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Updated: Sep 7, 2025
Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
Achieving ultrahigh energy storage density and efficiency in 0.90NaNbO3-0.10BaTiO3 ceramics via a composition
Hua Wang1,2, Enzhu Li1,2, Mengjiang Xing3
1National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu, 610054, China. lienzhu@uestc.edu.cn.
Abstract:
Ceramic capacitors feature great power density, fast charge/discharge rates, and excellent thermal stability. The poor energy storage density of ceramic capacitors, on the other hand, significantly limits their application in power systems. In this work, a high recoverable energy storage density of Wrec = 2.68 J cm-3 and an ultrahigh efficiency of η = 90% are simultaneously achieved in the 0.90NaNbO3-0.10BaTiO3 ceramic by doping (Bi0.7La0.3)(Mg0.67Ta0.33)O3 (NNBT-xBLMT). Due to its high bandgap, the NNBT-0.10BLMT ceramic has a large dielectric breakdown strength (BDS) of 414 kV cm-1, consistent with the first-principles calculation based on density functional theory (DFT). Moreover, the NNBT-0.10BLMT ceramic exhibits excellent charge/discharge characteristics, with an ultrahigh current density CD of 526.06 A cm-2 and a high power density PD of 52.61 MW cm-3. In particular, the NNBT-0.10BLMT ceramic exhibits an outstanding temperature (20 °C-110 °C), frequency (10 Hz-120 Hz), and cycling (104 cycles) stability, highlighting its application potential in MLCCs.
