(Na,K)NbO sub(3) nanoparticle-embedded piezoelectric nanofiber composites for flexible nanogenerators

Piezoelectric composite nanofibers based on (Na sub(0.5)K sub(0.5))NbO sub(3) (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 ~30-105 nm were separate...

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Bibliographic Details
Published in:Composites science and technology 2015-01, Vol.111, p.1-8
Main Authors: Kang, Han Byul, Han, Chan Su, Pyun, Jae Chul, Ryu, Won Hyoung, Kang, Chong-Yun, Cho, Yong Soo
Format: Article
Language:English
Subjects:
Combustion synthesis
Electric potential
Electric power generation
Electrospinning
Nanoparticles
Nanostructure
Nanotechnology
Piezoelectricity
Polymer matrix composites
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Summary:Piezoelectric composite nanofibers based on (Na sub(0.5)K sub(0.5))NbO sub(3) (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 ~30-105 nm were separately prepared by combustion synthesis using polyacrylic acid (PAA) as a fuel. Surface modification of nanoparticles by tetradecylphosphomc 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 ~0.98 V output voltage and ~78 nA output current, which were enhanced depending on the volume fraction of the NKN nanoparticles dispersed in the polymer.
ISSN:0266-3538
DOI:10.1016/j.compscitech.2015.02.015