Enhancement of the energy storage and electrocaloric effect performances in 0.4 BCZT–0.6 BSTSn medium-entropy ceramic prepared by sol-gel method

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-07-23 DOI:10.1016/j.jssc.2025.125547

S. Khardazi , Z. Gargar , A. Lyubchyk , O. Zakir , D. Mezzane , M. Amjoud , A. Alimoussa , Z. Kutnjak

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Abstract

Nowadays, advanced dielectric ceramic capacitor-based electrostatic energy-storage science and technology are frequently employed in pulsed power systems. Based on the traditional polycrystalline ferroelectric Ba_0.85Ca_0.15Zr_0.10Ti_0.90O₃, the 0.4 Ba_0.85Ca_0.15Zr_0.10Ti_0.90O₃ –0.6 Ba_0.9Sr_0.1Ti_0.9Sn_0.1O₃ medium-entropy material with good energy storage and electrocaloric effect performances is designed and synthesized by sol-gel method. The structural, dielectric, energy storage and electrocaloric effect properties of the prepared sample were studied. The findings demonstrate that the 0.4 Ba_0.85Ca_0.15Zr_0.10Ti_0.90O₃ –0.6 Ba_0.9Sr_0.1Ti_0.9Sn_0.1O₃ ceramic simultaneously has a significant recoverable energy storage density of 255.4 mJ/cm³, an efficiency of 67.9 %, a large electrocaloric effect temperature change of ΔT = 1.36 K, and a high ξ_max of 0.453 K mm/kV under a low electric field of 30 kV/cm. Moreover, excellent temperature stability (40–120 °C) of the recoverable energy storage W_rec (less than 10 %) was achieved in the investigated sample 0.4BCZT-0.6BSTSn. This study demonstrates that the 0.4BCZT-0.6BSTSn ceramic is a promising candidate for solid-state cooling and energy storage dielectric ceramics through exploring medium-entropy composition.

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溶胶-凝胶法制备0.4 BCZT-0.6 BSTSn中熵陶瓷，增强其储能和热效应性能

目前，基于介质陶瓷电容器的先进静电储能科学技术被广泛应用于脉冲电源系统中。在传统多晶铁电材料Ba0.85Ca0.15Zr0.10Ti0.90O3的基础上，采用溶胶-凝胶法设计合成了具有良好储能和热效应性能的0.4 Ba0.85Ca0.15Zr0.10Ti0.90O3 -0.6 Ba0.9Sr0.1Ti0.9Sn0.1O3中熵材料。研究了制备样品的结构、介电性能、储能性能和热效应性能。结果表明，在30 kV/cm的低电场下，0.4 Ba0.85Ca0.15Zr0.10Ti0.90O3 -0.6 Ba0.9Sr0.1Ti0.9Sn0.1O3陶瓷同时具有显著的可回收储能密度（255.4 mJ/cm3）、效率（67.9%）、较大的热效应温度变化（ΔT = 1.36 K）和0.453 K mm/kV的高ξmax。此外，在所研究的样品0.4BCZT-0.6BSTSn中，可回收储能Wrec具有良好的温度稳定性（40-120℃）（小于10%）。本研究通过对介质熵组成的探索，证明了0.4BCZT-0.6BSTSn陶瓷是固态冷却和储能介质陶瓷的理想候选材料。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.