在Bi/Ca修饰AgNbO中的相变3陶具有出色的能量储存密度和储存强度
Zhongna Yan1,2, Jia He1, Haiyan Chen1
1Key Laboratory of Renewable Energy Electric-Technology of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 16, 2025
概括
用Bi3+/Ca2+修改的无AgNbO3陶显示了增强的能量储存,实现了创纪录的高可回收能量密度4.4 J cm-3. 这一突破为高级陶电容器在高脉冲功率应用中提供了有前途的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程 陶工程
背景情况:
- 像AgNbO3这样的无抗铁电 (AFE) 陶对于储能至关重要,但其可回收能量密度 (Wrec) 很低.
- 优化AFE材料对于开发高性能,环保的储能设备至关重要.
研究的目的:
- 为了提高基于AgNbO3的抗铁电陶的可回收能量密度 (Wrec).
- 调查Bi3+/Ca2+ A位点修改对AgNbO3.3的结构和储能特性的影响.
- 探索负责提高储能性能和相位过渡的潜在机制.
主要方法:
- 合成和表征Bi3+/Ca2+修饰的AgNbO3陶.
- 测量介电性质,储能密度 (Wrec) 和电场诱导的相变.
- 分析电流电场循环,以了解相位过渡的动态.
主要成果:
- 在205kV cm-1下实现了4.4 J cm-3的高Wrec和21.46 × 10-3 J kV-1 cm-2的储能强度 (ρ).
- Bi3 + / Ca2 + 修改将双极结温度 (Tf) 转移到室温以下,提高了AFE的稳定性.
- 观察到增强的介电位移和改进的前方 (EF) 和后方 (EB) 场,有助于高Wrec.
- 研究了独特的±EU电流峰值,将它们与特定阶段的现场诱导的AFE-FE过渡联系起来.
结论:
- Bi3+/Ca2+修改显著提高了无AgNbO3陶的储能能力.
- 增强的性能与改进的AFE相稳定性和介电性质有关.
- 这些改性陶对高脉冲功率应用有很大的希望,特别是在陶电容器中.
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