深圳大学学报（理工版）2025，Vol.42Issue(2)：123-137,15.DOI:10.3724/SP.J.1249.2025.02123
弛豫铁电薄膜储能特性的调控策略
Strategies for regulating energy storage characteristics of relaxor ferroelectric films
摘要
Abstract
Relaxor ferroelectric film capacitors exhibit several advantageous characteristics,including high power density,rapid charge and discharge rates,lightweight construction,compact size,and ease of integration,aligning with the ongoing trend toward high energy density in microelectronic devices.Currently,the recoverable energy density in the relaxor ferroelectric films has exceeded 100 J/cm3,and their charge-discharge efficiencies are higher than 90%.Furthermore,these films demonstrate high breakdown strength and exceptional fatigue resistance,suggesting the preliminary formation of practical value.Based on the energy storage principles of relaxor ferroelectric films,this paper investigates methods for regulating energy storage characteristics of these films from experimental perspective,including element doping,composite structures,and solid solutions.It also explores the physical mechanisms underlying these three regulatory methods at the microscopic,mesoscopic,and macroscopic scales,as well as their advantages and limitations in enhancing energy storage characteristics.The analysis indicates although element doping is easy to achieve,its regulatory scope is limited,and the improvement of the energy storage characteristics relaxor ferroelectric films is not ideal.The composite structure,by using the approximate linear superposition of the related properties of two or more materials,has further improved the energy storage characteristics.However,the lattice mismatch caused by the macro-level interlayer coupling leads to an increase in defect density,which reduces the breakdown strength and reliability of the film.In contrast,the solid solution strategy,by matching different material systems at the microscopic lattice scale,effectively regulates the coexistence of multiple phases and polar nanoregions,significantly enhancing the energy storage characteristics of relaxor ferroelectric films.The research results can provide comprehensive research strategy guidance for improving the energy storage characteristics of relaxor ferroelectric films.关键词
材料物理与化学/电容器/弛豫铁电薄膜/储能/可释放能量密度/充放电效率/元素掺杂/复合结构/固溶体Key words
materials physics and chemistry/capacitors/relaxor ferroelectric film/energy storage/recoverable energy density/charge-discharge efficiency/element doping/composite structure/solid solution分类
信息技术与安全科学引用本文复制引用
吴琼,董蜀湘..弛豫铁电薄膜储能特性的调控策略[J].深圳大学学报（理工版）,2025,42(2):123-137,15.基金项目
National Key Research and Development Program of China(2022YFB3205700 （）
2022YFB3204000) 国家重点研发计划资助项目(2022YFB3205700 （）
2022YFB3204000) （）
