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N-type thermoelectric material compounded by perylene bisimide or naphthalimide and carbon nano tubes and preparation method of n-type thermoelectric material

A carbon nanotube composite and nanocomposite technology, applied in the field of n-type nanocomposite thermoelectric materials and their preparation, can solve the problems of low electrical conductivity and achieve the effects of good film-forming properties, high performance properties, and high electrical conductivity

Inactive Publication Date: 2016-12-14
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Recently, people have made progress in using n-type conductive polymers as thermoelectric materials. The Seebeck coefficient of some n-type conductive polymers is outstanding and can reach -600 μV K -1 , but the disadvantage is that the conductivity is too low, less than 1 S cm -1

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Put 0.74 g ND or PD, 14.1 g imidazole, and 1 g N,N-diethylethylenediamine in a 50 mL round bottom flask, heat to 130 °C, and reflux for 2 h under nitrogen atmosphere;

[0030] (2) After the reaction is complete, cool down to room temperature, suspend in methanol, filter with suction, and wash with methanol;

[0031] (3) vacuum-dry the product obtained by suction filtration to obtain NDIN and PDIN;

[0032] (4) Add 10 mg of NDIN or PDIN small organic molecules and 10 mg of carbon nanotubes to 15 mL of DMSO solvent, and use a probe ultrasonic instrument to ultrasonically disperse for 30 min;

[0033] (5) The mixture in step (4) was ultrasonically dispersed in a water bath ultrasonicator for 3 h;

[0034] (6) vacuum filter the reaction mixture obtained in step (5) to obtain a black filter membrane;

[0035] (7) Put the black filter membrane obtained in step (6) into a vacuum oven and dry at 50°C for 4 h to obtain n-type nanocomposite thermoelectric material NDIN-SWCN...

Embodiment 2

[0037] According to the method and steps described in Example 1, only the DMSO solvent in step (4) was replaced with ethanol. The Seebeck coefficients of the obtained NDIN-SWCNT film samples were 400±10 S cm -1 , the Seebeck coefficient is -46±0.8μV K -1 , PF value is 85±2μW m -1 K -2 . The electrical conductivity of the PDIN-SWCNT composite thermoelectric material film is 310±7 Scm -1 , Seebeck coefficient is -45±0.5 μV K -1 , PF value is 63±3μW m -1 K -2 .

Embodiment 3

[0039] According to the method and steps described in Example 1, just change the DMSO solvent in step (4) to toluene. The Seebeck coefficients of the obtained NDIN-SWCNT film samples were 410±9 S cm -1 , the Seebeck coefficient is -54±0.8 μV K -1 , PF value is 120±8μW m -1 K -2 . The electrical conductivity of the PDIN-SWCNT composite thermoelectric material film is 320±6 S cm -1 , Seebeck coefficient is -45±0.7 μV K -1 , PF value is 63±5μW m -1 K -2 .

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Abstract

The invention relates to an n-type thermoelectric material compounded by 3,4,9,10-perylene imide (PDIN) or 1,4,5,8-naphthaline imide (NDIN) and carbon nano tubes, and a preparation method of the n-type thermoelectric material, in particular to a method of synthesizing PDIN or NDIN micromolecules with n-type conduction property by taking 3,4,9,10-perylene tetra-formic anhydride (PD) or 1,4,5,8-naphthaline tetra-formic anhydride (ND) as raw materials, and then compounding with single-walled carbon nanotubes (SWCNT) to prepare the n-type thermoelectric material. The n-type compounded thermoelectric material is an n-type thermoelectric material efficiently prepared by taking the cheap and easy-to-get p-type carbon nanotubes as a raw material, taking DMSO as a solvent, taking the NDIN or PDIN as a mixing body, and ultrasonically mixing at room temperature. The stable n-type thermoelectric material is formed by coating the surfaces of NDIN or PDIN crystals with the carbon nanotubes. The invention provides the high-performance n-type thermoelectric material, and also provides the new method for preparing the flexible and organic thermoelectric material with the advantages of simple and convenient preparation process, no toxicity and no need of aftertreatment.

Description

technical field [0001] The invention relates to an n-type nanocomposite thermoelectric material and a preparation method thereof, in particular to a kind of n-type nanocomposite thermoelectric material compounded with single-walled carbon nanotubes after grafting N,N-diethylethylenediamine with small molecule PD or ND Thermoelectric materials and methods for their preparation. Background technique [0002] Thermoelectric materials, as environmentally friendly energy conversion materials, have shown remarkable application prospects. [0003] For the performance of thermoelectric materials, the dimensionless thermoelectric figure of merit ZT = S 2 σT / κ for evaluation. Among them, S, σ, T and κ are Seebeck coefficient, electrical conductivity, absolute temperature and thermal conductivity, respectively. [0004] Organic thermoelectricity is only in its infancy, and a systematic understanding of the influence of morphology, chemistry, and electronic structure on the three mai...

Claims

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Application Information

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IPC IPC(8): H01L35/24H01L35/34
CPCH10N10/856H10N10/01
Inventor 陈光明武光宝高彩艳
Owner INST OF CHEM CHINESE ACAD OF SCI
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