High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics.
High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics.
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DOI：
10.1038/s41598-017-06966-7
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发表时间：
2017-08-18
影响因子：
4.6
通讯作者：
Wang F
中科院分区：
文献类型：
--
作者：
Yang H;Yan F;Lin Y;Wang T;Wang F
采用传统的固相烧结方法设计并制备了一系列(1-x)Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3-xNa0.73Bi0.09NbO3((1-x)LLBNTZ-xNbN)(x = 0-0.14)陶瓷。系统地研究了陶瓷的相结构、微结构、介电、铁电和储能性能。结果表明，Na0.73Bi0.09NbO_3(NBN)的加入能明显降低材料的剩余极化(Pr)，提高介电常数的温度稳定性。满足TCC150 °C ≤±15%的工作温度范围超过400 °C，组成为x ≥ 0.06。X = 为0.10时的样品在室温下具有最大的储能密度，在178cV/cm时的储能密度为2.04 J/cm~3。此外，(1-x)LLBNTZ-xNbN陶瓷在室温到90 °C的宽温度范围内具有良好的储能性能，0.90LLBNTZ-0.10NBN陶瓷在100 kV/cm和90 °C条件下的储能密度和储能效率分别为0.91 J/cm~3和79.51%，表明(1-x)LBNTZ-xNbN陶瓷在较宽的温度范围内是很有前途的无铅储能材料。
A series of (1-x)Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3-xNa0.73Bi0.09NbO3 ((1-x)LLBNTZ-xNBN) (x = 0-0.14) ceramics were designed and fabricated using the conventional solid-state sintering method. The phase structure, microstructure, dielectric, ferroelectric and energy storage properties of the ceramics were systematically investigated. The results indicate that the addition of Na0.73Bi0.09NbO3 (NBN) could decrease the remnant polarization (P r) and improve the temperature stability of dielectric constant obviously. The working temperature range satisfying TCC 150 °C ≤±15% of this work spans over 400 °C with the compositions of x ≥ 0.06. The maximum energy storage density can be obtained for the sample with x = 0.10 at room temperature, with an energy storage density of 2.04 J/cm3 at 178 kV/cm. In addition, the (1-x)LLBNTZ-xNBN ceramics exhibit excellent energy storage properties over a wide temperature range from room temperature to 90 °C. The values of energy storage density and energy storage efficiency is 0.91 J/cm3 and 79.51%, respectively, for the 0.90LLBNTZ-0.10NBN ceramic at the condition of 100 kV/cm and 90 °C. It can be concluded that the (1-x)LLBNTZ-xNBN ceramics are promising lead-free candidate materials for energy storage devices over a broad temperature range.
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