Excellent energy storage performance in NaNbO3-based relaxor antiferroeic ceramics under a low electric field

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Electroceramics Pub Date : 2022-06-04 DOI:10.1007/s10832-022-00283-w

Xuxin Cheng, Xiaoming Chen, Pengyuan Fan

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引用次数: 5

Abstract

NaNbO₃-based antiferroelectric (AFE) ceramics have the prominent advantages of stable performance and low cost. However, its energy storage property is often remarkably limited by the hysteresis of the antiferroelectric to ferroelectric phase transformation. In this work, 0.88Na(Nb_1−xTa_x)O₃–0.12Bi_0.2Sr_0.7TiO₃ (x = 0–0.075) antiferroelectric ceramics were synthesized using a conventional mixed oxide route. Ta⁵⁺ were completely dissolved into the lattice of 0.88NaNbO₃–0.12Bi_0.2Sr_0.7TiO₃ to form a pure perovskite structure. With increased Ta content, the AFE orthogonal P phase was replaced by AFE orthogonal R phase progressively. Meanwhile, the dielectric constant curve showed relaxor-like properties. As a result, slender P–E curves with reduced hysteresis loss and decreased residual polarization were achieved. Interestingly, a large recoverable energy storage density (W_rec ~ 2.16 J cm⁻³) and high energy storage efficiency (η ~ 80.7%) were obtained simultaneously under a low driving electric field of 15 kV mm⁻¹ at doping ratio (x) of 0.075. In addition, the 0.88Na(Nb_0.925Ta_0.075)O₃–0.12Bi_0.2Sr_0.7TiO₃ sample exhibited excellent temperature stability, indicating an ideal candidate in future pulsed power capacitor.

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纳米bo3基弛豫反铁陶瓷在低电场条件下具有优异的储能性能

nanbo3基反铁电(AFE)陶瓷具有性能稳定、成本低等突出优点。然而，其储能性能往往受到反铁电向铁电相变的滞后性的显著限制。本文采用传统的混合氧化物工艺合成了0.88Na(Nb1−xTax) O3-0.12Bi0.2Sr0.7TiO3 (x = 0-0.075)反铁电陶瓷。Ta5+完全溶解在0.88NaNbO3-0.12Bi0.2Sr0.7TiO3晶格中，形成纯钙钛矿结构。随着Ta含量的增加，AFE正交P相逐渐被AFE正交R相所取代。同时，介电常数曲线表现出类弛豫特性。结果，获得了较细的P-E曲线，减小了磁滞损耗和残余极化。有趣的是，在15 kV mm−1的低驱动电场下，掺杂比(x)为0.075，同时获得了较大的可回收储能密度(Wrec ~ 2.16 J cm−3)和较高的储能效率(η ~ 80.7%)。此外，0.88Na(Nb0.925Ta0.075) O3-0.12Bi0.2Sr0.7TiO3样品具有良好的温度稳定性，是未来脉冲功率电容器的理想候选材料。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.