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Polymer-based high energy storage density material and preparing method thereof

A high energy storage density, polymer technology, applied in the direction of fixed capacitor dielectric, fixed capacitor parts, etc., can solve the problems of composite material loss, leakage conduction increase, breakdown field strength decrease, etc., to achieve good surface modification, Low density, easy processing effect

Inactive Publication Date: 2008-12-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the loss and leakage conductance of the composite material also increase, which makes the breakdown field strength decrease significantly.

Method used

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  • Polymer-based high energy storage density material and preparing method thereof
  • Polymer-based high energy storage density material and preparing method thereof
  • Polymer-based high energy storage density material and preparing method thereof

Examples

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preparation example Construction

[0021] The invention relates to a polymer base high energy storage density material and a preparation method thereof. The preparation steps are as follows:

[0022] Step (1) Preparation of modified carbon nanotubes: with the method of in-situ inverse emulsion polymerization, the specific formula is to add 1.2 milliliters of pyrrole, 1.32 grams of ammonium persulfate and 6 grams of hexadecylbenzene to 2 milligrams of carbon nanotubes In a mixture of sodium sulfonate, and in an inert atmosphere of argon, under ultrasonic or stirring conditions, react at 0°C for 8 hours, and form a core-shell structure material with carbon nanotubes as the core and an organic layer as the shell after drying. The test results are as follows: figure 1 It is the Raman spectrogram of MWCNT@PPy described in step (1). It can be seen that there are characteristic peaks of MWCNT@PPy at 1577, 1346, 1047, and 982 wavenumbers.

[0023] figure 2 It is the X-ray photoelectron spectrum diagram of the modi...

Embodiment 1

[0029] Weigh 1 gram of polystyrene, and dissolve it in 10 ml of ethyl acetate solution with stirring. Then weigh 0.03 gram of the modified carbon nanotubes described in the above step (1) and join in 10ml ethyl acetate solution to carry out ultrasonic operation for 0.5 hour (using 800W power, ultrasonic 1min, intermittent 5s mode), then mix with poly Mix the ethyl acetate solution of styrene, and under the protection of argon, stir evenly at room temperature, cast to form a film, dry at room temperature, vacuum dry, and then place it in an environment with a temperature of 150 ° C and a pressure of 10 MPa for 20 minutes to form , and finally placed in a normal temperature and pressure environment for 20 minutes to set the shape, that is, a modified carbon nanotube / polystyrene composite material with high energy storage density (denoted as 0.03MWCNT@PPy / PS).

Embodiment 2

[0031] Weigh 1 gram of polystyrene, and dissolve it in 10 ml of ethyl acetate solution with stirring. Then weigh 0.06 gram of the modified carbon nanotubes described in the above step (1) and join in 15ml of ethyl acetate solution for 1.0 hour ultrasonic operation (800W power, ultrasonic 1min, intermittent 5s mode), and then mix with poly Mix the ethyl acetate solution of styrene, and under the protection of argon, stir evenly at room temperature, cast into a film, dry at room temperature, vacuum dry, and then place it in an environment with a temperature of 160 ° C and a pressure of 12.5 MPa for 20 minutes Molding, and finally placed in an environment of normal temperature and pressure for 20 minutes to set the shape, that is, a composite material with high energy storage density of modified carbon nanotubes / polystyrene (denoted as 0.06MWCNT@PPy / PS).

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Abstract

The invention discloses a polymer-based material with high density of energy storage and a preparation method thereof, pertaining to the technical field of the preparation of dielectric materials and energy storage materials. The polymer-based material with high density of energy storage comprises carbon nanotube materials and polymer matrix materials which are modified with organics by a chemical method in the proportions of 3 wt percent to 10 wt percent, and has the effects of good compatibility with the matrix, reduction in the leakage current density of the materials and dielectric loss and improvement of the dielectric constant and the breakdown field strength of the materials. The matrix material is polystyrene which is dissolved with ethyl acetate and then blended with modified carbon nanotube solution; the solution is then cast into a mould and the mould is formed by hot pressing and shaped by cold pressing. The polymer-based material with high density of energy storage of the invention is characterized by good insulation, low density, excellent toughness, low cost and easy processing, and can be applied to dielectric materials of electronic devices of information technologies, dielectric projects, electrostatic storage and capacitors.

Description

technical field [0001] The invention belongs to the technical field of preparation of dielectric materials and energy storage materials, in particular to a polymer-based material with high energy storage density and a preparation method thereof, in particular to a nanocomposite with high energy storage density containing modified carbon nanotubes The material has good insulation, low density, good flexibility, low cost and easy processing, and can be applied to information technology electronic devices, dielectric engineering, electrostatic energy storage and capacitor dielectric materials. Background technique [0002] The rapid development of information technology has made electronic devices move towards the direction of "micro, small and light", and the preparation of capacitors with high energy storage density will be one of the effective ways to reduce the volume, quality and cost of electronic devices. Polymer-based composites are highly regarded in modern electronics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K9/04C08J5/18H01G4/06B29C70/50
Inventor 南策文杨程林元华
Owner TSINGHUA UNIV
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