Energy Storage Performance of Sandwich Structured Pb(Zr0.4Ti0.6)O3/BaZr0.2Ti0.8O3/Pb(Zr0.4Ti0.6)O3 Films

We reported a sandwich structured Pb(Zr 0.4Ti 0.6)O 3/BaZr 0.2T i0.8O 3/Pb(Zr 0.4Ti 0.6)O 3 (PZT/BZT/PZT) film fabricated by using the sol–gel method, which was dense and uniform with a unique perovskite structure. The PZT/BZT/PZT films displayed high dielectric constants up to 1722.45 at the frequency of 10 kHz. Additionally, the enhanced energy storage density of 39.27 J·cm ？3 was achieved at room temperature and 2.00 MV/cm, which was higher than that of the individual BaZr 0.2T i0.8O 3 film (21.28 J·cm ？3). Furthermore, the energy storage density and efficiency of PZT/BZT/PZT film increased slightly with the increasing temperature from ？140 °C to 200 °C. This work proves the feasibility and effectiveness of a sandwich structure in improving dielectric, leakage, and energy storage performances, providing a new paradigm for high-energy–density dielectrics applications. View Full-Tex