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Preparation method of capacitor ultrathin film

A capacitor and ultra-thin film technology, applied in the field of nanoscale polymer film preparation, can solve the problems of large film thickness, etc., and achieve the effects of high film strength, controllable structure, and simple film making method

Active Publication Date: 2013-02-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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But the thicker film

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  • Preparation method of capacitor ultrathin film
  • Preparation method of capacitor ultrathin film

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Embodiment 1

[0026] 0.03g poly(styrene-b-vinylpyridine) (70% styrene volume fraction) and 9.97g solvent toluene were placed in a volumetric flask to prepare a film solution with a block copolymer concentration of 0.3wt%. After complete mixing, stand still for 24 hours. The surface of the electrode was spin-coated to form a film (1000 revolutions per minute), and dried in vacuum for 12 hours to obtain a copolymer film with a thickness of 30 nm.

Embodiment 2

[0028] 0.5g poly(styrene-b-acrylic acid) (50% styrene volume fraction) and 9.5g solvent toluene were placed in a volumetric flask to prepare a film solution with a block copolymer concentration of 5wt%. After complete mixing, stand still for 24 hours. The electrode surface was spin-coated to form a film (3000 revolutions per minute), and dried in vacuum for 12 hours to obtain a copolymer film with a thickness of 180 nm.

Embodiment 3

[0030] Mix 0.9g poly(styrene-b-methyl methacrylate) with 0.1g polymethyl methacrylate (75% styrene volume fraction) and 9g solvent toluene in a volumetric flask to prepare the polymer concentration 10 wt% membrane liquid. After complete mixing, stand still for 24 hours. The surface of the electrode was spin-coated to form a film (rotating speed of 4000 rpm), and dried in vacuum for 12 hours to obtain a copolymer film with a thickness of 330 nm.

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Abstract

The invention discloses a preparation method of a capacitor ultrathin film. The preparation method of the capacitor ultrathin film is characterized by comprising the steps of: dissolving a segmented copolymer containing polystyrene segments by utilizing solvents such as toluene; and coating on a smooth electrode surface in a spinning mode by utilizing a spin coating method to form a film, wherein the surface of the film is even and compact, the internal structure of the film is put in order, the film thickness is uniform and has no defect, and is 10-500nanometers. According to the preparation method of the film, the polymer film with the nano-level thickness is obtained, the defect that the film of the existing film capacitor is high in thickness is overcome, and the preparation method has the advantages of simple preparation process, nano-level film thickness, easiness in industrial amplification, high accuracy, high stability and the like.

Description

field of invention [0001] The invention relates to the field of preparation of nanoscale polymer films, in particular to a method for preparing ultra-thin polymer films for capacitors. Background technique [0002] With the development of power electronics technology, the demand for DC large-capacity capacitors in various power conversions, AC drives, and energy storage power supplies continues to increase. Due to the many shortcomings of aluminum electrolytic capacitors in terms of performance, reliability, and life, metallization The trend of film capacitors replacing aluminum electrolytic capacitors is becoming more and more obvious. Especially in the field of energy saving and new energy, metallized film capacitors play a huge role. [0003] Plastic film is used as the dielectric of capacitors, and polyester film, polycarbonate film, and polystyrene film, which were originally used in electronic equipment, entered practical use in the form of replacing paper media. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/14H01G9/02
Inventor 刘帅王丽华吴杰刘必前
Owner INST OF CHEM CHINESE ACAD OF SCI
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