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Updated: Aug 7, 2025
10:40
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.3K
Large Energy Capacitive High-Entropy Lead-Free Ferroelectrics.
Liang Chen1, Huifen Yu1,2, Jie Wu1,2
1Beijing Advanced Innovation Center for Materials Genome Engineering, Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Nano-Micro Letters
|March 10, 2023
Summary
A novel high-entropy strategy significantly boosts energy storage density in lead-free ceramics, achieving 13.8 J cm⁻³ for advanced pulse power capacitors. This breakthrough offers a ten-fold increase over low-entropy materials, paving the way for next-generation energy storage solutions.
Area of Science:
- Materials Science
- Solid State Physics
- Energy Storage
Background:
- Advanced lead-free ceramics are crucial for next-generation pulse power capacitors.
- Current materials face limitations in energy storage density and efficiency.
Purpose of the Study:
- To investigate the effect of increasing configuration entropy on lead-free relaxor ferroelectrics for enhanced energy storage.
- To systematically reveal the evolution of energy storage performance and domain structure with increasing entropy.
Main Methods:
- Fabrication of high-entropy lead-free relaxor ferroelectrics.
- Characterization of energy storage density, efficiency, and breakdown field.
- Analysis of domain structure evolution with increasing configuration entropy.
Main Results:
- Achieved ultrahigh energy storage density of ~13.8 J cm⁻³ and ~82.4% efficiency.
- Demonstrated a nearly ten-fold increase in energy storage density compared to low-entropy materials.
- Identified enhanced random field, decreased nanodomain size, and improved breakdown field as key factors.
Conclusions:
- The high-entropy strategy is effective for designing high-performance lead-free dielectrics.
- This approach significantly enhances comprehensive energy storage performance.
- Promotes the development of advanced capacitors with superior energy storage capabilities.
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