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Updated: Aug 6, 2026
10:40
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
Giant Capacitive Energy Storage in Lead-Free Super-Paraelectric Relaxor Ferroelectric Films With Simple Composition
Zhengyang Kong1, Jie Tu2, Zhuxin Zhang3
1Institutes of Physical Science and Information Technology and Leibniz International Joint Research Center of Materials Sciences of Anhui Province, Anhui University, Hefei, China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 25, 2026
Summary
Sr-doped BaTiO3-CeO2 films show giant capacitive energy storage. This lead-free material offers high efficiency and density, making it ideal for stable, eco-friendly energy storage applications.
Area of Science:
- Materials Science
- Energy Storage
Background:
- Developing lead-free materials for high-performance energy storage is crucial.
- Barium titanate (BaTiO3) based materials are promising but require optimization for energy density and efficiency.
Purpose of the Study:
- To demonstrate giant capacitive energy storage in Sr-doped BaTiO3-CeO2 (B1-xSxB1-xSxC) lead-free epitaxial films.
- To investigate the effect of Sr doping on the structural and polarization properties for energy storage applications.
Main Methods:
- Systematic Sr doping of BaTiO3-CeO2 films (0.0 ≤ x ≤ 1.0).
- Structural analysis using techniques to observe local structures and nanodomains.
- Electrochemical characterization to evaluate polarization behavior, energy storage density, and efficiency.
Main Results:
- Sr doping transformed B1-xSxB1-xSC films from relaxor ferroelectric to super-paraelectric states.
- Optimized Sr doping (x=0.8) achieved a high energy storage efficiency (η) of ~90% and energy storage density (Ue) of 81.2 J/cm³.
- Films exhibited excellent frequency and thermal stability, with disordered structures and suppressed hysteresis.
Conclusions:
- Compositional design via Sr doping is a practical strategy for enhancing energy storage in lead-free ferroelectric films.
- The B1-xSxB1-xSC system offers a promising environmentally friendly alternative for advanced capacitive energy storage.
- The study highlights the potential of tuning polarization and structure for superior dielectric energy storage materials.
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