Strain and temperature engineering of energy storage performance in ferroelectric/paraelectric superlattices
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Keywords:
Energy storage
Ferroelectric/paraelectric nanocomposite
Domain structure
Phase field model
Abstract
This study investigates the effects of biaxial strain and temperature on polarization domains and energy storage properties of lead titanate/strontium titanate superlattices through phase-field simulations. The superlattice exhibits periodic polarization vortices with alternating symmetries, whose distribution is strain-dependent: compressive strain enlarges vortex regions, while tensile strain suppresses them, favoring uniform alignment. These domain reconfigurations govern hysteresis, with compressive strain yielding single-loop and tensile strain producing double-loop polarization–electric field responses. Energy storage performance exhibits strong strain dependence, under tensile strain achieving optimal discharge energy density of 74.03 J/cm³ and efficiency of 99.74%, a 25% enhancement over compressive conditions. Thermal analysis confirms stable energy storage up to 500°C, highlighting operational robustness. By correlating mechanical-thermal stimuli with domain evolution, this work establishes strain engineering as an effective strategy for designing ferroelectric superlattices with on-demand energy storage capabilities, advancing the development of adaptive dielectric capacitors.
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Published
Sep 30, 2025
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How to Cite
Dang, H. T., D. T. H. Hue, B.-H. Vu, T.-G. Nguyen, V.-H. Dinh, and L. V. Lich. “Strain and Temperature Engineering of Energy Storage Performance in ferroelectric/Paraelectric Superlattices”. The University of Danang - Journal of Science and Technology, vol. 23, no. 9B, Sept. 2025, pp. 127-31, doi:10.31130/ud-jst.2025.23(9B).516E.
