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Graphite paper-barium titanate/polymide integrated composite thin-film capacitor

A composite film and polyimide technology, applied in the field of energy storage, can solve the problems of not being able to achieve the advantages of organic plastic film thickness, limit the application of new capacitors, reduce film thickness, etc., and achieve reduced production costs, low energy consumption and cost, The effect of increasing the capacity

Active Publication Date: 2014-09-10
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the published graphite paper-barium titanate supercapacitor, the use of graphite paper as an electrode can effectively reduce the thickness of the film, but it still cannot achieve the thickness advantages of organic plastic films.
In addition, a single ceramic barium titanate film capacitor needs a high-temperature sintering process to improve the interaction force between particles, and the sintering temperature is above 1100°C, which has high requirements for equipment and operating environment, and high energy consumption, which is difficult to large Area preparation, which will limit the application of new capacitors

Method used

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  • Graphite paper-barium titanate/polymide integrated composite thin-film capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, an integrated composite film capacitor containing a monolithic double-layer dielectric layer is selected.

[0028] Concrete preparation method is as follows:

[0029] The first step: pretreatment process: first add barium titanate powder into absolute ethanol with a mass fraction of 95%, ultrasonically disperse for 1 hour, centrifuge, wash, dry, and set aside; press the cut graphite paper electrode Press it until it is flat, wipe it with absolute ethanol and dry it for later use.

[0030] Step 2: Preparation of coating film: under nitrogen protection, add 5.008 g of 4,4'-diaminodiphenyl ether (4,4'-ODA) to 100 mL of N,N-dimethylacetamide (DMAc), after stirring to dissolve completely, add 5.453 g of pyromellitic dianhydride (PMDA), and stir vigorously for 4 hours to prepare a polyamic acid solution with a solid content of 10%, then take 30 g of the above solution, and add 12.63 g The barium titanate after ultrasonic dispersion was stirred for 24 hou...

Embodiment 2

[0036] In this example, an integrated composite film capacitor containing two layers of three dielectric layers is selected.

[0037] Concrete preparation method is as follows:

[0038] The first step: pretreatment process: first add barium titanate powder into absolute ethanol with a mass fraction of 95%, ultrasonically disperse for 1 hour, centrifuge, wash, dry, and set aside; press the cut graphite paper electrode Press it until it is flat, wipe it with absolute ethanol and dry it for later use.

[0039]Step 2: Preparation of coating film: under nitrogen protection, add 5.008 g of 4,4'-diaminodiphenyl ether (4,4'-ODA) to 100 mL of N,N-dimethylacetamide (DMAc), after stirring to dissolve completely, add 5.453 g of pyromellitic dianhydride (PMDA), and stir vigorously for 4 hours to prepare a polyamic acid solution with a solid content of 10%, then take 30 g of the above solution, and add 12.63 g The barium titanate after ultrasonic dispersion was stirred for 24 hours to obt...

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Abstract

The invention relates to a graphite paper-barium titanate / polymide integrated composite thin-film capacitor. The graphite paper-barium titanate / polymide integrated composite thin-film capacitor comprises one or more layers of graphite-paper inner electrodes, dielectric layers among the inner electrodes and end electrodes at two ends. The graphite-paper-barium titanate / polymide integrated composite thin-film capacitor is characterized in that tatanate / polymide composite films are used as the dielectric layers, and the dielectric layers are integrally manufactured by graphite paper as carriers by means of the Czochralski method; the polymide is used as shell packing materials. The graphite-paper-barium titanate / polymide films are made by the Czochralski method, and solvent is removed and air microbubbles easy to cause breakdown are eliminated by reaction of vacuum heat imidization, so that dielectric constant is increased and the graphite paper-barium titanate / polymide integrated composite thin-film capacitor high in dielectric performance is manufactured. The manufactured thin-film capacitor has higher thermal stability, small thickness, high dielectric constant and low dielectric loss, energy loss caused by high-temperature sintering is avoided, and large-area manufacturing is realized.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a graphite paper-barium titanate / polyimide integrated composite film capacitor and a method for preparing the capacitor. Background technique [0002] As a general-purpose capacitor, chip capacitors have the advantages of good product performance and high reliability compared with other capacitors. It uses the dielectric layer and the electrode layer to be stacked alternately to form a layered structure, and then connects the electrodes at both ends of each monolithic capacitor through the terminal electrodes to form a parallel connection of monolithic film capacitors, and finally seals it. [0003] At present, the research focus of chip capacitors is to design a new material system for the dielectric layer film to increase the dielectric constant of the dielectric layer, reduce the thickness of the dielectric layer, and increase the number of dielectric layers; effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/33C08G73/10C09D179/08C09D7/12B05D7/24B05D1/18
Inventor 王玮初蕾朱志斌董娇孙峰孙明亮郭静静朱永波
Owner OCEAN UNIV OF CHINA
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