柔性Pb_(0.99)Sm_(0.01)(Mg_(1/3)Nb_(2/3))_(0.68)Ti_(0.32)O_(3)弛豫铁电薄膜储能特性  

Study on Energy Storage Performance of Flexible Pb_(0.99)Sm_(0.01)(Mg_(1/3)Nb_(2/3))_(0.68)Ti_(0.32)O_(3)Relaxor-Ferroelectric Film

作　　者：吕盼盼 石长清 辛乐[3] 战行 张书志 王佳 李瑞航 李存成 任路超 杨长红[4] 张明伟[1,2] 程新 LV Panpan;SHI Changqing;XIN Le;ZHAN Hang;ZHANG Shuzhi;WANG Jia;LI Ruihang;LI Cuncheng;REN Luchao;YANG Changhong;ZHANG Mingwei;CHENG Xin(School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;Analytical Texting Center,Shandong University of Technology,Zibo 255000,Shandong,China;Department of Mathematics and Physics,Zibo Normal College,Zibo 255130,Shandong,China;Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,Shandong,China)

机构地区：[1]山东理工大学材料科学与工程学院,山东淄博255000 [2]山东理工大学分析测试中心,山东淄博255000 [3]淄博师范高等专科学校数理系,山东淄博255130 [4]济南大学,山东省建筑材料制备与测试技术重点实验室,济南250022

出　　处：《硅酸盐学报》2024年第4期1301-1309,共9页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金青年科学基金(52302145);山东省自然科学基金青年基金(ZR2023QE126);国家自然科学基金面上项目(51972144)。

摘　　要：弛豫铁电薄膜电容器因具有细长电滞回线和高能量转化效率成为介电储能应用的理想选择。本工作采用溶胶凝胶法在沉积有LaNiO3缓冲层的云母基底上直接制备了柔性Pb_(0.99)Sm_(0.01)(Mg_(1/3)Nb_(2/3))_(0.68)Ti_(0.32)O_(3)(PSMNT)薄膜,系统研究了柔性PSMNT膜的微观结构、介电、铁电和储能性能。X射线衍射结果表明薄膜样品为单一钙钛矿相。扫描电子显微镜结果显示薄膜的晶粒尺寸均匀且致密。在极化特性方面,所制备的柔性PSMNT薄膜因具有弛豫性,其电滞回线呈现出纤细束腰特征,在外加电场2468 kV/cm下,其最大饱和极化为74.5μC/cm^(2),剩余极化为16.4μC/cm^(2)。薄膜电容器击穿前最大可释放能量密度和储能效率分为40.7 J/cm^(3)和70%,并且表现出较好的频率(1~20 kHz)和温度(25~120℃)稳定性。此外,样品借助云母衬底可实现优异的可弯折性,在弯曲半径R低至2 mm和弯曲疲劳循环1000次(R=4 mm)后,其储能性能仍可保持。此研究表明以云母为基底的PSMNT弛豫薄膜在柔性储能领域具有很大的应用潜力。Introduction Global energy crisis has sparked unprecedented momentum for renewable energy sources.Energy storage systems such as electrochemical capacitors,batteries,fuel cells,and dielectric capacitors are considered as the most important technologies to address rapidly growing energy demands and environmental concerns.In comparison with batteries or fuel cells,dielectric capacitors possess high power density resulting from their faster charging/discharging characteristics,which are advantageous for power electronics and pulse power applications.The majority of materials used for fabrication of dielectric capacitors consist of linear dielectrics,ferroelectrics,relaxor ferroelectrics,and anti-ferroelectrics.Among these materials,relaxor ferroelectrics are the most popular choice for capacitor applications because of their lack of long-range order ferroelectric domains.(1–x)Pb(Mg_(1/3)Nb_(2/3))O_(3)-xPbTiO_(3)(PMNT)as the typical representative of relaxor ferroelectrics,which possesses small remanent polarization and low coercive electric field,enjoys promising prospects in dielectric capacitor application.Nevertheless,limited by its low Eb,the energy storage density and efficiency for pure PMNT film are not yet ideal.Moreover,it is difficult for traditional PMNT film to be bendable due to limitations of rigid substrates,which lead to descend of flexibility and cannot meet modern flexible electronic production requirements.In this paper,to overcoming the bottlenecks of inflexibility and inferior energy storage performance of the pure PMNT films,rare-earth element of Sm and promising LaNiO_(3)(LNO)buffer layer were introduced into PMNT thin film.To obtain extraordinary flexibility,two-dimensional mica substrate was used to prepare the modified PMNT film via a simple sol-gel method.The microstructure,dielectric,ferroelectric and energy storage properties of the flexible Pb_(0.99)Sm_(0.01)(Mg_(1/3)Nb_(2/3))_(0.68)Ti_(0.32)O_(3)(PSMNT)film were studied systematically.Methods The PSMNT and LNO films were prepared usi

关 键 词：铌镁酸铅钛酸铅基薄膜 弛豫铁电体 介电储能 柔性 

分 类 号：TB34[一般工业技术—材料科学与工程]