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Piezoelectric nanogenerator based on lead-free BiFeO3:Sr perovskite
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2022-08-10 , DOI: 10.1016/j.jallcom.2022.166738
Shubhangi Khadtare , Anuruddh Kumar , Uijin Jung , Chengwen Sang , Jinsub Park

The current work reports the synthesis of Bi1−xSrxFeO3 (SBFO; x = 0.0, 0.15, 0.25, 0.35) nanoparticles by sol-gel method and study of its structural and piezoelectric properties. X-ray diffraction identifies the phase transformation from rhombohedral to cubic of BiFeO3 upon doping of Sr. X-ray photoemission spectroscopy revealed that Sr doped BiFeO3 nanoparticles are rich with oxygen vacancies compared to the bare BiFeO3 nanoparticles. The highest maximal polarization value of 6.74 µC cm−2 and remnant polarization 4.20 µC cm−2 are observed for BiFeO3 with 25% of Sr. The SBFO-PENG with 25% of Sr content device provides output voltage and current of 6.35 V and 0.64 μA under pushing tester with 1 Hz frequency, which is higher to that for a bare BiFeO3 PENG. It also exhibits high mechanical robustness, and much stable and durable output even after 1500 s. A maximum power density of ~ 0.31 µWcm−2 was achieve at a resistive load of 108 Ω. The SBFO-PENG device's feasibility is tested by trigging commercial electronics such as charging capacitors and lighting the LED, and it can drive a 0.47 μF capacitor to store the energy of 7.29 μJ within 500 s under pushing tester.



中文翻译:

基于无铅BiFeO3:Sr钙钛矿的压电纳米发电机

目前的工作报告了通过溶胶-凝胶法合成 Bi 1−x Sr x FeO 3 (SBFO; x = 0.0, 0.15, 0.25, 0.35) 纳米粒子及其结构和压电性能的研究。X 射线衍射确定了在掺杂 Sr 时从菱面体到立方的 BiFeO 3相变。X射线光电子能谱显示,与裸BiFeO 3纳米颗粒相比,Sr掺杂的BiFeO 3纳米颗粒富含氧空位。BiFeO 3的最大极化值为 6.74 µC cm -2和剩余极化 4.20 µC cm -2Sr含量为25%的SBFO-PENG在1 Hz频率的推压测试仪下提供6.35 V和0.64 μA的输出电压和电流,高于裸BiFeO 3 PENG的输出电压和电流。它还表现出很高的机械强度,即使在 1500 秒后也具有非常稳定和耐用的输出。在10 8 Ω的电阻负载下实现了~0.31 µWcm -2的最大功率密度。SBFO-PENG器件的可行性通过触发商业电子设备如给电容充电和点亮LED进行测试,在推压测试仪下,它可以驱动一个0.47 μF的电容在500 s内存储7.29 μJ的能量。

更新日期:2022-08-10
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