Room-temperature-based thermoelectric material containing infinite conjugated polymer and preparation method of room-temperature-based thermoelectric material

A technology of conjugated polymers and thermoelectric materials, which can be applied in the direction of thermoelectric device junction lead-out materials, etc., can solve the problems of low conductivity and difficult application, and achieve the effect of thermal performance optimization.

Active Publication Date: 2022-05-10
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Application Information

AI Technical Summary

Problems solved by technology

The inherently low electrical conductivity of ICPs materials (10-13~10-1Scm-1) makes it difficult to be used alone in the field of thermoelectricity
[0007]However, there are many types of metal sites and ligand structures in conjugated polymers, and the chemical properties vary widely. Exploring infinite conjugated polymers that can be effectively used

Method used

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  • Room-temperature-based thermoelectric material containing infinite conjugated polymer and preparation method of room-temperature-based thermoelectric material
  • Room-temperature-based thermoelectric material containing infinite conjugated polymer and preparation method of room-temperature-based thermoelectric material
  • Room-temperature-based thermoelectric material containing infinite conjugated polymer and preparation method of room-temperature-based thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Tetrahydroxythiophenol is coordinated with copper to obtain infinitely conjugated polymer CuHT, the specific steps are as follows:

[0049] First, weigh 0.882g (7.0mmol) of 4-hydroxythiophenol (hydroxythiophenol) and add it to a 100ml round-bottomed flask with a condenser tube containing 50ml of absolute ethanol, and add 0.500g (3.5mmol) of oxidized Cuprous, after exhausting three times, nitrogen was introduced, put into a constant temperature oil bath at 85°C, stirred continuously, and reacted for 48 hours. When the solution turns yellow, take it out, pass through 3×10ml ethanol, 3×100ml deionized water, 2×10ml ether, and dry the obtained sample in a vacuum oven at 40°C for 12 hours to obtain CuHT.

[0050] Preparation of p-type Bi by melting method 0.5 Sb 1.5 Te 3 After 4 hours of high-energy ball milling, the infinitely conjugated polymer CuHT and p-type Bi 0.5 Sb 1.5 Te 3 The two substances were loaded into a ball mill tank according to the metering ratio, CuH...

Embodiment 5

[0067] On the basis of Example 1, the content of the infinitely conjugated polymer was varied, wherein CuHT accounted for 10% of the total mass, the sintering temperature was 450° C., and the others were the same as in Example 1.

Embodiment 6

[0076] On the basis of Example 1, in this example, p-type Bi 0.3 Sb 1.7 Te 3 After 4 hours of high-energy ball milling, the infinitely conjugated polymer CuHT and p-type Bi 0.3 Sb 1.7 Te 3 The two substances were loaded into a ball mill tank according to the metering ratio, CuHT accounted for 5% of the total mass, and ball milled for 6 minutes to obtain a composite material powder. Put the obtained composite material powder into a graphite mold, heat press at 450°C sintering temperature, discharge plasma sintering process at 50MPa for 6 minutes, and obtain the thermoelectric material Bi 0.3 Sb 1.7 Te 3 / CuHT 5 , where 5 represents that CuHT accounts for 5% of the total mass.

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Abstract

The invention provides a room-temperature-based thermoelectric material containing an infinite conjugated polymer and a preparation method thereof, and the preparation method comprises the following steps: carrying out the mixing and ball milling of the infinite conjugated polymer and p-type bismuth telluride Bi (2-x) SbxTe3, and obtaining composite material powder, 0 < x < = 2; and carrying out hot-pressing discharge plasma sintering on the composite material powder at 240-450 DEG C to obtain the thermoelectric material, wherein the infinite conjugated polymer is a metal-based infinite conjugated polymer synthesized from an organic ligand shown in the following structural formula (1) and metal elements; wherein R is amino or sulfydryl, and R'is sulfydryl, hydroxyl, carboxyl or amido.By means of the technical scheme, the carrier concentration and lattice thermal conductivity of the thermoelectric material are cooperatively regulated and controlled, the electrical and thermal properties of the thermoelectric material are improved, and a new thought is provided for obtaining the high-performance thermoelectric material.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, in particular to a room temperature-based thermoelectric material containing infinitely conjugated polymers and a preparation method thereof. Background technique [0002] Thermoelectric materials are green functional materials that use the directional movement of carriers inside solids to achieve direct mutual conversion of thermal energy and electrical energy. The use of thermoelectric materials can convert the waste heat in production and life into electrical energy through temperature difference power generation, improve the efficiency of traditional energy use, and can also energize thermoelectric materials to achieve solid-state refrigeration. Thermoelectric conversion devices with thermoelectric materials as the core have the characteristics of small size, high reliability, wide operating temperature range, and environmental friendliness. Environmental pollution is one of...

Claims

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Application Information

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IPC IPC(8): C08L87/00C08K3/30C08G83/00H01L35/24H01L35/16
CPCC08K3/30C08G83/008H10N10/856H10N10/852C08L87/00
Inventor 张倩王晓东何伙伦曹峰毛俊刘兴军
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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