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PH-regulated p-type and n-type conversion thermoelectric material and preparation method

A kind of thermoelectric material and n-type technology, which is applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve the problem of low electrical conductivity, etc., to improve electrical conductivity, improve film formation, and improve dispersibility Effect

Pending Publication Date: 2019-06-04
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Recently, some progress has been made in stable organic n-type thermoelectric materials, and some stable organic n-type thermoelectric materials exhibit high Seebeck coefficients, such as the Seebeck coefficient of self-doped peryleneimide derivatives is -600 μV / K (B.Russal et al. Advanced Materials, 2014, 26(21): 3473), the Seebeck coefficient of (aniline-polyoxyethylene-aniline) triblock copolymer is -1171 μV / K (X. Cheng et al. Macromolecular Chemistry and Physics, 2018, 219(9): 1700635), but their disadvantage is that the conductivity is too low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve 15 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;

[0033] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;

[0034] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;

[0035] (4) Add 1 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;

[0036] (5) Adjust the mixed solution C to pH = 3 with tris / HCl buffer regulator to obtain the mixed solution D;

[0037] (6) The mixture D was magnetically stirred at room temperature for 24 hours to obtain the mixture;

[0038] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;

[0039] (8) The black filter membrane was dried in a vacuum oven at 80 °C for 4 h to obtain a polyethyleneimine / carbon nanotube composite ther...

Embodiment 2

[0041] (1) Dissolve 10 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;

[0042] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;

[0043] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;

[0044] (4) Add 0.5 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;

[0045] (5) Adjust the mixed solution in step (4) to pH=7 with tris / HCl buffer regulator to obtain mixture D;

[0046] (6) The mixture D was magnetically stirred at room temperature for 48 h to obtain the mixture;

[0047] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;

[0048] (8) The black filter membrane was dried in a vacuum oven at 60 °C for 6 h to obtain a polyethyleneimine / carbon nanotube composite thermoele...

Embodiment 3

[0050] (1) Dissolve 8 mg of sodium dodecylbenzenesulfonate in 30 mL of water to obtain mixed solution A;

[0051] (2) Add 5 mg of single-walled carbon nanotubes to the mixture A to obtain the mixture B;

[0052] (3) Magnetically stir the mixture B at room temperature for 5 min, and continue to sonicate for 10 min;

[0053](4) Add 0.5 g of polyethyleneimine (M.W.600) to the mixed solution B in step (3), and continue to sonicate for 30 min to obtain the mixed solution C;

[0054] (5) Adjust the mixed solution C to pH = 9 with tris / HCl buffer regulator to obtain the mixed solution D;

[0055] (6) The mixture D was magnetically stirred at room temperature for 48 h to obtain the mixture;

[0056] (7) Wash the mixture three times with water, three times with ethanol, and filter under reduced pressure to obtain a black filter membrane;

[0057] (8) The black filter membrane was dried in a vacuum oven at 45 °C for 12 h to obtain a polyethyleneimine / carbon nanotube composite thermoe...

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Abstract

The invention discloses a pH-regulated p-type and n-type conversion thermoelectric material and a preparation method thereof. The method improves the n-type stability of a polyethyleneimine / carbon nanotube thermoelectric material by polyethyleneimine doping and pH regulation, a pH-regulated p / n conversion polyethyleneimine / carbon nanotube thermoelectric material is provided, and also, a new polyethyleneimine / carbon nanotube thermoelectric material preparation method with simple and convenient operation, good film formation, high conductivity and p / n regulation is provided.

Description

technical field [0001] The invention relates to the field of thermoelectric materials, in particular to a thermoelectric material with p-type and n-type transformation controlled by pH and a preparation method thereof. Background technique [0002] Thermoelectric materials are materials that directly convert "heat" into "electricity" without relying on any external energy and without mechanical components. Using the temperature difference between human body temperature and the surrounding environment to generate electricity, thermoelectric materials have become an effective solution for self-powered technology of portable smart electronic devices. [0003] The thermoelectric conversion efficiency of the material ZT=S 2 σT / κ (where S, σ, T, and κ are Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively. [0004] Inorganic thermoelectric materials such as Te, Bi and their compounds have high thermoelectric conversion effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/24H01L35/34H10N10/856H10N10/01
Inventor 张云飞樊梓汐刘辉杜飞鹏李亮鄢国平
Owner WUHAN INSTITUTE OF TECHNOLOGY
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