TW201101552A - Thermoelectric convertion material - Google Patents

Abstract

The present invention provides a thermoelectric conversion material which is flexible and has a relatively high thermoelectric conversion efficiency. The thermoelectric conversion material includes a carbon nanotube structure and a conductive polymer layer. The carbon nanotube structure includes a plurality of carbon nanotubes. The conductive polymer layer forms a coating on a surface of the carbon nanotubes.

Description

201101552 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a thermoelectric conversion material, and more particularly to a flexible thermoelectric conversion material. [Prior Art] • (10)02] Thermoelectric effect means that when the temperature at both ends of the object is different (ie, there is a temperature gradient inside the object), the carriers in the object will diffuse from the high temperature zone to the low temperature zone along the temperature gradient. The number of carriers in the low temperature region is gradually increased more than the high temperature region, and the built-in electric field is established from the rain. 〇 The built-in electric field will force the carrier to perform a drift motion that is opposite to the diffusion motion. Finally, the drift is involved in the balance of the diffusion motion, so that there is a constant potential difference across the object. The main parameter for measuring the thermoelectric effect is the Seeback coefficient. The Seebeck coefficient is equal to the potential difference across the object divided by the temperature difference across the object. It is defined that when the carrier is a hole, the Seebeck coefficient is positive, and when the carrier is an electron, the Seebeck coefficient is negative 〇t〇〇〇3] An important performance index of the thermoelectric conversion material: the coefficient of merit The larger the figure of merit Z=S2c/ic, the higher the thermoelectric conversion efficiency of the thermoelectric conversion material. In the formula

S 098120773 Form No. A0101 Page 3 of 24 0982035400-0 201101552 Zebeck coefficient, σ system conductivity, thermal conductivity. The larger the κ σ is, the smaller the material resistance is, and the smaller the thermoelectric performance is due to Joule heat; the smaller the κ, the smaller the heat conduction loss from the hot end to the cold end. Increasing the value of enthalpy can increase the efficiency of power generation or cooling. due to

The contribution of the squared term on the S-system molecule, so the Seebeck coefficient of the material is increased.

S is the main means of increasing the figure of merit Ζ value. [0004] The thermoelectric effect of metal conductors was discovered more than 170 years ago, but due to the weak thermoelectric effect of metals, its application has long been limited to measuring temperature as a thermocouple. Some semiconductor materials were discovered from the 1950s 098120773 Form No. 1010101 Page 4 / Total 24 Page 0982035400-0 201101552 After the strong thermoelectric effect, the new application of thermal I conversion materials is highly focused, for example in Power generation (thermal power politician), enthalpy (thermal effect inverse effect / Peltier effect) has a huge potential application value. Compared with traditional power generation and refrigeration equipment, the equipment made by the thermoelectric effect and its inverse effect has the means of taking the device, the equipment is simple, no noise (no mechanical transmission), no pollution (no liquid or gaseous working medium) such as Freon ) and many other advantages. However, the thermoelectric conversion material made of a metal material has a large hardness and does not have flexibility, which limits the application of the thermoelectric conversion material.

[0005] In recent years, conductive polymers (polyacetylene, polyaniline, polymer, polythiophene, etc.) have been gradually studied in the field of thermoelectricity. Their advantages are both good electrical conductivity and low thermal conductivity, low cost of assembly, light weight and flexibility. However, when it is actually applied to a thermoelectric conversion material, thermoelectric conversion of a thermoelectric conversion material based on a conductive polymer remains to be further [invention]

In view of this, it is necessary to provide a flexible and thermoelectric conversion material. Heat with High Conversion Efficiency [0007] A thermoelectric conversion material comprising a ~zomi* tube structure and a conductive polymer layer. The carbon nanotube structure includes a plurality of carbon nanotubes, wherein the conductive polymer layer is coated on the nanosphere [0008], and the thermoelectric conversion material comprises a plurality of one-dimensional nanocarbons. The tube composite structure is interconnected by the van der Waals force. The one-dimensional 098120773 carbon nanotube composite structure includes one less carbon nanotube and one person form number A0101. 5萸/24 pages^ 0982035400-0 201101552 [0009] [0012] [0012] 098120773 The layer is coated on the surface of the carbon nanotube. A thermoelectric conversion material comprising a plurality of one-dimensional carbon nanotube composite structures interconnected by a van der Waals force, the one-dimensional carbon nanotube composite structure comprising a one-dimensional conductive polymer material and at least A carbon nanotube is composited inside the one-dimensional conductive polymer. In comparison with the prior art, the thermoelectric conversion material is coated with a conductive polymer on the surface of a carbon nanotube in the carbon nanotube structure to form a conductive polymer layer on the surface of the carbon nanotube. Since the carbon nanotube structure itself has good flexibility and self-supporting properties, the thermoelectric conversion material having a carbon nanotube structure as a skeleton has good flexibility. In addition, since the conductive polymer layer is composited to the carbon nanotube structure in the form of a surface coated on the surface of the carbon nanotube, the thermoelectric conversion material has a larger Seebeck coefficient, and thus the thermoelectricity of the thermoelectric conversion material The conversion efficiency is high. [Embodiment] Hereinafter, a thermoelectric conversion material according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Referring to FIG. 1, a first embodiment of the present invention provides a thermoelectric conversion material 10 including a nano tube structure 16 and a conductive Polymer layer 14. The carbon nanotube structure 16 is formed by interconnecting a plurality of carbon nanotubes 12. Adjacent carbon nanotubes 12 are connected to each other by van der Waals force. In the thermoelectric conversion material 10, the carbon nanotube structure 16 serves as a skeleton, and the conductive polymer layer 14 covers the surface of the carbon nanotube 12 in the carbon nanotube structure 16, that is, the The carbon nanotube structure 16 can support the conductive polymer layer 14 such that the conductive polymer layer 14 can be distributed on the surface of the carbon nanotube 12. In the present embodiment, the conductive polymer layer 14 is uniformly distributed on the entire surface of the carbon nanotube structure 16, that is, the nanometer, in the form number A0101, page 6 / page 24, 0982035400-0 201101552. The surface of each of the carbon nanotube structures 16 is uniformly distributed with a conductive polymer layer 14 on the surface of each of the carbon nanotubes 12. Additionally, the carbon nanotube structure 16 has a plurality of micropores 18. The micropores 18 are surrounded by a plurality of carbon nanotubes 12, and the inner surface of each of the micropores 18 is provided with the above conductive polymer layer 14. The size of the micropores ranges from 60 nm to 400 nm. Meter. Due to the presence of a plurality of micropores 18, the thermoelectric conversion material 10 has a small density and is light in weight. [0013] The carbon nanotube 12 includes one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The diameter of the single-walled carbon nanotube is preferably 0.5 nm to 50 nm, and the diameter of the double-walled carbon nanotube is preferably 1.0 nm to 50 nm, and the diameter of the multi-walled carbon nanotube is preferably 1.5 nm ~ 50 nm. The length of the carbon nanotubes is preferably between 100 nm and 10 mm. In this embodiment, the carbon nanotube structure 16 formed by the carbon nanotubes 12 is a disordered arrangement of carbon nanotube networks. By "disorder", it is meant that the arrangement of the carbon nanotubes 12 in the carbon nanotube structure 16 is irregular or isotropic. Devalli attracts each other and has a mesh structure. Preferably, the surface of the tube structure 16. The disordered array of carbon nanotubes 12 are intertwined and evenly distributed to form a carbon nanotube network 12 in which the carbon nanotubes 12 are substantially parallel to the carbon nanotubes [0014]. The structure includes a disordered arrangement of carbon nanotube paper prepared by a vacuum filtration method, and a carbon nanotube sheet formed by pressure flattening of a carbon nanotube powder of 15 MPa or more. In this embodiment, the carbon nanotube network structure is a disordered arrangement of carbon nanotube paper prepared by vacuum filtration. 098120773 Form No. A0101 Page 7 of 24 0982035400-0 201101552 [0015] [0018] [0018] 098120773 The silk fibroin layer U of the silk guiding compound layer U. Called, polyporphin 4 acetylene 'poly pair stupid and poly pairs of stupid buildings in the kind or a few. The thickness of the conductive polymer layer 14 is preferably between 3H15Q nanometers, and in this embodiment, 5 nanometers, nanometer. The conductive polymer layer is preferably in the range of 2% by weight to 8% by mass of the electric conversion material 10. In this embodiment, the electropolymer layer 14 is a polyaniline layer, and the conductive polymer layer 14 is coated on the surface of the disordered nanotube network. FIG. 2 is a thermoelectric conversion material of the present invention. Schematic diagram of the electric effect Becker coefficient measuring device 100. The thermoelectric effect Seebeck coefficient measuring device 1 包括 includes a low temperature end copper block! 〇2 and - high temperature end copper block 1〇3, the high temperature end copper block 103 is spaced apart from and opposite to the low temperature end copper block 102. The surface of the low temperature end copper block 102 opposite to the high temperature end copper block 103 is provided with a temperature measuring coupler 107, respectively. The low temperature end copper block 102 is cooled by a circulating water device 1〇4, and the high temperature end copper block 103 is heated by a constant current constant voltage source 1〇5. In order to facilitate measurement of the Seebeck coefficient of the above-described thermoelectric conversion material 1 ,, the above-described thermoelectric conversion material 10 is taught to be a two-even circular sheet. Each of the circular sheets preferably has a diameter of 13 mm and a thickness of preferably 55 μm. The mass is preferably 3.95 mg (mg). When measuring the Seebeck coefficient of the thermoelectric conversion material 10 described above, a circular sheet sample of the above thermoelectric conversion material 10 may be placed between the low temperature end copper block 102 and the high temperature end copper block 103, and the low temperature end is The copper block 1〇2 and the high temperature end steel block 103 are applied with a pressure such that the circular sheet samples of the thermoelectric conversion material 10 are in close contact with the low temperature end copper block 102 and the high temperature end copper block 103, respectively. The low temperature end copper block 102 and the circulating water device 104 are at a phase speed 'Form No. A0101, page 8 of 24, 0985 201101552 and are maintained at a low temperature of 17 degrees Celsius to 19 degrees Celsius by the circulating water device 104. The high temperature end copper block 10 3 is connected to the constant current constant voltage source 105, and is maintained at a high temperature of 47 degrees Celsius to 49 degrees Celsius by the constant current constant voltage source 105. The temperature difference between the two ends of the circular sheet sample is calculated from the thermocouple 107 reading

AT, and then connected to both ends of the circular sheet sample by a nanovoltmeter, the potential difference ΔΚ ❹ at both ends of the sample was measured [0019]. By formula:

S NFΔΓ [0020] [0021] The Seebeck coefficient of the sample was calculated. For comparison, this example also measured a sample of pure polyaniline sheet pressed from pure polyaniline powder by the same method, and the Seebeck coefficient of the carbon nanotube paper. Fig. 3 is a distribution diagram of the Seebeck coefficient of the thermoelectric conversion material 10 and the pure polyaniline sheet and the carbon nanotube paper under different pressures in the present embodiment. As can be seen from Fig. 3, the Seebeck coefficient of the thermoelectric conversion material 10 in the present embodiment is much larger than that of the pure polyaniline sheet and the carbon nanotube paper. It can be seen that the conductive polymer material is coated on the carbon nanotube 12 in the carbon nanotube structure 16 to form the conductive polymer layer 14, which can improve the Seebeck coefficient of the thermoelectric conversion material 10. [0022] Referring to FIG. 4, a second embodiment of the present invention provides a thermoelectric conversion material 20 098120773, Form No. A0101, page 9 / 24 pages 0982035400-0 201101552, and the thermoelectric conversion material 2 includes a carbon nanotube structure. 26 and - a conductive polymer layer 24. In the present embodiment, the thermoelectric conversion material 2 is similar in structure to the thermoelectric conversion material 10 of the first embodiment, except that the carbon nanotube structure 26 includes a plurality of ordered carbon nanotubes 22. The adjacent carbon nanotubes 22 are connected to each other by Van der Waals force. The "ordered arrangement" refers to the arrangement of the carbon nanotubes 22 in the carbon nanotube structure 26 < Specifically, the carbon nanotubes 2 in the ordered carbon nanotube structure 26 are arranged in a preferred orientation in one direction or in a plurality of directions. The conductive polymer layer 24 is coated on the carbon nanotubes 22 The surface, i.e., the surface of the carbon nanotube structure 26, provides support to the conductive polymer layer 24. The thermoelectric conversion material 20 further includes a plurality of micropores 28, and the micropores 28 are formed by a plurality of nanotubes 22, and the inner surface of each of the micropores 28 is provided with the above conductive polymer layer. twenty four. The micropores 28 range in size from 50 nanometers to 500 nanometers. Due to the presence of the plurality of micropores 28, the thermoelectric conversion material 20 has a small density and is light in weight. [0023] Specifically, the conductive polymer layer The material of 24 includes one or more of polyaniline, polyoxan, polyseptene, polyacetylene, polyparaphenylene, and poly(p-ethylene). The thickness of the conductive polymer layer 24 is preferably between 3 nanometers and 120 nanometers. The conductive polymer layer 24 has a thickness ranging from 35 nm to 145 nm. The mass percentage of the conductive polymer layer 24 in the thermoelectric conversion material 20 is preferably from 20% to 80%. [0024] The ordered carbon nanotube structure 26 includes a nano carbon tube film obtained by directly stretching a carbon nanotube array, and a nano tube obtained by rolling a carbon nanotube array by a rolling method. Carbon tube rolled film. 098120773 Form No. A0101 Page 1 of 24 0982035400-0

201101552 L0025J ❹ The carbon nanotube film comprises a plurality of carbon nanotubes which are substantially parallel and substantially parallel to the surface of the carbon nanotube film. Specifically, the plurality of carbon nanotubes are connected end to end by Van der Waals force and are arranged in a preferred orientation in substantially the same direction. The ordered arrangement of carbon nanotube structures 26 may further comprise at least two stacked carbon nanotube membranes. The carbon nanotubes in the adjacent two carbon nanotube films are arranged in the same direction or in different directions. Specifically, the carbon nanotubes in the adjacent two carbon nanotube films have an intersection angle. α, and 0 α 90 °, can be prepared according to actual needs. It can be understood that, since the carbon nanotube film in the ordered arrangement of the carbon nanotube structure 26 can be stacked, the thickness of the above-mentioned ordered carbon nanotube structure 26 is not limited, and can be made according to actual needs. An ordered arrangement of carbon nanotube structures 26 of any thickness. [0026] The carbon nanotube rolled film comprises uniformly distributed carbon nanotubes, and the carbon nanotubes are isotropically arranged in the same direction or in different directions. Preferably, the carbon nanotubes in the carbon nanotube rolled film are parallel to the surface of the carbon nanotube film. The carbon nanotubes in the carbon nanotube rolled film overlap each other. The carbon nanotubes in the carbon nanotube film are attracted to each other by van der Waals force, and the carbon nanotubes have good flexibility and can be bent and folded into any shape. Does not break. And because the carbon nanotubes in the carbon nanotube film are attracted to each other through the van der Waals force, the carbon nanotube film is a self-supporting structure, which can be self-supported without substrate support. presence. The carbon nanotube rolled film can be obtained by rolling an array of carbon nanotubes. The carbon nanotubes in the carbon nanotube rolled film form an angle α with the surface of the substrate forming the carbon nanotube array, wherein α is greater than or equal to 0 degrees and less than or equal to 15 degrees (0 098120773 Form No. Α 0101 11 pages/24 pages 0982035400-0 201101552 α I5 ), the angle α is related to the pressure applied to the carbon nanotube array, and the larger the pressure, the smaller the angle. The length and width of the carbon nanotube rolled film are not limited. In this embodiment, the ordered nanocarbon S structure 26 is formed by parallel stacking of a plurality of layers of carbon nanotubes. [0029] [0029] 098120773 As shown in FIG. 4, in the thermoelectric conversion material 2 of the present embodiment, the nano carbon s, "° structure 26 includes a plurality of first and last ends connected in a substantially optimal orientation in the same direction. Arranged carbon nanotubes 22. Fig. 4 shows only a part of the structure of the thermoelectric conversion material 2', wherein the broken line represents a carbon nanotube 22. • Referring to Fig. 5, a third embodiment of the present invention provides a thermoelectric conversion material 3. The thermoelectric conversion material 30 includes a carbon nanotube structure 36 and a conductive polymer layer 34. In this embodiment, the thermoelectric conversion material 2 is similar in structure to the thermoelectric conversion material 10 of the first embodiment and the thermoelectric conversion material 2 of the second embodiment, except that the carbon nanotube structure 3 is a nanometer. Carbon tube array. It comprises a plurality of carbon nanotubes 32, said plurality of carbon nanotubes 32 being substantially parallel to each other, and said plurality of carbon nanotubes 32 having substantially the same length. The conductive polymeric positive layer 34 is coated on the surface of the carbon nanotube 32 in the carbon nanotube structure 36. The plurality of micropores 38 are further included in the carbon nanotube structure 36. These micropores 38 are surrounded by a plurality of carbon nanotubes 32, and the inner surface of each of the micropores 38 is provided with the above-mentioned conductive polymer layer 34. The size of the micropores ranges from 1 nanometer to 5 nanometers. Due to the presence of a plurality of micropores 38, the thermoelectric conversion material 3 has a small density and is light in weight. The conductive polymer layer 34 includes one or more of polyaniline, polypyrrole, polythiophene, polyacetylene, polypyrene, and poly(p-vinyl). In this embodiment, the thickness of the conductive polymer layer 34 is preferably between 3 nm and 12 Å. Form No. A0101 Page 12 / Total 24 pages _ 201101552 〇 [0031] Between the nanoparticles. The mass percentage of the conductive polymer layer 34 in the thermoelectric conversion material 3 is preferably from 20% to 80%. [0030] The carbon nanotubes 32 include one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The diameter of the single-walled carbon nanotube is preferably 0.5 nm to 50 nm, and the diameter of the double-walled carbon nanotube is preferably 1. The diameter of the multi-walled carbon nanotube is preferably 1. 1.5 nm ~ 50 nm. The length of the carbon nanotube 32 is preferably between 100 nm and 1 mm. Fig. 6 is a distribution diagram of the Seebeck coefficient of the thermoelectric conversion material 3〇 and the polyaniline sheet and the carbon nanotube array at different pressures in the present embodiment. As can be seen from Fig. 6, the Seebeck coefficient of the thermoelectric conversion material 30 in the present embodiment is much larger than that of the pure polyaniline sheet and the nanotube array. Thus, it can be seen that the conductive polymer material is coated on the carbon nanotube 32 to form the conductive polymer material layer 34, which can improve the Sebec coefficient of the thermoelectric conversion material 3〇. The thermoelectric conversion material of the embodiment of the invention adopts a nano tube structure as a skeleton, and a conductive polymer layer is formed on the surface of the carbon nanotube in the carbon nanotube structure. On the one hand, the conductive polymer material can be uniformly distributed in the entire thermoelectric conversion material in a one-dimensional form, and the one-dimensional structure has a souther density of states at the Fermi level, so the thermoelectric conversion material has more Good thermoelectric conversion efficiency. On the other hand, when the thermoelectric conversion material of the embodiment of the present invention is applied, when the carrier is transported from a carbon nanotube coated with a conductive polymer layer to another carbon nanotube coated with the conductive polymer layer, The child will pass through the nano-destructive/polyamine interface and a thin layer of polyamidamine. A large number of carriers clustered on the carbon nanotube/polyamine interface will transport along the thickness direction of the thermoelectric conversion material 098120773 Form No. A0101 Page 13 / Total 24 page 0982035400-0 201101552 'Energy is higher than the formed quantum The barrier of the scale passes through the barrier when the carrier is passed, and the carrier with lower energy cannot pass through the barrier. The increase in the energy of the carrier increases the average energy of the carrier in the carrier stream, thereby increasing the Seebeck coefficient of the thermoelectric conversion material. Therefore, the thermoelectric conversion efficiency of the thermoelectric conversion material of the embodiment of the invention is relatively high. In addition, since the carbon nanotube structure itself has good flexibility and self-supporting property, the thermoelectric conversion material having a carbon nanotube structure as a skeleton has better flexibility. [0033] In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art will be encompassed within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0034] Fig. 1 is a schematic view showing the structure of a thermoelectric conversion material containing a disordered carbon nanotube according to a first embodiment of the present invention. 2 is a schematic view showing a thermoelectric effect Seebeck coefficient measuring device of the thermoelectric conversion powder of the present invention. 3 is a Seebeck coefficient distribution diagram of a thermoelectric conversion material, a pure carbon nanotube, and a conductive polymer according to a first embodiment of the present invention at different pressures. [0036] FIG. 4 is a schematic structural view of a thermoelectric conversion material containing ordered carbon nanotubes according to a second embodiment of the present invention. 5 is a schematic view showing the structure of a thermoelectric conversion material including a carbon nanotube array according to a third embodiment of the present invention. 098120773 Form No. A0101 No. 14 1/24 pages 0992035400-0 201101552 [0039] FIG. 6 is a distribution of Seebeck coefficient of a thermoelectric conversion material, a pure carbon nanotube and a conductive polymer under different pressures according to a third embodiment of the present invention. Figure. [Main component symbol description] Thermoelectric conversion material 10, 20, 30 Carbon nanotube structure 16, 26, 36 Carbon nanotube 12, 22, 32 Conductive polymer layer 14, 24, 34 Microporous 18, 28, 38 Thermoelectric Effect Seebeck coefficient measuring device 100 low temperature end copper block 102 south temperature end copper block 103: love 'genus iron 1 ^ '1 piano": learning circulating water device 104 constant current constant voltage source 105 temperature measuring couple 107

098120773 Form No. A0101 Page 15 of 24 0982035400-0

Claims (1)

201101552 VII. Patent application scope: 1. A thermoelectric conversion material, wherein the thermoelectric conversion material comprises a carbon nanotube structure and a conductive polymer layer, and the carbon nanotube structure comprises a plurality of carbon nanotubes The conductive polymer layer is coated on the surface of the carbon nanotube. The thermoelectric conversion material according to claim 1, wherein the carbon nanotube structure serves as a skeleton to support the conductive polymer layer. 3. The thermoelectric conversion material according to claim 1, wherein the plurality of carbon nanotubes are connected to each other to form a network structure. 4. The thermoelectric conversion material according to claim 1, wherein the carbon nanotube structure further comprises a plurality of micropores, each of which is surrounded by a plurality of carbon nanotubes and each The inner surface of the micropores is provided with the above conductive polymer layer. 5. The thermoelectric conversion material according to claim 4, wherein the micropores have a size of from 50 nm to 500 nm. 6. The thermoelectric conversion material according to claim 1, wherein the carbon nanotubes in the carbon nanotube structure are disorderly arranged. 7. The thermoelectric conversion material according to claim 6, wherein the disorderly arranged carbon nanotubes are mutually attracted by the van der Waals force, intertwined, and uniformly distributed in the carbon nanotube structure. 8. The thermoelectric conversion material according to claim 1, wherein the carbon nanotubes in the carbon nanotube structure are arranged in an orderly manner. 9. The thermoelectric conversion material according to claim 8, wherein the ordered carbon nanotubes are arranged in a preferred orientation in one direction or in a plurality of directions. 098120773 Form No. A0101 Page 16 / Total 24 Page 0992035400-0 201101552 ιυ . 11 . 12 . Ο 13 . 14 . 15 . 16 . ❹ 17 . 18 . 098120773 Form No. A0101 Page 17 of 24 If you apply for a patent The thermoelectric conversion material according to Item 8, wherein the carbon nanotube structure comprises at least one carbon nanotube film, the carbon nanotube film comprising a plurality of carbon nanotubes substantially parallel to each other and substantially parallel to the nanometer Carbon film surface. The thermoelectric conversion material according to claim 10, wherein the carbon nanotubes in the carbon nanotube film are connected end to end by a van der Waals force and are arranged in a preferred orientation along a fixed direction. The thermoelectric conversion material according to claim 8, wherein the I# carbon tube structure comprises at least two laminated carbon nanotube films. The thermoelectric conversion material according to claim 1, wherein the carbon nanotube structure is a carbon nanotube array. The thermoelectric conversion material according to claim 1, wherein the conductive polymer layer has a thickness ranging from 30 nm to 150 nm. The thermoelectric conversion material according to claim 1, wherein the conductive polymer layer is uniformly distributed on the surface of each of the carbon nanotubes in the carbon nanotube structure. The thermoelectric conversion material according to claim 1, wherein the conductive polymer material is uniformly distributed in the thermoelectric conversion material in a one-dimensional form. The thermoelectric conversion material according to any one of claims 1 to 16, wherein the material of the conductive polymer layer is polyaniline, polypyrrol, polythiophene, polyacetylene, polypyrene, and poly An improvement of one or several thermoelectric conversion materials in p-phenylene ethylene, wherein the thermoelectric conversion material comprises a plurality of one-dimensional carbon nanotube composite structures interconnected by van der Waals force 'the one-dimensional nanometer The carbon tube composite structure includes at least one carbon nanotube and a conductive polymer layer of 0982035400-0 201101552 coated on the surface of the carbon nanotube. A thermoelectric conversion material, characterized in that the thermoelectric conversion material comprises a plurality of one-dimensional carbon nanotube composite structures interconnected by a van der Waals force, the one-dimensional carbon nanotube composite structure including a one-dimensional A conductive polymer material and at least one carbon nanotube are composited inside the one-dimensional conductive polymer. 098120773 Form No. A0101 Page 18 of 24 0982035400-0