Energy storage properties in SrTiO3-Bi3.25La0.75Ti3O12 thin films
Energy storage properties in SrTiO3-Bi3.25La0.75Ti3O12 thin films
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SrTiO3-Bi3.25La0.75Ti3O12 薄膜的储能特性
DOI：
10.1016/j.jallcom.2019.05.333
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发表时间：
2019
影响因子：
6.2
通讯作者：
Zhu Xuebin
中科院分区：
文献类型：
--
作者：
Zhang Li;Yang Bingbing;Yu Jiangying;Deng Yan;Huang Kai;Zhang Min;Zhu Xuebin
铁电薄膜具有细长的电场相关极化滞后环，表现出小的剩余极化和大的极化，以获得高的可恢复能量密度和储能效率。本文采用溶胶-凝胶法在Bi3.25La0.75Ti3O12薄膜上制备了SrTiO3合金化效应，并对其储能性能进行了研究。随着Bi3.25La0.75Ti3O12含量的增加，晶体质量增加，晶粒度增大，极化改善。当Bi3.25La0.75Ti3O12含量大于0.6时，可以得到细长的电场相关磁滞回线。优化的组成为0.4SrTiO_3-0.6Bi3.25La0.75Ti3O_(12)薄膜，可回收能量密度为44.7 J/cm~3，效率为87.4%。此外，0.4SrTiO3-0.6Bi3.25La0.75Ti3O12薄膜在较宽的频率范围内表现出优异的储能性能、耐疲劳性能和热稳定性。结果表明，通过SrTiO_3合金化可以有效地改善Bi3.25La0.75Ti3O12薄膜的储能性能，可作为介质储能电容器的候选材料。
Ferroelectric thin films with slim electric field dependent polarization hysteresis loops, showing small remnant polarization and large polarization, are desired to obtain high recoverable energy density and efficiency for ferroelectric capacitors in energy storage performance. Here, SrTiO3alloying effects on Bi3.25La0.75Ti3O12thin films are prepared by sol-gel method and the energy storage performance have been investigated. With increasing the Bi3.25La0.75Ti3O12content, the crystalline quality and grain size are increased as well as the improvement in polarization. Slim electric field dependent hysteresis loops can be obtained when the Bi3.25La0.75Ti3O12content is higher than 0.6. The optimized composition is 0.4SrTiO3-0.6Bi3.25La0.75Ti3O12thin film with the recoverable energy density and high efficiency of 44.7 J/cm3and 87.4%, respectively. Moreover, the 0.4SrTiO3-0.6Bi3.25La0.75Ti3O12thin film shows excellent energy storage performance in wide frequency range, fatigue endurance and thermal stability. The results suggest that energy storage performance in Bi3.25La0.75Ti3O12thin films can be effectively improved through SrTiO3alloying, and can be considered as candidates for dielectric energy storage capacitors.