Energy storage properties of dielectric Bi1.5Zn1.0Nb1.5O7 thick films on flexible metal foil substrates fabricated by aerosol deposition method

초록

In this study, we attempted to achieve a high energy density capacitor using nanocrystalline Bi1.5Zn1.0Nb1.5O7 (BZN) thick film, which is paraelectric material having a linear polarization-electric field behavior. Dense BZN thick films with thickness of 6 similar to 10 mu m were deposited on the flexible metal substrates by Aerosol deposition. BZN thick films were annealed at various annealing conditions (400, 500 and 600 degrees C for 2 h) and their energy storage properties were characterized. The BZN films annealed at 400 degrees C showed the highest discharged energy density (8.87 J/cm(3)) at 1400 kV/cm. The relative permittivity, which is measured with low electric field, was stable up to 250 degrees C, and the discharged energy density, which is measured with high electric field, was stable up to 125 degrees C.

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