Weakly coupled relaxor construction in lead-free ferroelectrics with simple composition for superior energy-storage performance.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Horizons Pub Date : 2025-03-20 DOI:10.1039/d5mh00261c

Minghao Liu, Chen Ming, Zhen Liu, Hongbo Liu, Bing Han, Narendirakumar Narayanan, Xuantong Liu, Kai Dai, Teng Lu, Xuefeng Chen, Zhigao Hu, Yun Liu, Genshui Wang

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引用次数: 0

Abstract

The development of advanced environmentally friendly energy storage capacitors is critical to meet escalating demands of pulsed power systems. However, challenges persist in enhancing both the recoverable energy density (W_rec) and efficiency (η) simultaneously. In the present study, a strategy involving domain configuration modulation, achieved by simple single rare earth ion doping, was proposed to enhance the energy-storage performance of BaTiO₃. The designed Ba_1-1.5xLa_xTiO₃ (BLT-x) ceramics exhibited an ultrahigh W_rec of 9.2 J cm^-3 and η of 85.0% when x = 0.10. Furthermore, the origin of the superior performance was revealed through first-principles calculations and atomic-scale displacement analysis. The introduction of La generated intense structural fluctuations in the ordered ferroelectric domains, leading to relaxors with weakly coupled polar nanoregions and delayed saturation polarization. Such factors, combined with enhanced E_b, contributed to elongated P-E loops and ultimately ultrahigh W_rec and η. Meanwhile, the BLT-0.10 ceramic demonstrated exceptional temperature stability (-40-120 °C), frequency stability (10-250 Hz) and fatigue stability (10⁶ cycles), along with notable charging-discharging capabilities. The present research not only provides a potential candidate for advanced pulsed power systems, but also offers a novel strategy for achieving superior energy-storage performance in perovskite ferroelectrics through single rare earth ion-doping.

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.