Synergistic effect to improve energy storage performance in <111> textured BNT-based ceramics under low electric field via orientation engineering as well as co-doping BY and STO

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-08-23 DOI:10.1016/j.materresbull.2024.113065

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Abstract

Bi_0.5Na_0.5TiO₃ ceramic is a promising dielectric energy storage material due to its high spontaneous polarization (> 40 μC/cm²). Although many studies have been carried out to enhance the energy storage performance of Bi_0.5Na_0.5TiO₃ ceramic, achieving better energy storage performance is still a considerable challenge. Herein, Bi_0.5Na_0.5TiO₃-BiYbO₃-SrTiO₃ (BNT-BY-STO) relaxor ferroelectric ceramics were constructed, and <111>-oriented (1-x)(0.99BNT-0.01BY)-xSTO ceramics were successfully fabricated by a templated grain growth method. The moderate energy storage performance (the reversible energy storage density of 3.26 J/cm³ and energy storage efficiency of 76.3 % under 290 kV/cm) can be achieved in <111>-oriented 0.8(0.99BNT-0.01BY)-0.2STO ceramics. The enhanced energy storage performance of textured BNT-BY-STO ceramics could be mainly attributed to the grain refinement of STO, and the improved breakdown strength and relaxation behavior caused by orientation engineering. These findings demonstrate that the co-doping of BY and STO and orientation engineering are effective strategies for improving the energy storage performance of BNT ceramic.

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通过取向工程以及共掺杂 BY 和 STO，在低电场条件下提高纹理 BNT 基陶瓷储能性能的协同效应

Bi0.5Na0.5TiO3 陶瓷具有很高的自发极化（> 40 μC/cm2），是一种很有前途的电介质储能材料。尽管已有许多研究旨在提高 Bi0.5Na0.5TiO3 陶瓷的储能性能，但要实现更好的储能性能仍是一项相当大的挑战。本文构建了Bi0.5Na0.5TiO3-BiYbO3-SrTiO3（BNT-BY-STO）弛豫铁电陶瓷，并通过模板晶粒生长法成功制备了<111>取向（1-x）（0.99BNT-0.01BY）-xSTO陶瓷。取向 0.8（0.99BNT-0.01BY）-0.2STO 陶瓷具有适中的储能性能（290 kV/cm 下的可逆储能密度为 3.26 J/cm3，储能效率为 76.3 %）。纹理 BNT-BY-STO 陶瓷储能性能的提高主要归因于 STO 的晶粒细化以及取向工程改善了击穿强度和弛豫行为。这些发现表明，BY 和 STO 的共掺杂以及取向工程是提高 BNT 陶瓷储能性能的有效策略。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.