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Preparation method for composite thermoelectric film with flexible reduced graphene oxide and tellurium nano wires

A technology of tellurium nanowires and thermoelectric thin films, applied in the field of new energy materials, can solve the problems of no effective matching of composite components, narrow applicable temperature range, low Seebeck coefficient, etc., achieve broad industrial application prospects, optimize electrical conductivity and Effect of Seebeck coefficient and short production cycle

Inactive Publication Date: 2016-06-01
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, composite thermoelectric materials based on reduced graphene are all bulk materials composed of conductive polymers or inorganic semiconductors and reduced graphene, which have not achieved effective matching of composite components, and have low Seebeck coefficients. The applicable temperature range is narrow, and there are no shortcomings such as flexibility

Method used

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  • Preparation method for composite thermoelectric film with flexible reduced graphene oxide and tellurium nano wires
  • Preparation method for composite thermoelectric film with flexible reduced graphene oxide and tellurium nano wires
  • Preparation method for composite thermoelectric film with flexible reduced graphene oxide and tellurium nano wires

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Experimental program
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Effect test

Embodiment 1

[0031] like figure 1 As shown, a preparation method of a flexible reduced graphene / tellurium nanowire composite thermoelectric film, which comprises the following steps:

[0032] (1) ultrasonically disperse 25 mg of graphene oxide (GO) and 12.5 mg of sodium polystyrene sulfonate (NaPSS) in 12.5 mL of deionized water, then add 25 mL of saturated hydrobromic acid solution to the dispersion, and transfer the mixture In a 50mL reactor, hydrothermally react at 120°C for 2 hours and then naturally cool to obtain a precipitate; after washing the precipitate with deionized water for 3-5 times, vacuum-dry the precipitate at 60°C for 3 hours to obtain dispersible reduced graphene. Scanning electron microscope pictures of dispersible reduced graphene such as figure 2 shown;

[0033] (2) 0.369g of sodium tellurite and 2g of polyvinylpyrrolidone were stirred and dissolved in 70mL of deionized water, then 6.6mL of 25% ammonia water and 3.4mL of 98% hydrazine hydrate were added to the sol...

Embodiment 2

[0037] (1) Disperse 25mg graphene oxide (GO) and 50mg sodium polystyrene sulfonate (NaPSS) ultrasonically in 12.5mL deionized water, then add 50mL saturated hydrobromic acid solution to the dispersion, and transfer the mixture to In a 100mL reactor, hydrothermally react at 150°C for 2 hours and then naturally cool to obtain a precipitate; after washing the precipitate with deionized water for 3-5 times, vacuum-dry the precipitate at 60°C for 3 hours to obtain dispersible reduced graphene;

[0038] (2) 0.369g of sodium tellurite and 2g of polyvinylpyrrolidone were stirred and dissolved in 70mL of deionized water, then 6.6mL of 25% ammonia water and 3.4mL of 98% hydrazine hydrate were added to the solution, and the mixed solution was transferred to a 100mL reactor After the hydrothermal reaction was carried out at 180°C for 1.5 hours, the reactor was cooled with flowing tap water; after adding 320 mL of acetone to the cooled mixture, the mixture was centrifuged and the supernatan...

Embodiment 3

[0042](1) ultrasonically disperse 25 mg of graphene oxide (GO) and 25 mg of sodium polystyrene sulfonate (NaPSS) in 12.5 mL of deionized water, then add 25 mL of saturated hydrobromic acid solution to the dispersion, and transfer the mixture to In a 50mL reactor, hydrothermally react at 120°C for 2 hours and then naturally cool to obtain a precipitate; after washing the precipitate with deionized water for 3-5 times, vacuum-dry the precipitate at 60°C for 3 hours to obtain dispersible reduced graphene;

[0043] (2) 0.369g of sodium tellurite and 2g of polyvinylpyrrolidone were stirred and dissolved in 70mL of deionized water, then 6.6mL of 25% ammonia water and 3.4mL of 98% hydrazine hydrate were added to the solution, and the mixed solution was transferred to a 100mL reactor After the hydrothermal reaction was carried out at 180 °C for 3 hours, the reaction kettle was cooled with flowing tap water; after adding 160 mL of acetone to the cooled mixture, the mixture was centrifug...

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Abstract

The invention relates to a preparation method for a composite thermoelectric film with flexible reduced graphene oxide (RGO)and tellurium nano wires (Te NWs). The preparation method comprises: reducing preparation is carried out by using oxidized graphene (GO) powder and sodium polystyrene sulfonate (NaPSS) as raw materials according to a hydrothermal method to obtain RGO that can be dispersed in water; reducing preparation is carried out by using sodium tellurite (Na2TeO3) as a raw material and hydrazine hydrate (N2H4.H2O) as a reducing agent according to a hydrothermal method to obtain TeNWs that can be dispersed in watewr; after a certain number of RGO and Na2TeO3 materials are dispersed in water ultrasonically, RGO dispersion liquid and Te NWs dispersion liquid drip on a flexible glass fiber film successively with assistance of vacuum filtration and the glass fiber film is dried in a vacuum environment; annealing is carried out on the glass fiber covered with a composite film at a mixed atmosphere of Ar and H2 under the temperature of 200 DEG C for some time to obtain a composite thermoelectric film with the RGO and Te NWs. The provided preparation method has characteristics of simple and easily controlled process, short reaction time, low energy consumption, high security, good pollution-free performance, and excellent flexible film thermoelectric property and the like.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a preparation method of a composite thermoelectric thin film of flexible reduced graphene and tellurium nanowires. Background technique [0002] Thermoelectric materials are materials that can realize the direct mutual conversion of thermal energy and electrical energy. Thermoelectric power generation devices and refrigeration devices based on thermoelectric materials have the characteristics of compact structure, no noise, no pollution, and recyclability of waste energy. , aerospace, microelectronics and even household appliances and other fields have broad application prospects. Compared with commercial bulk thermoelectric materials, flexible thermoelectric materials have unique advantages such as bendability, low preparation cost, simple process, and wide application range. In recent years, they have attracted more and more attention from the scientifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H10N10/01
CPCH10N10/01
Inventor 苗蕾高杰刘呈燕王潇漾彭英
Owner GUILIN UNIV OF ELECTRONIC TECH
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