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Composition and Structure Optimized BiFeO3-SrTiO3 Lead-Free Ceramics with Ultrahigh Energy Storage Performance
Small ( IF 13.0 ) Pub Date : 2022-01-14 , DOI: 10.1002/smll.202106515 Fei Yan 1 , Hairui Bai 1 , Guanglong Ge 1 , Jinfeng Lin 1 , Cheng Shi 1 , Kun Zhu 1 , Bo Shen 1 , Jiwei Zhai 1 , Shujun Zhang 2
Small ( IF 13.0 ) Pub Date : 2022-01-14 , DOI: 10.1002/smll.202106515 Fei Yan 1 , Hairui Bai 1 , Guanglong Ge 1 , Jinfeng Lin 1 , Cheng Shi 1 , Kun Zhu 1 , Bo Shen 1 , Jiwei Zhai 1 , Shujun Zhang 2
Affiliation
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Dielectric ceramic capacitors have attracted increasing attention as advanced pulsed power devices and modern electronic systems owing to their fast charge/discharge speed and high power density. However, it is challenging to meet the urgent needs of lead-free ceramics with superior energy storage performance in practical applications. Herein, a strategy for the composition and structural modification is proposed to overcome the current challenge. The lead-free ceramics composed of BiFeO3-SrTiO3 are fabricated. A low hysteresis and high polarization can be achieved via composition optimization. The experimental results and finite element simulations indicate that the two-step sintering method significantly influences the decrease in the grain size and improvement in the breakdown strength (EBDS). A high EBDS of ≈750 kV cm−1 accompanied by a large maximum polarization (≈40 µC cm−2) and negligible remanent polarization (<2 µC cm−2) contribute to the ultrahigh energy density and efficiency values of the order of 8.4 J cm−3 and ≈90%, respectively. Both energy density and efficiency exhibit excellent stability over the frequency range of 1–100 Hz and temperatures up to 120 °C, along with the superior power density of 280 MW cm−3, making the studied BiFeO3-SrTiO3 ceramics potentially useful for high-power energy storage applications.
中文翻译：
成分和结构优化的具有超高储能性能的BiFeO3-SrTiO3无铅陶瓷
介电陶瓷电容器由于其快速的充放电速度和高功率密度，作为先进的脉冲功率器件和现代电子系统越来越受到关注。然而，在实际应用中，如何满足对具有优异储能性能的无铅陶瓷的迫切需求具有挑战性。在此，提出了一种组成和结构修改的策略来克服当前的挑战。BiFeO 3 -SrTiO 3组成的无铅陶瓷是捏造的。通过成分优化可以实现低滞后和高极化。实验结果和有限元模拟表明，两步烧结法显着影响了晶粒尺寸的减小和击穿强度（E BDS）的提高。≈750 kV cm -1的高E BDS伴随着大的最大极化（≈40 µC cm -2）和可忽略的剩余极化（<2 µC cm -2）有助于超高能量密度和大约8.4 焦厘米-3和≈90%，分别。能量密度和效率在 1-100 Hz 的频率范围和高达 120 °C 的温度范围内均表现出出色的稳定性，以及 280 MW cm -3的出色功率密度，使得所研究的BiFeO 3 -SrTiO 3陶瓷可能用于大功率储能应用。
更新日期：2022-01-14
中文翻译：
成分和结构优化的具有超高储能性能的BiFeO3-SrTiO3无铅陶瓷
介电陶瓷电容器由于其快速的充放电速度和高功率密度，作为先进的脉冲功率器件和现代电子系统越来越受到关注。然而，在实际应用中，如何满足对具有优异储能性能的无铅陶瓷的迫切需求具有挑战性。在此，提出了一种组成和结构修改的策略来克服当前的挑战。BiFeO 3 -SrTiO 3组成的无铅陶瓷是捏造的。通过成分优化可以实现低滞后和高极化。实验结果和有限元模拟表明，两步烧结法显着影响了晶粒尺寸的减小和击穿强度（E BDS）的提高。≈750 kV cm -1的高E BDS伴随着大的最大极化（≈40 µC cm -2）和可忽略的剩余极化（<2 µC cm -2）有助于超高能量密度和大约8.4 焦厘米-3和≈90%，分别。能量密度和效率在 1-100 Hz 的频率范围和高达 120 °C 的温度范围内均表现出出色的稳定性，以及 280 MW cm -3的出色功率密度，使得所研究的BiFeO 3 -SrTiO 3陶瓷可能用于大功率储能应用。
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