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Ultrahigh Energy-Storage Multilayer Ceramic Capacitors with Low Sintering Temperature
Min Zhang1,2, Zihao Zheng3, Fengyuan Dong2
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
Advanced Materials (Deerfield Beach, Fla.)
|December 29, 2025
Summary
High-entropy ceramics offer improved energy density and efficiency in multilayer ceramic capacitors (MLCCs). Optimized sintering aids in BFBCST ceramics significantly reduce losses, achieving ultrahigh energy storage density and high efficiency.
Area of Science:
- Materials Science
- Ceramic Engineering
- Electrical Engineering
Background:
- Multilayer ceramic capacitors (MLCCs) are crucial for modern electronics, but suffer from low energy density and efficiency due to conduction and hysteresis losses.
- Developing advanced dielectric materials is essential to overcome these limitations.
Purpose of the Study:
- To design high-entropy BFBCST ceramics with enhanced energy density and efficiency for MLCC applications.
- To investigate the effect of different sintering aids (CuO, MgO, MnO2) on ceramic properties and performance.
Main Methods:
- Synthesized high-entropy 1/3BiFeO3-1/3BaTiO3-1/3Ca0.5Sr0.5TiO3 (BFBCST) ceramics using CuO, MgO, and MnO2 as sintering aids.
- Optimized sintering temperature and evaluated the microstructure and dielectric properties.
- Measured energy storage density and efficiency under high electric fields.
Main Results:
- Optimized sintering aids reduced the optimal sintering temperature to 975°C.
- The synergistic strategy effectively minimized hysteresis and conduction losses.
- BFBCST ceramics with MnO2 sintering aid achieved an ultrahigh energy storage density of 17.9 J cm⁻³ and 94.4% efficiency at 905 kV cm⁻¹.
Conclusions:
- The developed BFBCST-based MLCCs demonstrate superior energy storage performance.
- This approach provides a universal strategy for designing high-performance dielectric materials for advanced MLCC applications.
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