(Na,K)NbO3 nanoparticle-embedded piezoelectric nanofiber composites for flexible nanogenerators

Han Byul Kang, Chan Su Han, Jae Chul Pyun, Won Hyoung Ryu, Chong Yun Kang, Yong Soo Cho

Research output: Contribution to journalArticlepeer-review

91 Citations (Scopus)


Piezoelectric composite nanofibers based on (Na0.5,K0.5)NbO3 (NKN) nanoparticles embedded in poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] polymer are investigated in terms of their performance as nanogenerators. Perovskite NKN nanoparticles with ~30-105nm were separately prepared by combustion synthesis using polyacrylic acid (PAA) as a fuel. Surface modification of nanoparticles by tetradecylphosphonic acid (TDPA) was essential to secure proper adhesion with the polymer in the nanofibers prepared by electrospinning. Location-dependent piezoelectricity measurements confirmed that the region of embedded NKN filler particles exhibited better piezoelectricity than the P(VDF-TrFE) matrix region. Energy harvesting performance of the flexible composite nanogenerator demonstrated ~0.98V output voltage and ~78nA output current, which were enhanced depending on the volume fraction of the NKN nanoparticles dispersed in the polymer.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalComposites Science and Technology
Publication statusPublished - 2015 May 6
Externally publishedYes


  • A. Functional composites
  • A. Nanocomposites
  • B. Electrical properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)


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