CN114226210A - Silver selenide thermoelectric composite film and preparation method and application thereof - Google Patents
Silver selenide thermoelectric composite film and preparation method and application thereof Download PDFInfo
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- CN114226210A CN114226210A CN202111543796.1A CN202111543796A CN114226210A CN 114226210 A CN114226210 A CN 114226210A CN 202111543796 A CN202111543796 A CN 202111543796A CN 114226210 A CN114226210 A CN 114226210A
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- KDSXXMBJKHQCAA-UHFFFAOYSA-N disilver;selenium(2-) Chemical compound [Se-2].[Ag+].[Ag+] KDSXXMBJKHQCAA-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000007864 aqueous solution Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 24
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 238000000151 deposition Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- -1 Poly ethylene terephthalate Polymers 0.000 claims abstract description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000002576 ketones Chemical class 0.000 claims abstract description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 5
- 239000010408 film Substances 0.000 claims description 55
- 239000006185 dispersion Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 241000282414 Homo sapiens Species 0.000 abstract description 5
- 230000008021 deposition Effects 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 description 10
- 239000004677 Nylon Substances 0.000 description 7
- 229920001778 nylon Polymers 0.000 description 7
- 229920000144 PEDOT:PSS Polymers 0.000 description 5
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- 239000000843 powder Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000005678 Seebeck effect Effects 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
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- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/852—Thermoelectric active materials comprising inorganic compositions comprising tellurium, selenium or sulfur
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a silver selenide thermoelectric composite film, a preparation method and application thereof, belonging to the technical field of thermoelectric films and comprising the following steps: and mixing silver selenide, a solvent, a binder and a PEDOT (Poly ethylene glycol ether ketone) PSS (Poly ethylene terephthalate) aqueous solution, crushing, depositing on a substrate, and drying to obtain the silver selenide thermoelectric composite film. According to the invention, the silver selenide is adopted to prepare the composite film, the particle size of the silver selenide is reduced in the crushing process, the particles are tightly contacted after deposition, the binding tightness among the particles can be further improved by adding the binder, so that the composite film has a higher Seebeck coefficient value, the internal resistance of the film is reduced, and the binding property of the silver selenide and the substrate is improved. The results of the examples show that the thermoelectric device prepared by the composite film prepared by the invention can generate a voltage of 7.4mv by utilizing the temperature difference between human skin and the environment.
Description
Technical Field
The invention relates to the technical field of thermoelectric thin films, in particular to a silver selenide thermoelectric composite thin film and a preparation method and application thereof.
Background
The heat energy is closely related to life, automobile exhaust waste heat, industrial equipment waste heat, heat energy released by human metabolism and the like are used as main forms of unused energy in social life, the thinking of human beings on energy recovery is triggered, and the thermoelectric technology is used as a solution with a good prospect and provides possibility for waste heat recovery.
The thermoelectric device based on the thermoelectric effect has the thermoelectric power generation capacity, can directly convert heat energy into electric energy by means of special semiconductor materials, and realizes energy recycling without pollution and noise. By thermoelectric semiconductor's seebeck effect, when there is the temperature difference at material both ends, the carrier can be because the drive of thermal field flows to the cold junction from the hot junction to form the potential difference at both ends, in order to adapt to complicated diversified heat source surface simultaneously, the thermoelectric device has stepped on the flexibility process, utilizes flexible thermoelectric device to become the research direction of hot door down for wearable electronic equipment self-power. It is common practice to achieve flexible applications of inorganic materials by means of flexible substrates.
Ag2Se has good conductivity and higher Seebeck coefficient, and can be used for manufacturing a generator at room temperature.
Therefore, how to improve the thermoelectric performance of the silver selenide thermoelectric composite film becomes a difficult problem in the prior art.
Disclosure of Invention
The invention aims to provide a silver selenide thermoelectric composite film, and a preparation method and application thereof. The composite film prepared by the preparation method provided by the invention has excellent thermoelectric performance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a silver selenide thermoelectric composite film, which comprises the following steps:
(1) mixing silver selenide, a solvent, a binder and a PEDOT (Poly ethylene glycol ether ketone) PSS (Poly ethylene terephthalate) aqueous solution, and then crushing to obtain a dispersion liquid;
(2) and (2) depositing the dispersion liquid obtained in the step (1) on a substrate, and then drying to obtain the silver selenide thermoelectric composite film.
Preferably, the binder in step (1) comprises sodium carboxymethyl cellulose, acrylic polyurethane or epoxy resin.
Preferably, the mass ratio of the silver selenide to the binder in the step (1) is (5-7): 1.
preferably, the particle size of the silver selenide in the dispersion liquid in the step (1) is 1-800 nm.
Preferably, the total concentration of PEDOT and PSS in the PEDOT/PSS aqueous solution is 10-20 g/L.
Preferably, the ratio of the mass of the silver selenide in the step (1) to the volume of the PEDOT/PSS aqueous solution is 1mg (0.001-0.005) mL.
Preferably, the solvent in step (1) comprises absolute ethanol or water.
Preferably, the pulverization is carried out in an ultrasonic cell pulverizer; the power of the ultrasonic cell crusher is 100-120W, and the crushing time is 20-60 min.
The invention provides the silver selenide thermoelectric composite film prepared by the preparation method in the technical scheme.
The invention also provides the application of the silver selenide thermoelectric composite film in the thermoelectric device.
The invention provides a preparation method of a silver selenide thermoelectric composite film, which comprises the following steps: (1) mixing silver selenide, a solvent, a binder and a PEDOT (Poly ethylene glycol ether ketone) PSS (Poly ethylene terephthalate) aqueous solution, and then crushing to obtain a dispersion liquid; (2) and (2) depositing the dispersion liquid obtained in the step (1) on a substrate, and then drying to obtain the silver selenide thermoelectric composite film. According to the invention, the silver selenide is adopted to prepare the composite film, the particle size of the silver selenide is reduced in the crushing process, the particles are in close contact after deposition, and the binding tightness among the particles can be further improved by adding the binder, so that the composite film has a higher Seebeck coefficient value, the internal resistance of the film is reduced, the binding property of the silver selenide and the substrate is improved, and the excellent flexibility of the film is ensured; PSS aqueous solution is added, and the high conductivity characteristic of the aqueous solution is utilized to further reduce the internal resistance of the film, improve the thermoelectric property of the film and play a role in auxiliary adhesion; adding a binder and PEDOT, namely crushing the PSS aqueous solution and the silver selenide together, so that the silver selenide can be more fully contacted with other components, and the thermoelectric property of the film is further improved. The results of the examples show that the thermoelectric device prepared by the composite film prepared by the invention can generate 7.4mv of voltage by utilizing the temperature difference between human skin and the environment.
Drawings
FIG. 1 is a photomicrograph of a silver selenide thermoelectric composite film made in example 1 of the present invention;
fig. 2 is an SEM image of the silver selenide thermoelectric composite film prepared in example 1 of the present invention.
Detailed Description
The invention provides a preparation method of a silver selenide thermoelectric composite film, which comprises the following steps:
(1) mixing silver selenide, a solvent, a binder and a PEDOT (Poly ethylene glycol ether ketone) PSS (Poly ethylene terephthalate) aqueous solution, and then crushing to obtain a dispersion liquid;
(2) and (2) depositing the dispersion liquid obtained in the step (1) on a substrate, and then drying to obtain the silver selenide thermoelectric composite film.
The sources of the components are not particularly limited in the present invention unless otherwise specified, and may be those obtained by commercially available products or conventional production methods well known to those skilled in the art.
The silver selenide, the solvent, the binder and the aqueous solution of PEDOT and PSS are mixed and crushed to obtain the dispersion liquid.
In the invention, the particle size of the silver selenide is preferably 1-50 μm, more preferably 5-40 μm, and most preferably 10-30 μm. The invention limits the particle size of the silver selenide within the range, can fully crush the silver selenide in the crushing process to obtain the nano-grade silver selenide, ensures that the combination between the silver selenide particles and the substrate is tighter, has higher Seebeck coefficient value and lower film internal resistance, and further improves the thermoelectric property of the composite film.
When the particle size of the silver selenide is not within the above range, the present invention preferably grinds the silver selenide.
In the present invention, the grinding is preferably wet grinding. The silver selenide and the N-methyl pyrrolidone are mixed and ground preferably in the invention. The invention uses N-methyl pyrrolidone for wet grinding, and has better grinding effect.
In the invention, the grinding times are preferably 3-5 times; the end point of each grinding is preferably complete volatilization of the solvent. In the invention, the ratio of the mass of the silver selenide to the volume of the solvent is preferably (50-150 mg) in each grinding: 1mL, more preferably 100 mg: 1 mL. According to the invention, the grinding times and the volume ratio of the silver selenide to the solvent are limited in the above range, so that the silver selenide can be fully ground to obtain the silver selenide with a smaller particle size.
In the present invention, the solvent preferably includes absolute ethanol or water, and more preferably, absolute ethanol.
In the invention, the ratio of the mass of the silver selenide to the volume of the solvent is preferably 1mg (0.1-0.3) mL, more preferably 1mg (0.15-0.25) mL, and most preferably 1mg:0.2 mL. The invention limits the mass ratio of the silver selenide to the volume ratio of the solvent in the range, so that the silver selenide can be dispersed more fully.
In the present invention, the binder preferably includes sodium carboxymethyl cellulose, acrylic urethane, or epoxy resin.
In the invention, the mass ratio of the silver selenide to the binder is preferably (5-7): 1, more preferably 6: 1. The invention limits the types of the binders, the mass ratio of the silver selenide to the binders in the above range, can enable the combination between the silver selenide particles and the substrate to be more compact, and meanwhile, the binders have the film forming effect, can enable the thermoelectric conversion property of the silver selenide to be fully exerted, and further improves the thermoelectric performance of the film.
In the invention, the total concentration of PEDOT and PSS in the PEDOT/PSS aqueous solution is preferably 10-20 g/L, more preferably 12-18 g/L, and most preferably 14-16 g/L. The mass ratio of PEDOT to PSS in the aqueous solution of PEDOT to PSS is not particularly limited in the present invention, and commercially available products well known to those skilled in the art can be used. In the invention, the PEDOT/PSS aqueous solution has high conductivity and can play a role in auxiliary adhesion, thereby further improving the thermoelectric property of the film.
In the invention, the ratio of the mass of the silver selenide to the volume of the PEDOT/PSS aqueous solution is preferably 1mg (0.001-0.005) mL, more preferably 1mg (0.002-0.004) mL, and most preferably 1 mg/0.003 mL.
According to the invention, the quality of the silver selenide and the volume ratio of PEDOT to PSS aqueous solution are limited in the range, so that the thermoelectric property of the film can be further improved.
The operation of mixing the silver selenide, the solvent, the binder and the aqueous solution of PEDOT and PSS is not particularly limited, and the materials are uniformly mixed by adopting the technical scheme of material mixing which is well known by the technical personnel in the field.
In the present invention, the pulverization is preferably carried out in an ultrasonic cell pulverizer; the power of the ultrasonic cell crusher is preferably 100-120W, and more preferably 110W; the grinding time is preferably 20-60 min, more preferably 30-50 min, and most preferably 40 min. The invention limits the power and time of the ultrasonic cell crusher within the range, can fully crush the silver selenide to form nano-silver selenide, and the combination between silver selenide particles and between the silver selenide particles and the substrate is tighter, thereby further improving the thermoelectric property of the film.
In the invention, the particle size of the crushed silver selenide is preferably 1-800 nm, more preferably 10-500 nm, and most preferably 50-200 nm. The invention limits the particle size of the crushed silver selenide within the range, can enable the silver selenide particles and the substrate to be combined more tightly, and further improves the thermoelectric property of the film.
After the dispersion liquid is obtained, the silver selenide thermoelectric composite film is obtained by depositing the dispersion liquid on a substrate and then drying.
In the present invention, the substrate preferably comprises nylon filter paper or slow set filter paper, more preferably nylon filter paper. In the invention, the aperture of the nylon filter paper is preferably 0.1-0.5 μm. The invention limits the aperture of the nylon filter paper in the range, and can fully intercept the substances in the dispersion liquid.
In the present invention, the deposition is preferably vacuum filtration; the relative pressure difference of the vacuum filtration is preferably-0.05 to-0.07 MPa, and more preferably-0.06 MPa. The invention has no special limit on the vacuum filtration time, and can ensure that the solvent in the dispersion liquid is sufficiently filtered.
In the invention, the drying temperature is preferably 60-80 ℃, and more preferably 70 ℃; the drying time is preferably 30-60 min, and more preferably 40-50 min.
According to the invention, the silver selenide is adopted to prepare the composite film, the particle size of the silver selenide is reduced in the crushing process, the particles are in close contact after deposition, and the binding tightness among the particles can be further improved by adding the binder, so that the composite film has a higher Seebeck coefficient value, the internal resistance of the film is reduced, the binding property of the silver selenide and the substrate is improved, and the excellent flexibility of the film is ensured; PSS aqueous solution is added, and the high conductivity characteristic of the aqueous solution is utilized to further reduce the internal resistance of the film, improve the thermoelectric property of the film and play a role in auxiliary adhesion; and controlling the process parameters such as the types and the dosages of the components to obtain the composite film with excellent thermoelectric property.
The invention provides the silver selenide thermoelectric composite film prepared by the preparation method in the technical scheme.
In the invention, the thickness of the silver selenide thermoelectric composite film is preferably 100-200 μm. The thickness of the silver selenide thermoelectric composite film is limited within the range, so that current carriers can more fully flow from the hot end to the cold end under the action of heat energy, and a larger potential difference is formed.
The composite film provided by the invention has excellent thermoelectric performance.
The invention also provides the application of the silver selenide thermoelectric composite film in the thermoelectric device.
The silver selenide thermoelectric composite film is preferably cut and then packaged to obtain the thermoelectric device.
The cutting operation is not particularly limited in the present invention, and the cutting operation may be performed by a cutting method known to those skilled in the art.
In the present invention, the package preferably uses a polyimide tape. The operation of the package is not particularly limited in the present invention, and the package technical scheme known to those skilled in the art may be adopted.
The operation of the silver selenide thermoelectric composite film applied to the thermoelectric device is not particularly limited, and the silver selenide thermoelectric composite film applied to the thermoelectric device is well known to those skilled in the art.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
(1) Putting 200mg of silver selenide particles (10-100 mu m) into a grinding pot, adding 2 mLN-methyl pyrrolidone, grinding by using a grinding rod until the solvent is completely volatilized, adding 2 mLN-methyl pyrrolidone, repeating for 4 times for 20min to obtain silver selenide powder (1-50 mu m);
(2) mixing the silver selenide powder obtained in the step (1), 30mg of sodium carboxymethylcellulose, 0.5mL of PEDOT: PSS aqueous solution (the total concentration of PEDOT and PSS is 15g/L, PEDOT: PSS is purchased from an Aladdin platform, CAS number is 155090-83-8) and 25mL of absolute ethyl alcohol (the mass ratio of silver selenide to sodium carboxymethylcellulose is 6.7:1, the volume ratio of silver selenide to the PEDOT: PSS aqueous solution is 1mg: 0.0025mL, the mass ratio of silver selenide to absolute ethyl alcohol is 1mg:0.125mL), stirring for 10min by using a glass rod, putting into an ultrasonic cell crusher for crushing, wherein the power is 110W, the time is 30min, the ultrasonic on time is 2s, the ultrasonic off time is 3s, and the alarm temperature is 70 ℃ to obtain a dispersion liquid;
(3) selecting a nylon filter paper with the diameter of 4cm and the aperture of 0.2 mu m, placing the nylon filter paper in a vacuum filtration device as a filtration membrane, dripping the dispersion liquid obtained in the step (2) into a cylindrical glass funnel for vacuum filtration, wherein the relative pressure difference is-0.06 MPa, and drying at 70 ℃ for 40min after the filtration is finished to obtain the silver selenide thermoelectric composite film.
Example 2
The mass of sodium carboxymethylcellulose in step (2) of example 1 was replaced with 40mg, and the mass ratio of silver selenide to sodium carboxymethylcellulose was 5:1, and the other parameters were the same as those of example 1.
Example 3
The volume of the aqueous solution of PEDOT: PSS in step (2) of example 1 was replaced with 0.8mL, when the mass of silver selenide and the volume ratio of the aqueous solution of PEDOT: PSS were 1mg: 0.004mL, and the other parameters were the same as in example 1.
The picture of the silver selenide thermoelectric composite film prepared in example 1 is shown in fig. 1, and it can be seen from fig. 1 that silver selenide particles are densely deposited on nylon filter paper, the film has good flexibility and no cracking or powder dropping phenomenon.
The SEM image of the silver selenide thermoelectric composite film prepared in example 1 was tested, and the result is shown in fig. 2. As can be seen from fig. 2, the thin film has a thickness of about 160 μm, and the thermoelectric material and the flexible substrate are physically closely bonded.
The silver selenide thermoelectric composite film prepared in the embodiment 1 is cut into strips with the width of 8mm and the length of 30mm, and is packaged by PI adhesive tape to prepare a flexible wearable thermoelectric device, and the voltage of about 7.4mV can be generated by utilizing the temperature difference between human skin and the environment, so that the silver selenide thermoelectric composite film is expected to be further applied to wearable devices.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a silver selenide thermoelectric composite film comprises the following steps:
(1) mixing silver selenide, a solvent, a binder and a PEDOT (Poly ethylene glycol ether ketone) PSS (Poly ethylene terephthalate) aqueous solution, and then crushing to obtain a dispersion liquid;
(2) and (2) depositing the dispersion liquid obtained in the step (1) on a substrate, and then drying to obtain the silver selenide thermoelectric composite film.
2. The method according to claim 1, wherein the binder in step (1) comprises sodium carboxymethyl cellulose, acrylic polyurethane or epoxy resin.
3. The preparation method according to claim 1 or 2, wherein the mass ratio of the silver selenide to the binder in the step (1) is (5-7): 1.
4. the preparation method according to claim 1, wherein the particle size of the silver selenide in the dispersion liquid in the step (1) is 1 to 800 nm.
5. The method according to claim 1, wherein the total concentration of PEDOT and PSS in the aqueous solution of PEDOT and PSS is 10-20 g/L.
6. The preparation method according to claim 1, wherein the ratio of the mass of silver selenide in the step (1) to the volume of the aqueous solution of PEDOT to PSS is 1mg (0.001-0.005) mL.
7. The method according to claim 1, wherein the solvent in the step (1) comprises absolute ethanol or water.
8. The method for producing according to claim 1, wherein the pulverization is carried out in an ultrasonic cell pulverizer; the power of the ultrasonic cell crusher is 100-120W, and the crushing time is 20-60 min.
9. The silver selenide thermoelectric composite film prepared by the preparation method of any one of claims 1 to 8.
10. Use of the silver selenide thermoelectric composite thin film of claim 9 in a thermoelectric device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115594874A (en) * | 2022-11-07 | 2023-01-13 | 南方科技大学（Cn） | P (VDF-TrFE) composite film and preparation method and application thereof |
| CN117812985A (en) * | 2024-03-01 | 2024-04-02 | 中北大学 | Flexible photo-thermal electric detection device based on spraying method and preparation method thereof |
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