Polyvinylidene difluoride-trifluoroethylene/ nickel doped titanium dioxide composite film

Abstract

The invention discloses a polyvinylidene difluoride-trifluoroethylene(PVDF-TrFE) / nickel doped titanium dioxide (Ni-TiO2) composite film for a supercapacitor. By aid of the method of tape casting, the composite film is prepared by using the PVDF-TrFE as a matrix and the Ni-TiO2 as a filling agent. The composite film is characterized by including a plurality of the following compositions of, by mass percent, 5% to 11% of PVDF-TrFE, 0.5% to 10% of Ni-TiO2 powders, 0.01% to 0.1% of cross-linking agents and 79% to 93% of organic solvents. By changing the mass fraction of nanometer Ni-TiO2, composite films with different dielectric properties can be obtained. The composite film obtained by using the preparation process is high in dielectric constant, low in dielectric loss and good in flexibility,and is a novel inorganic-organic composite dielectric material; besides, the preparation process is simple to operate and environment-friendly and has a good application prospect in the field of high energy storage materials.

Description

technical field [0001] The invention relates to a dielectric material, in particular to a composite film used for a supercapacitor. Background technique [0002] In recent years, with the development of science and the advancement of technology, polymer materials with high dielectric constant and high energy storage density have attracted the attention of researchers. These materials are mainly used in high energy storage capacitors, electrostrictive artificial Muscles, sensors, and more. Although a single inorganic ceramic material has a high dielectric constant and a low dielectric loss, they are expensive, brittle, and difficult to process, so it is difficult to produce on a large scale; traditional organic polymer materials, such as polypropylene, Although polyvinylidene fluoride has good flexibility and dielectric properties, their dielectric constant is relatively low, which is difficult to meet practical needs. Contents of the invention [0003] The purpose of thi...

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Problems solved by technology

Although a single inorganic ceramic material has a high dielectric constant and a low dielectric loss, they are expensive, brittle, and difficult to process, so it is difficult to produce on a large scale; traditional organic polymer materials, such as polypropylene, Although polyvinylidene fluoride has good flexibility and dielectric properties, their dielectric constant is relatively low, which is difficult to meet actual needs

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