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Updated: Feb 12, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
Excellent Energy Storage Performance and Thermal Stability in Lead-Free Tungsten Bronze-Based Relaxor Ferroelectric
Jiaming Liu1, Menghan Li1, Peiyao Zhao2
1State Key Laboratory of Information Photonics and Optical Communications, School of Physical Science and Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Abstract:
Dielectric energy storage capacitors have attracted considerable attention due to their excellent performance. Tungsten bronze-type ceramics have long been underestimated for energy storage applications owing to their relatively low breakdown strength and polarization. In this work, a lead-free relaxor ferroelectric ceramic, BaSrTiNb2-xTaxO9, was developed through Ta doping. Under an applied electric field, the material achieves a high recoverable energy density of 9.5 J/cm3 with an efficiency of 87.8%. Notably, it also exhibits excellent thermal stability and ultrafast discharge characteristics. The optimization strategy proposed in this study offers valuable guidance for the development of high-performance dielectric energy storage ceramics. It points to a direction for designing materials that combine superior energy storage properties with good temperature stability and provides an important reference for promoting technological innovation in advanced ceramic-based energy storage devices such as multilayer ceramic capacitors (MLCCs). It is expected to lead the development of the next generation of high-temperature stable dielectric materials.
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