes of glass fiber membranes, and thus the method has wide application prospects.

Description

[0001] Technical field: [0002] The invention relates to the technical field of new energy materials, in particular to a method for preparing a flexible N-type silver telluride nanowire thermoelectric film. [0003] Background technique: [0004] Thermoelectric materials can directly convert electric energy and heat energy. Thermoelectric power generation devices and refrigeration devices made of thermoelectric materials have the characteristics of compact structure, no noise, no pollution during operation, and waste energy can be recycled. They are used in military, medical, aerospace , microelectronics and even household appliances and other fields have broad application prospects. Compared with commercial bulk thermoelectric materials, flexible thermoelectric materials have unique advantages such as bendability, small weight, simple process, and wide application range. In recent years, they have attracted more and more attention from the scientific research community and th...

Claims

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Application Information

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IPC IPC(8): H01L35/16
CPCH10N10/852
Inventor 苗蕾高杰刘呈燕王潇漾彭英
Owner GUILIN UNIV OF ELECTRONIC TECH
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