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Excellent Energy Storage Performances of Superparaelectric Relaxor BaTiO3-Based Multilayer Capacitors by
Long Wang1, Ting Tang1, Jia-Ze Li1
1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
ACS Applied Materials & Interfaces
|August 8, 2025
Summary
This study introduces a new, low-cost multilayer ceramic capacitor (MLCC) material with superparaelectric properties. The developed BT-0.03BD-0.06BLN capacitors achieve high energy storage density and excellent stability for advanced power systems.
Area of Science:
- Materials Science
- Ceramic Engineering
- Electrical Engineering
Background:
- Multilayer ceramic capacitors (MLCCs) are vital for high-power density and temperature stability in electronics.
- Limitations include low energy storage density and high costs associated with noble-metal electrodes and high sintering temperatures.
Purpose of the Study:
- To design an eco-friendly, low-cost MLCC material with enhanced energy storage capabilities.
- To investigate the superparaelectric characteristics of a novel BaTiO3-based system sintered at low temperatures.
Main Methods:
- Development of the (0.97-x)BaTiO3-0.03BiDyO3-xBi(Li1/2Nb1/2)O3 (BT-0.03BD-xBLN) system for 0.04 ≤ x ≤ 0.08.
- Low-temperature sintering (approx. 1030 °C) to reduce defect concentration and cost.
- Characterization of superparaelectric relaxor state and energy storage performance.
Main Results:
- The BT-0.03BD-0.06BLN composition achieved a high recoverable energy storage density (Urec) of 10.12 J cm⁻³ with an efficiency (η) of ~97% at 1350 kV cm⁻¹.
- Excellent temperature stability (20-160 °C) and frequency stability (1-125 Hz) were observed.
- Low sintering temperature minimized defects, contributing to enhanced performance.
Conclusions:
- A cost-effective strategy for high-performance BaTiO3-based MLCCs was demonstrated.
- The developed BT-0.03BD-0.06BLN material shows significant potential for next-generation high-power-density energy storage systems.
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