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Updated: May 9, 2025

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

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Published on: April 8, 2018

在一个自组织的Trirelaxor-Antiferroelectric纳米复合物中,在广泛的温度范围内,具有优越的能量储存性能

Jingzhe Xu¹, Yongbin Liu¹, Dong Wang²

¹State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, China.

Advanced materials (Deerfield Beach, Fla.)

|April 29, 2025

概括

这项研究引入了一种用于储能介电物的新型纳米复合材料,在室温至200°C时实现高性能. 该材料提供了卓越的能量密度和效率,克服了现有的无介电材料的局限性.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
储能储能储能储能储能储能

背景情况:

储能介电器在广泛的温度范围内保持性能方面面临挑战.
在先进的应用中,同时实现高能量密度和高效率至关重要.
现有的无介电材料在高温下经常表现出性能降低.

研究的目的:

设计和研究一种自我组织的纳米复合材料,用于优越,温度稳定的储能介电.
为了克服从室温到高温实现一致的介电性能的根本悖论.
为了探索抗铁电 (AFE) 颗粒在三拉克索 (TRE) 矩阵中的潜力,以增强能量存储.

主要方法:

通过纳米级阶段分离制造一个 (1-x) ((Ba,Sr) ((Ti,Sn) O3-xBi1.5ZnNb1.5O7纳米复合材料.
使用高分辨率传输电子显微镜 (HRTEM) 和同步X射线衍光测量 (XRD) 进行了表征.
使用压响应力显微镜 (PFM),相场模拟和热刺激脱极化电流 (TSDC) 分析电气性能.

主要成果:

最佳组成 (x=0.11) 显示出高能量密度 (RT时8.5 J cm−3,200°C时4.85 J cm−3) 和效率 (>RT时94.8%,200°C时>90%).
同时存在的纳米AFE粒子和TRE纳米领域在广泛的温度范围内被观察到是稳定的.
证实了无hysteresis的TRE纳米域切换和在高温下增加的电阻/分解强度,归因于TRE/AFE接口.

结论:

设计的纳米复合材料表现出卓越的,温度稳定的储能性能,性能优于目前的无介电材料.
AFE和TRE纳米结构的共存和稳定性是材料在广泛的温度适用性的关键.
通过控制的纳米结构和电荷捕获效应,可以实现增强的极化和在高温下抑制介电损失.

关键词:

储能储能是一种储能.在高温下表现出色.纳米复合材料的使用方法放松器铁电器铁电器三临界效应的三临界效应

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