High-energy-storage-performance ceramic/polymer dielectric composite material and preparation method thereof

A technology of composite materials and polymers, applied in the field of high energy storage performance ceramic/polymer dielectric composite materials and their preparation, can solve problems such as limiting energy storage density, reducing material breakdown field strength, increasing agglomeration and generating holes , to achieve the effects of improving breakdown strength, slowing down dielectric constant mismatch, improving energy storage density and energy storage efficiency
CN112708228AActive Publication Date: 2021-04-27NANCHANG HANGKONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANCHANG HANGKONG UNIVERSITY
Publication Date
2021-04-27

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Abstract

The invention discloses a high-energy-storage-performance ceramic / polymer dielectric composite material and a preparation method of the ceramic / polymer dielectric composite material. The polymer-based composite material takes P (VDF-CTFE) as a base material and SiO2-coated Pb (Zr0.52Ti0.48)O3 powder with low dielectric constant, low loss and high insulation as a filler. According to the invention, the dielectric constant of the composite material is improved by using the Pb(Zr0.52Ti0.48)O3 ferroelectric ceramic filler with the quasi-isomorphic phase boundary, and the breakdown field intensity is improved by reducing the electric field intensity distortion between the filler and the matrix by using the SiO2 with the low dielectric constant. The breakdown field intensity of the composite material can be improved to 450 MV / m-491 MV / m, and the composite material can achieve 16.8 J / cm<3> energy storage density and 70% energy storage efficiency under the highest 491 MV / m external electric field intensity. Meanwhile, the invention also discloses a preparation method of the composite material. According to the invention, the polymer-based composite material with high energy storage density, high energy storage efficiency and high breakdown field strength can be obtained, and the composite material can be applied to the technical field of high-power pulses due to excellent dielectric energy storage characteristics.
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Description

technical field

[0001] The invention relates to the field of ceramic / polymer composite materials, in particular to a ceramic / polymer dielectric composite material with high energy storage performance and a preparation method thereof. Background technique

[0002] Dielectric energy storage capacitors have ultra-high releasable power density, high operating voltage, fast charge and discharge rate, and long cycle life. They are used in military and civilian fields of high-power pulse technologies such as controlled nuclear fusion, high-power microwave weapons, electric vehicles, and medical electronics. has very important applications.

[0003] Limited by the low energy storage density of dielectric materials, the current dielectric energy storage capacitors have problems of large volume and high application cost. For example, the biaxially oriented polypropylene (BOPP) film is currently the best commercialized dielectric energy storage capacitor, which can only release an ene...

Claims

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