在低电场下加入（Sr0.7Nd0.2）TiO3调控BiFeO3-BaTiO3陶瓷的储能性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.241

Meng Wang , Ting Wang

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引用次数: 0

摘要

BiFeO3-BaTiO3具有高介电常数、优异的铁电性能和机械稳定性，是一种很有前途的储能材料。然而，未经改性的BiFeO3-BaTiO3陶瓷通常具有高残余极化和低击穿强度，导致低储能密度和效率。本研究制备了（1-x）(0.67BiFeO3-0.33BaTiO3)-x(Sr0.7Nd0.2)TiO3陶瓷，并在室温下表现出准立方钙钛矿结构。随着x值的增大，长程有序铁电结构被破坏，弛豫特性增强，晶粒尺寸明显减小。当x = 0.15时，在180 kV/cm下，其最大极化强度（Pmax）达到38.57 μC/cm2。在低电场条件下，该材料具有2.57 J/cm3的可回收储能密度（Wrec）和79%的储能效率（η），同时具有良好的频率稳定性和充放电性能。这些特性表明其作为下一代静电电容器材料的潜在应用。

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Regulating the energy storage properties of BiFeO3-BaTiO3 ceramics by adding (Sr0.7Nd0.2)TiO3 at low electric fields

BiFeO₃-BaTiO₃ exhibits a high dielectric constant, excellent ferroelectric properties, and mechanical stability, making it a promising material for energy storage applications. However, unmodified BiFeO₃-BaTiO₃ ceramics typically exhibit high residual polarization and low breakdown strength, resulting in low energy storage density and efficiency. In this study, (1-x)(0.67BiFeO₃-0.33BaTiO₃)-x(Sr_0.7Nd_0.2)TiO₃ ceramics were prepared and demonstrated a pseudo-cubic perovskite structure at room temperature. As the x value increased, the long-range ordered ferroelectric structure was disrupted, the relaxation characteristics were enhanced, and the grain size decreased significantly. The maximum polarization strength (P_max) of the composition with x = 0.15 reached 38.57 μC/cm² at 180 kV/cm. Under low electric fields, this material achieved an excellent recoverable energy storage density (W_rec) of 2.57 J/cm³ and a high energy storage efficiency (η) of 79 %, while also exhibiting good frequency stability and charge/discharge performance. These characteristics suggest its potential application as a next-generation electrostatic capacitor material.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.