具有准线性极化的高熵工程 Bi0.47Na0.47Ba0.06TiO3 基弱耦合弛豫铁电体，可提高储能性能

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-04-11 DOI:10.1016/j.cej.2025.162551

Yue Pan, Yu Zhang, Qinpeng Dong, Jiangping Huang, Shize Zhao, Xiuli Chen, Xu Li, Huanfu Zhou

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引用次数: 0

摘要

基于介质电容的静电储能技术在先进的脉冲电源系统中得到了广泛的应用。然而，由于早期极化饱和和高极化滞后的影响，在高电场下实现高能量密度（Wrec）和高能量效率（η）仍然是一个挑战。采用高熵法制备的（Bi0.5Na0.5） tio3基陶瓷在680 kV/cm的电场作用下，Wrec值为7.29 J/cm3， η值为88.75 %。一方面，局域随机场的熵驱动增强诱导了一个准线性P-E磁滞回线，使得高电场下的Wrec快速增加；同时，由于极性纳米区（PNRs）的可逆性和电场诱导的RFE-FE（弛豫铁电到铁电）相变的存在，在高电场作用下保持了高η。此外,陶瓷展览优秀稳定的储能对温度(ΔWrec & lt; 6.6 %,Δη & lt; 5.5 %, 25 - 200°C)和频率(ΔWrec & lt; 9.2 %,Δη & lt; 4.1 % 5 - 160 Hz)。这项工作表明，熵驱动的极化行为调制是设计先进电容器的可行方法。

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High-entropy engineered Bi0.47Na0.47Ba0.06TiO3-based weakly coupled relaxor ferroelectrics with quasi-linear polarization for enhanced energy storage performance

Dielectric capacitor-based electrostatic energy storage technology has been widely employed in advanced pulsed power systems. However, achieving high energy density (W_rec) and energy efficiency (η) at high electric fields remains a challenge due to the effects of early polarization saturation and high polarization hysteresis. In this work, (Bi_0.5Na_0.5)TiO₃-based ceramics, prepared via high-entropy engineering, exhibit both excellent W_rec of 7.29 J/cm³ and η of 88.75 % under an electric field of 680 kV/cm. On the one hand, the entropy-driven enhancement of local random fields induces a quasi-linear P-E hysteresis loop, enabling rapid increase of W_rec under high electric fields. Simultaneously, the high η under high electric fields is maintained due to the reversibility of the polar nano-regions (PNRs) and absence of the electric field-induced RFE-FE (relaxor ferroelectric to ferroelectric) phase transition. Moreover, the ceramic exhibits excellent stability in energy storage with respect to temperature (ΔW_rec < 6.6 %, Δη < 5.5 %, 25–200 °C) and frequency (ΔW_rec < 9.2 %, Δη < 4.1 %, 5–160 Hz). This work demonstrates that entropy-driven modulation of polarization behavior is a feasible approach for designing advanced capacitors.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.