Mechanical and piezoelectric properties of surface modified (Na,K)NbO3-based nanoparticle-embedded piezoelectric polymer composite nanofibers for flexible piezoelectric nanogenerators

Seung Rok Kim, Ju Hyun Yoo, Ji Ho Kim, Yong Soo Cho, Jin Woo Park

Research output: Contribution to journalArticlepeer-review

Abstract

The degree of transformation from mechanical to electrical energy by flexible piezoelectric nanogenerators (f-PNGs) to power wearable electronics can be significantly enhanced through the synergy between piezoelectric ceramic nanoparticles (PCNPs) and flexible piezoelectric polymers. In this study, we investigated the mechanical and piezoelectric properties of composite nanofibers (c-NFs) of lead-free (Na, K)(Nb, Sb)O3-BaZnO3-(Bi, K)ZrO3 (NKNS-BZ-BKZ) PCNPs embedded in a poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) matrix. A significant reduction in the agglomerate size of the PCNPs and their enhanced interfacial adhesion with the P(VDF-TrFE) matrix were achieved through a tetradecylphosphonic acid (TDPA) surface treatment of the PCNPs. The uniform distribution of the embedded PCNPs made the web of c-NFs have a highly negative relative surface potential and a high effective modulus of approximately 170 MPa. Consequently, the f-PNG with the TDPA surface-treated PCNPs maintained an open-circuit voltage, a high maximum generated power, and an output voltage of approximately 12.2 V, 33.2 nW, and 1.25 V, respectively, despite being bent for 10,000 cycles at a bending radius (r) of 15 mm.

Original languageEnglish
Article number105445
JournalNano Energy
Volume79
DOIs
Publication statusPublished - 2021 Jan

Bibliographical note

Funding Information:
This research was supported by the Industrial Strategic Technology Development Program ( #10079981 ) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (grant number: 2018R1A2B6001390 ).

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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