A kind of preparation method of dielectric material for high energy storage capacitor

Abstract

The invention discloses a preparation method of a dielectric material for a high energy storage capacitor, the invention relates to the technical field of dielectric materials, the preparation methoduses polyaniline coated with inorganic nanoparticles as a filler, polyvinylidene fluoride as polymer matrix, metal Ni as the load. Firstly, the surface of inorganic nanoparticles is modified by physical ball milling and chemical surfactant, a supercritical fluid reaction is adopted to coat polyaniline on the surface of the inorganic nanoparticles, so that a composite fill is prepared, the composite fill and the polyvinylidene fluoride are spun into a fibrous membrane by melt electrospinning, at last, the metal Ni load and the polyvinylidene fluoride are composited on the fiber membrane by magnetron sputter, the load of the metal Ni not only helps to fill the high porosity of the electrospun fiber film, but also helps to maintain high breakdown field strength, high energy storage density, high dielectric constant and low dielectric loss of the dielectric material, and the composite dielectric material has high energy storage performance.

Description

technical field [0001] The invention belongs to the technical field of dielectric materials, relates to the technical field of dielectric materials for high energy storage capacitors, and in particular to a preparation method of dielectric materials for high energy storage capacitors. Background technique [0002] Dielectric materials store energy in the form of electrostatics and have important applications in the information, electronics and power industries. With the rapid development of the electronics industry, the development and application of polymer matrix composites with high dielectric constant, low dielectric loss, low cost and easy processing has attracted more and more attention. In the field of electrical engineering, such polymer-based composite materials can be used as dielectric materials for capacitors with high energy storage density; in the field of microelectronics, high-capacitance embedded microcapacitors can be prepared on a large scale by selecting ...

AI Technical Summary

Problems solved by technology

Metal ions have good conductivity. Adding a small amount of conductive particles to polymer dielectric materials can effectively improve its dielectric properties. Carbon material particles have high conductivity, and a low dosage can greatly increase the dielectric constant of the polymer. , but whether it is inorganic ceramic materials, metal particles or carbon material particles, there is a shortcoming that they are easy to agglomerate in the matrix. Therefore, improving the compatibility between fillers and polymers is the current research focus of polymer-based dielectric materials.