CaBi4Ti4O15-Bi(Fe0.93Mn0.05Ti0.02)O3铁电固溶体薄膜的制备及储能特性
Preparation and Energy Storage Properties of CaBi4Ti4O15-Bi(Fe0.93Mn0.05Ti0.02)O3 Ferroelectric Solid Solution Thin Films
余致尧 1王文文 1司景翔 1苑秀芳 1李成龙 1林秀娟 1杨长红1
作者信息
- 1. 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
- 折叠
摘要
采用金属有机分解法结合旋涂技术,在Pt(111)/TiO2/SiO2/Si衬底上制备(1-x)CaBi4Ti4O15-xBi(Fe0.93Mn0.05Ti0.02)O3(CBT-xBFMT,x=0,0.05,0.10,0.15)固溶体薄膜,通过X-射线衍射仪、场发射扫描电子显微镜、铁电分析仪和阻抗分析仪,系统研究了 CBT基薄膜的储能性能.结果表明,所制备的薄膜均呈现出多晶铋层状结构,无杂相生成.BFMT的引入增大了薄膜的最大极化强度Pm和抗击穿场强Eb,并降低了漏电流密度.随着BFMT固溶量的增加,CBT-xBFMT薄膜的抗击穿场强Eb先增大后减小,在x=0.10处达到最大;最大极化强度Pm逐渐增加,在x=0.10处极化强度差最大;最大抗击穿场强和最大极化强度差的共同作用使CBT-0.10BFMT薄膜具有最佳储能特性,有效储能密度Wrec和储能效率η分别为82.8 J/cm3和78.3％,且储能稳定性(25～150 ℃)良好.CBT-0.10BFMT铁电薄膜有望应用于环境友好型小型能量储存器件.
Abstract
(1-x)CaBi4Ti4O15-xBi(Fe0.93Mn0.05Ti0.02)O3(CBT-xBFMT,x=0,0.05,0.10,0.15)solid solution films were successfully prepared on Pt(111)/TiO2/SiO2/Si substrates using metal organic decomposition combined with spin coating technology.And the energy storage properties of CBT thin films were systematically studied by X-ray diffractometer,field emission scanning electron microscope,ferroelectric analyzer and impedance analyzer.The results show that the prepared films all exhibit a polycrystalline bismuth layered structure without other phase formation.The addition of BFMT into thin film obviously enhances the maximum polarization strength Pm and breakdown field strength Eb,reduces the leakage current density.With the increase of BFMT solid solution,the breakdown field strength Eb of CBT-xBFMT film increases first and then decreases,and reaches the maximum value at x=0.10.The maximum polarization strength Pm gradually increases,and the largest polarization strength difference is obtained at x=0.10.The largest polarization intensity difference and breakdown field strength make CBT-0.10BFMT film has the best energy storage properties.The recoverable energy storage density Wrec and energy storage efficiency η of CBT-0.10BFMT film are up to 82.8 J/cm3 and 78.3％,respectively.And its energy storage characteristic has good temperature stability in the temperature range of 25～150 ℃.Therefore,CBT-0.10BFMT ferroelectric film is expected to be used in environmentally friendly micro energy storage devices.
关键词
CaBi4Ti4O15薄膜/固溶体/介电储能/击穿场强/极化强度差/高温Key words
CaBi4Ti4O15 thin film/solid solution/dielectric energy storage/electric breakdown field/polarization intensity difference/high temperature引用本文复制引用
基金项目
国家自然科学基金面上项目(51972144)
山东省重点研发计划(2022CXPT045)
济南市"高校20条"项目(T202009)
出版年
2024
国家科技期刊平台
NSTL
万方数据