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立方体状SrTiO3粉体/聚偏氟乙烯电介质复合薄膜的储能性能

刘少辉 王娇 王菲菲 王远

刘少辉, 王娇, 王菲菲, 等. 立方体状SrTiO3粉体/聚偏氟乙烯电介质复合薄膜的储能性能[J]. 复合材料学报, 2023, 40(8): 4637-4647. doi: 10.13801/j.cnki.fhclxb.20221108.001
引用本文: 刘少辉, 王娇, 王菲菲, 等. 立方体状SrTiO3粉体/聚偏氟乙烯电介质复合薄膜的储能性能[J]. 复合材料学报, 2023, 40(8): 4637-4647. doi: 10.13801/j.cnki.fhclxb.20221108.001
LIU Shaohui, WANG Jiao, WANG Feifei, et al. Energy storage performance of cubic SrTiO3 powder/polyvinylidene fluoride dielectric composite films[J]. Acta Materiae Compositae Sinica, 2023, 40(8): 4637-4647. doi: 10.13801/j.cnki.fhclxb.20221108.001
Citation: LIU Shaohui, WANG Jiao, WANG Feifei, et al. Energy storage performance of cubic SrTiO3 powder/polyvinylidene fluoride dielectric composite films[J]. Acta Materiae Compositae Sinica, 2023, 40(8): 4637-4647. doi: 10.13801/j.cnki.fhclxb.20221108.001

立方体状SrTiO3粉体/聚偏氟乙烯电介质复合薄膜的储能性能

doi: 10.13801/j.cnki.fhclxb.20221108.001
基金项目: 国家自然科学基金项目(51902088);河南省高校科技创新人才项目(21HASTIT014);河南省优秀青年基金项目 (212300410031);河南省科技攻关计划项目(222102240004)
详细信息
    通讯作者:

    刘少辉,博士,副教授,硕士生导师,研究方向为复合材料 E-mail: qqliushaohui@163.com

  • 中图分类号: TB332

Energy storage performance of cubic SrTiO3 powder/polyvinylidene fluoride dielectric composite films

Funds: National Natural Science Foundation of China (51902088); Program for Science and Technology Innovation Talents in Universities of Henan Province (21HASTIT014); Excellent Youth Fund of Henan Natural Science Foundation (212300410031); Program for Tackling Key Problems in Science and Technology of Henan Province (222102240004)
  • 摘要: 高工作场强、高储能效率的电介质储能材料对提高电力设备的性能、减小电力设备体积具有重要影响。采用混合碱法制备出立方体状SrTiO3粉体作为陶瓷填料,采用聚乙烯吡咯烷酮(PVP)表面包覆改性对立方体状SrTiO3粉体进行表面处理,利用流延法制备出了均匀的聚偏氟乙烯(PVDF)电介质复合薄膜。系统研究了表面PVP包覆改性立方体状SrTiO3粉体对PVDF电介质复合薄膜介电性能和储能密度的影响。结果表明:混合碱法制备出的SrTiO3粉体的形貌为立方体状,尺寸为 200~400 nm,粒径分布比较均匀,PVP的官能团和立方体状SrTiO3粉体的表面建立起共价的相互作用,在立方体状SrTiO3粉体表面形成PVP包覆层,可以有效防止立方体状SrTiO3粉体在PVDF电介质复合薄膜中的团聚,同时PVP包覆层可以改善立方体状SrTiO3粉体在PVDF聚合物中分散和结合情况。PVDF电介质复合薄膜具有良好的介电性能和耐击穿性能,PVDF电介质复合薄膜的介电常数随着填充量的增加而增加,当立方体状SrTiO3粉体填充量为40vol%时,电介质复合薄膜的介电常数为34.9。PVDF电介质复合薄膜的储能密度随着填充量的增加而先增加后降低,当表面PVP包覆改性处理立方体状SrTiO3粉体的填充量为5vol%时,电介质复合薄膜的储能密度达5.3 J/cm3

     

  • 图  1  立方体状SrTiO3粉体和聚乙烯吡咯烷酮(PVP)表面包覆改性SrTiO3粉体的XRD图谱(插图为混合碱法制备SrTiO3粉体的SEM图像)

    Figure  1.  XRD patterns of cubic SrTiO3 powder and polyvinylpyrrolidone (PVP) surface modified SrTiO3 powder (SEM image of SrTiO3 powder prepared by mixed alkali method is shown in the inset)

    图  2  PVP、立方体状SrTiO3粉体和PVP表面包覆改性SrTiO3粉体的FTIR图谱

    Figure  2.  FTIR spectra of PVP, cubic SrTiO3 powder and PVP surface coated modified SrTiO3 powder

    图  3  (a)立方体状SrTiO3粉体和PVP表面包覆改性SrTiO3粉体的XPS全谱扫描图谱;(b) PVP表面改性前后的SrTiO3粉体的O1s元素的精细扫描图谱

    Figure  3.  (a) XPS of cubic SrTiO3 powder and PVP surface coated modified SrTiO3 powder; (b) Fine scanning spectra of O1s elements of SrTiO3 powder before and after PVP surface modification

    图  4  表面PVP包覆改性后SrTiO3粉体的TEM图像:(a) 低倍数;(b) 高倍数

    Figure  4.  TEM images of SrTiO3 powder after surface PVP modification:(a) Low magnifications; (b) High magnifications

    图  5  PVP 表面改性前后立方体状SrTiO3粉体的热失重曲线图

    Figure  5.  TG curves of cubic SrTiO3 powder and PVP surface coated modified SrTiO3 powder

    图  6  填充量为5vol%时聚偏氟乙烯(PVDF)电介质复合薄膜的SEM图像:(a) 未表面改性SrTiO3粉体/PVDF电介质复合薄膜;(b) PVP表面包覆改性SrTiO3粉体/PVDF电介质复合薄膜;(c) PVDF电介质复合薄膜

    Figure  6.  SEM images of polyvinylidene fluoride (PVDF) dielectric composite films at a concentration of 5vol%: (a) Unmodified SrTiO3 powder/PVDF composite films; (b) PVP surface modified SrTiO3 powder/PVDF dielectric composite films; (c) PVDF dielectric composite films

    图  7  (a)不同填充量PVP表面包覆改性SrTiO3粉体/PVDF电介质复合薄膜与未表面改性SrTiO3粉体/PVDF电介质复合薄膜的介电常数对比图;(b)两种PVDF电介质复合薄膜的介电损耗对比图

    Figure  7.  (a) Comparison of dielectric constants of PVP surface modified SrTiO3 powder/PVDF composite films and unmodified SrTiO3 powder/PVDF composite films with different filling amounts of fillers; (b) Comparison of dielectric loss of the PVDF composites films is shown in the inset

    图  8  不同填充量PVP表面包覆改性SrTiO3粉体/PVDF电介质复合薄膜与未表面改性SrTiO3粉体/PVDF电介质复合薄膜的耐击穿场强对比

    Figure  8.  Breakdown strength comparison of PVP surface modified SrTiO3 powder/PVDF composite films and unmodified SrTiO3 powder/PVDF composite films with different filling amount fillers

    图  9  PVP表面包覆改性SrTiO3粉体/PVDF电介质复合薄膜与未表面改性SrTiO3粉体/PVDF电介质复合薄膜的电场强度分布有限元模拟

    Figure  9.  Finite element simulation of electric field distribution of PVP surface modified SrTiO3 powder/PVDF composite films and unmodified SrTiO3 powder/PVDF composite films

    图  10  SrTiO3粉体/PVDF电介质复合薄膜内部电荷的分布示意图

    Figure  10.  Schematic diagram of internal charge distribution of SrTiO3 powder/PVDF composite films

    图  11  电场为1000 kV/cm时PVDF和不同填充浓度的PVDF电介质复合薄膜的极化强度-电场(P-E)曲线

    Figure  11.  Polarization-electric field (P-E) curves of PVDF and PVDF dielectric composites films with different filling concentrations under 1000 kV/cm

    图  12  (a) 不同组分PVDF电解质薄膜最大击穿电场下的P-E曲线图;(b) PVDF和不同填充浓度表面包覆改性SrTiO3粉体/PVDF电介质复合薄膜的储能密度变化曲线

    Figure  12.  (a) P-E curves of PVDF composites films with different filling concentrations under maximum breakdown field; (b) Energy storage density for PVDF and PVDF composites films with different filling amounts of surface-coated with modified SrTiO3 powder

    图  13  SrTiO3粉体填充量为5vol%时未处理表面改性SrTiO3粉体/PVDF电介质复合薄膜和PVP改性SrTiO3粉体/PVDF电介质复合薄膜的储能密度和放电效率曲线关系

    Figure  13.  Energy storage density and discharge efficiency of untreated SrTiO3 powder/PVDF composite films and PVP modified SrTiO3 powder/PVDF composite films at a concentration of 5vol%

    图  14  5vol%PVP改性SrTiO3粉体/PVDF电介质复合薄膜在不同测试频率下的P-E曲线

    Figure  14.  P-E curves of PVP modified SrTiO3 powder/PVDF composite films at a concentration of 5vol%

    表  1  前期文献报道钛酸锶钡陶瓷/PVDF复合材料的储能密度与本文实验结果对比

    Table  1.   Comparison of the energy storage density of PVDF-based composites and the experimental results in this work

    MaterialSurface modification
    method
    Energy storage density/
    (J·cm–3)
    Ref.
    BaTiO3/Poly(vinylidene fluoride-hexafluoropropylene) filmsAminomethyl phosphonic acid3.20[24]
    SrTiO3/PVDF films3.54[25]
    BaTiO3/Poly(vinylidene fluoride-hexafluoropropylene) composite films4.89[26]
    SrTiO3/PVDF filmsPolyvinylpyrrolidone5.30This work
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  • 收稿日期:  2022-09-08
  • 修回日期:  2022-10-18
  • 录用日期:  2022-10-25
  • 网络出版日期:  2022-11-08
  • 刊出日期:  2023-08-15

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