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Frequency dependent energy storage and dielectric performance of Ba-Zr Co-doped BiFeO3 loaded PVDF based mechanical energy harvesters: effect of corona poling.
Soft Matter ( IF 2.9 ) Pub Date : 2020-08-11 , DOI: 10.1039/d0sm01031f Abhishek Sasmal 1 , Shrabanee Sen 1 , P Sujatha Devi 2
Soft Matter ( IF 2.9 ) Pub Date : 2020-08-11 , DOI: 10.1039/d0sm01031f Abhishek Sasmal 1 , Shrabanee Sen 1 , P Sujatha Devi 2
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Bi0.95Ba0.05Fe0.95Zr0.05O3 (BBFZO) nanoparticles were synthesized by a sol–gel technique to develop a filler material with lower leakage current and oxygen vacancies compared to the host BiFeO3. In this work, we report the enhanced dielectric, ferroelectric, energy storage and energy harvesting performance of BBFZO incorporated PVDF composites. 15 wt% BBFZO loaded PVDF (15BBFZO) exhibited improved polarity (F(EA) = 77.42%) compared to neat PVDF (F(EA) = 37.01%). At an applied field of ∼14 kV cm−1 (1 Hz), this film (15BBFZO) exhibited a maximum energy storage density of 151.18 μJ cm−3 (at 1 Hz). Upon repeated human finger tapping, an average open circuit peak to peak a.c. voltage (VOC) ∼ 20 V was obtained from 15BBFZO. A comprehensive study of frequency dependent D–E loops and an extensive study of the effect of electrical poling on the output performance of the developed composite films have been performed. An improvement of the dipolar polarization was established through a frequency dependent D–E loop study of unpoled and poled 15BBFZO and from other experiments. After poling the energy storage density and VOC of 15BBFZO were 154.66 μJ cm−3 (at 1 Hz) and ∼30 V, respectively. After rectification this output electrical signal was able to charge a 10 μF commercial capacitor up to ∼5.5 V. After poling, the energy storage efficiency (η) of 15BBFZO also improved from 52.49% to 67.85% (at 1 Hz). The frequency dependence of the storage efficiency for all the samples has also been extensively investigated here. At 1 kHz, η improved to 93.30% for poled 15BBFZO.
中文翻译：
Ba-Zr共掺杂BiFeO3负载的PVDF机械能量收集器的频率相关储能和介电性能：电晕极化的影响。
通过溶胶-凝胶技术合成了Bi 0.95 Ba 0.05 Fe 0.95 Zr 0.05 O 3（BBFZO）纳米粒子，以开发出比主体BiFeO 3更低的漏电流和氧空位的填充材料。在这项工作中，我们报告了结合了BBFZO的PVDF复合材料的增强的介电，铁电，能量存储和能量收集性能。与纯PVDF（F（EA）= 37.01％）相比，15重量％的BBFZO负载PVDF（15BBFZO）表现出改善的极性（F（EA）= 77.42 ％）。在约14 kV cm -1（1 Hz）的施加电场下，该薄膜（15BBFZO）的最大储能密度为151.18μJcm -3（在1 Hz）。反复敲击手指，可从15BBFZO获得平均开路峰峰值交流电压（V OC）〜20V。已对频率相关的D – E回路进行了全面研究，并对电极化对已开发复合膜的输出性能的影响进行了广泛研究。通过对非极化和极化15BBFZO进行频率相关的D – E环路研究以及其他实验，可以改善偶极极化。极化后，15BBFZO的储能密度和V OC为154.66μJcm -3（在1 Hz）和〜30V。整流后，该输出电信号能够为10 µF商用电容器充电至约5.5V。极化后，15BBFZO的储能效率（η）也从52.49％提高到67.85％（在1 Hz时）。在此还对所有样品的存储效率的频率依赖性进行了广泛研究。对于极化15BBFZO ，在1 kHz时，η改善至93.30％。
更新日期：2020-09-23
中文翻译：
Ba-Zr共掺杂BiFeO3负载的PVDF机械能量收集器的频率相关储能和介电性能：电晕极化的影响。
通过溶胶-凝胶技术合成了Bi 0.95 Ba 0.05 Fe 0.95 Zr 0.05 O 3（BBFZO）纳米粒子，以开发出比主体BiFeO 3更低的漏电流和氧空位的填充材料。在这项工作中，我们报告了结合了BBFZO的PVDF复合材料的增强的介电，铁电，能量存储和能量收集性能。与纯PVDF（F（EA）= 37.01％）相比，15重量％的BBFZO负载PVDF（15BBFZO）表现出改善的极性（F（EA）= 77.42 ％）。在约14 kV cm -1（1 Hz）的施加电场下，该薄膜（15BBFZO）的最大储能密度为151.18μJcm -3（在1 Hz）。反复敲击手指，可从15BBFZO获得平均开路峰峰值交流电压（V OC）〜20V。已对频率相关的D – E回路进行了全面研究，并对电极化对已开发复合膜的输出性能的影响进行了广泛研究。通过对非极化和极化15BBFZO进行频率相关的D – E环路研究以及其他实验，可以改善偶极极化。极化后，15BBFZO的储能密度和V OC为154.66μJcm -3（在1 Hz）和〜30V。整流后，该输出电信号能够为10 µF商用电容器充电至约5.5V。极化后，15BBFZO的储能效率（η）也从52.49％提高到67.85％（在1 Hz时）。在此还对所有样品的存储效率的频率依赖性进行了广泛研究。对于极化15BBFZO ，在1 kHz时，η改善至93.30％。
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