With the rapid development of electronics

information and electric power industry

high energy density dielectric material is of more and more interest. For preparing the dielectric materials with high energy storage density for capacitor

AI/BT/PVDF and Ag/BT/PVDF three-phase composites material are obtained by the solvent blending method（DMF as solvent）

the relative dielectric constant

dielectric breakdown field strength and energy storage density of the three-phase composite material are tested and analyzed. It is shown by the test result that the relative dielectric constant of the composite material remains almost unchanged compared to it before mixing into the metal and in the case of the content of Al at 2.0% and BT at 7.5%

the energy density of the composite material is

up to 2.0 J/cm

3

which is 5 times of pure PVDF.