利用合理掺杂调制缺陷工程实现无铅压电陶瓷的高温能量收集

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2024-11-04 DOI:10.1007/s40820-024-01556-5

Kaibiao Xi, Jianzhe Guo, Mupeng Zheng, Mankang Zhu, Yudong Hou

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引用次数: 0

摘要

高温压电能量收集器（HT-PEH）是替代化学电池实现高温无线传感器独立供电的重要解决方案。然而，无铅压电陶瓷必须同时具有优异的性能，包括高优点系数（FOM）、绝缘电阻率（ρ）和去极化温度（Td），但这很难实现，尤其是在 250 °C 下工作的无铅压电陶瓷更是如此。在这里，通过创新的缺陷工程和精细的锰掺杂，BiFeO3-BaTiO3 陶瓷实现了良好的平衡性能。由于极化构型优化提高了电致伸缩系数，高价锰离子调节了铁离子氧化态，缺陷偶极稳定了畴取向，这些协同作用在锰离子的固溶极限下实现了全面优异的电性能（Td = 340 ℃，ρ250 ℃ > 107 Ω cm，FOM250 ℃ = 4905 × 10-15 m2 N-1）。利用合理设计的压电陶瓷组装的 HT-PEH 可在 250 ℃ 下对商用电解电容器进行快速充电，并具有较高的能量转换效率（η = 11.43%）。这些特性表明，缺陷工程定制的 BF-BT 可以满足高端 HT-PEHs 的要求，为开发在高温环境下工作的自供电无线传感器铺平了新的道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Defect Engineering with Rational Dopants Modulation for High-Temperature Energy Harvesting in Lead-Free Piezoceramics

查看原文本刊更多论文

Defect Engineering with Rational Dopants Modulation for High-Temperature Energy Harvesting in Lead-Free Piezoceramics

Highlights

The solution limit of manganese ion in BiFeO₃–BaTiO₃ (BF–BT) was determined by combining multiple advanced characterization methods.
The defect engineering associated with fine doping can realize the co-modulation of polarization configuration, iron oxidation state and domain orientation.
The BF–BT–0.2Mn piezoelectric energy harvester shows excellent power generation capacity at 250 °C, which is an important breakthrough for lead-free piezoelectric devices.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.