Synergistically Optimizing Pressure-Driven Energy Conversion and Energy-Harvesting Application via Modulating an Antiferroelectric-to-Ferroelectric Overlap Zone in Antiferroelectric Ceramics,ACS Applied Materials & Interfaces

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Synergistically Optimizing Pressure-Driven Energy Conversion and Energy-Harvesting Application via Modulating an Antiferroelectric-to-Ferroelectric Overlap Zone in Antiferroelectric Ceramics
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-01-22 , DOI: 10.1021/acsami.3c16741
Meng Xie _{1,

2} , Hengchang Nie ₁ , Bing Han ₁ , Yizheng Bao ₁ , Fei Cao ₁ , Genshui Wang _{1,

2,

3}

Affiliation

Dielectric ceramics with ultrahigh polarization and energy density are the core components used in next-generation pulse power generators based on explosive energy conversion. However, the low polarization of ferroelectric materials and high depolarized pressure hinder their development toward miniaturization, light weight, and integration, while antiferroelectric materials possessing larger nonlinear saturated polarization and rich phase structure are neglected in pulse power energy conversion. Here, an effective strategy of constructing antiferroelectric-to-ferroelectric overlap zone is achieved in binary system (1 – x)(Pb,La)(Zr,Ti)O₃–xBa(Al_1/2Nb_1/2)O₃ antiferroelectric ceramics to realize an excellent polarization of 41 μC/cm² and a large depolarization efficiency of >99% under 150 MPa as well as a record high energy harvesting density of 2.5 J/cm³ under 400 MPa. The excellent comprehensive energy conversion and energy harvesting performance is mainly attributed to the strategy of antiferroelectric-to-ferroelectric overlap zone and improved microdomain density, at which orthorhombic-to-rhombohedral structure evolution is confirmed by transmission electron microscopy, piezo-response force microscopy, and Raman spectrum, resulting in substantially enhanced remanent polarization compared to ferroelectric ceramics. Besides, excellent temperature stability (∼180 °C) and optimized depolarization pressure also support that this binary system is a candidate for energy conversion and energy harvesting application. This work demonstrates that antiferroelectric-to-ferroelectric overlap based on antiferroelectric materials is an excellent strategy to develop dielectric materials with excellent depolarized polarization and energy harvesting density for energy conversion and harvesting.

中文翻译：

通过调节反铁电陶瓷中的反铁电到铁电重叠区协同优化压力驱动能量转换和能量收集应用

具有超高极化和能量密度的介电陶瓷是基于爆炸性能量转换的下一代脉冲发电机的核心部件。然而，铁电材料的低极化和高去极化压力阻碍了其向小型化、轻量化和集成化的发展，而具有较大非线性饱和极化和丰富相结构的反铁电材料在脉冲功率能量转换中被忽视。这里，实现了在二元系 (1 – x )(Pb,La)(Zr,Ti)O ₃ – x Ba(Al _1/2 Nb _1/2 )O 中构建反铁电到铁电重叠区的有效策略₃反铁电陶瓷实现了41 μC/cm ²的优异极化率和150 MPa下>99%的大去极化效率，以及400 MPa下创纪录的2.5 J/cm ³的高能量收集密度。优异的综合能量转换和能量收集性能主要归功于反铁电到铁电重叠区的策略和提高的微域密度，其中正交到菱面体结构的演化通过透射电子显微镜、压电响应力显微镜、和拉曼光谱，与铁电陶瓷相比，剩余极化大大增强。此外，出色的温度稳定性（∼180°C）和优化的去极化压力也支持该二元系统是能量转换和能量收集应用的候选者。这项工作表明，基于反铁电材料的反铁电-铁电重叠是开发具有优异去极化和能量收集密度的介电材料以进行能量转换和收集的绝佳策略。

更新日期：2024-01-22

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