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

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Department of Chemical Engineering and Technology, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
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Material Physics and Chemistry, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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Department of Optoelectronic Information Science, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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Harbin Institute of Technology, School of Energy Science and Engineering, Harbin 150001, China
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Authors to whom correspondence should be addressed.
Crystals 2019, 9(11), 575; https://doi.org/10.3390/cryst9110575
Received: 22 September 2019 / Revised: 19 October 2019 / Accepted: 30 October 2019 / Published: 1 November 2019
(This article belongs to the Special Issue Piezoelectric Crystals and Ceramics)
We reported a sandwich structured Pb(Zr0.4Ti0.6)O3/BaZr0.2Ti0.8O3/Pb(Zr0.4Ti0.6)O3 (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 BaZr0.2Ti0.8O3 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-Text
Keywords: sandwich structure; thin films; energy storage; dielectric properties sandwich structure; thin films; energy storage; dielectric properties
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MDPI and ACS Style

Gu, J.; Sun, Q.; Chen, X.; Song, Y.; Tang, Y.; Wang, D.; Qu, P. Energy Storage Performance of Sandwich Structured Pb(Zr0.4Ti0.6)O3/BaZr0.2Ti0.8O3/Pb(Zr0.4Ti0.6)O3 Films. Crystals 2019, 9, 575.

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