Improving energy storage performance through structural modulation in Ca0.5(Sr0.5Ba0.5)2Nb4TaO15-based tungsten bronze ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.424

Yan Wang , Shuiting Hou , Yihan Tong , Shudong Xu , Xiaoqian Ju , Pu Guo , Xue Dong , Lingling Wei

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引用次数: 0

Abstract

A range of tungsten bronze ceramics, Ca_0.5-0.5xNa_x(Sr_0.5Ba_0.5)₂Nb₄TaO₁₅ (CSBN-Ta-Nax), were synthesized using conventional solid-phase methods in order to investigate the influence of Na substitution on the structural characteristics, relaxor behavior, and energy-storage capabilities. Two primary findings emerged from the study: (1) an increase in Na ⁺ concentration led to a structural transition from a tetragonal paraelectric P4/mbm phase to an orthorhombic Bbm2 phase, accompanied by an expansion in cell volume. (2) A transition from relaxor to ferroelectric behavior at room temperature was observed, which could be attributed to a reduction in A-site vacancies, leading to enhanced interactions between B-O bonds and increased polarization. Ultimately, the CSBN-Ta-Na0.8 composition demonstrated a remarkable excellent energy-storage density (W_rec = 3.04 J/cm³) and exceptionally high efficiency (η = 90 %). Furthermore, the charging-discharging properties was assessed, revealing a rapid discharge rate (t_0.9 = 59 ns) and a large powder density (P_D = 147.6 MW/cm³).

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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.