Enhanced dielectric properties and energy density of flexible KTa0.2Nb0.8O3-BaTiO3/P(VDF-TrFE-CTFE) nanocomposite

  • Zhao Zhang
  • Hui Yang
  • Hao Wang
  • Xingeng Ding
  • Qilong ZhangEmail author
  • Zhicai Zhu


In this work, KTa0.2Nb0.8O3–BaTiO3 (KTN–BT) hybrid nanoparticles were synthesized via a facile one-pot hydrothermal method. Flexible nanocomposite films comprised of poly (vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) P(VDF-TrFE-CTFE) matrix and KTN–BT hybrid fillers of different molar ratio were prepared by solution-casting. It is revealed that the introduction of BT to the KTN causes decreased grain size and homogenous morphology, improving the dielectric constant, breakdown strengthen and energy density of nanocomposite films. Typically, the nanocomposite film containing 40 vol% KTN–BT possesses a dielectric constant of 322 at 100 Hz, which is 8.7 times than that of pure polymer. Also, nanocomposite film with < 10 vol% of filler could achieve high breakdown strength of over 300 MV m−1. The energy density of the film containing 2 vol% KTN–BT filler is 61.4% higher than that of pure P(VDF-TrFE-CTFE) polymer. (7.1 J cm−3 compared to 4.4 J cm−3.) In addition, the nanocomposites also displayed good flexibility and kept excellent dielectric properties after bending and folding. All the improved performance enables these composites to meet the requirements of many flexible electronic devices and energy storage devices.



The authors gratefully acknowledge the financial support from the National Key R&D Program of China (Grant No. 2016YFB0401501), National Natural Science Foundation of China (Grant No. 51772267), and the Key R&D Program of Zhejiang Province (Grant No. 2018C01042).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Zhao Zhang
    • 1
  • Hui Yang
    • 1
  • Hao Wang
    • 1
  • Xingeng Ding
    • 1
  • Qilong Zhang
    • 1
    Email author
  • Zhicai Zhu
    • 1
  1. 1.School of Materials Science and Engineering, State Key Lab Silicon MatZhejiang UniversityHangzhouPeople’s Republic of China

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