High-Performance Triboelectric Nanogenerators Based on Electrospun Polyvinylidene Fluoride–Silver Nanowire Composite Nanofibers

Siuk Cheon, Hyungseok Kang, Han Kim, Youngin Son, Jun Young Lee, Hyeon Jin Shin, Sang Woo Kim, Jeong Ho Cho

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The preparation of ferroelectric polymer–metallic nanowire composite nanofiber triboelectric layers is described for use in high-performance triboelectric nanogenerators (TENGs). The electrospun polyvinylidene fluoride (PVDF)–silver nanowire (AgNW) composite and nylon nanofibers are utilized in the TENGs as the top and bottom triboelectric layers, respectively. The electrospinning process facilitates uniaxial stretching of the polymer chains, which enhances the formation of the highly oriented crystalline β-phase that forms the most polar crystalline phase of PVDF. The addition of AgNWs further promotes the β-phase crystal formation by introducing electrostatic interactions between the surface charges of the nanowires and the dipoles of the PVDF chains. The extent of β-phase formation and the resulting variations in the surface charge potential upon the addition of nanowires are systematically analyzed using X-ray diffraction (XRD) and Kelvin probe force microscopy techniques. The ability of trapping the induced tribocharges increases upon the addition of nanowires to the PVDF matrix. The enhanced surface charge potential and the charge trapping capabilities of the PVDF–AgNW composite nanofibers significantly enhance the TENG output performances. Finally, the mechanical stability of the electrospun nanofibers is dramatically enhanced while maintaining the TENG performances by applying thermal welding near the melting temperature of PVDF.

Original languageEnglish
Article number1703778
JournalAdvanced Functional Materials
Volume28
Issue number2
DOIs
Publication statusPublished - 2018 Jan 10

Fingerprint

vinylidene
Nanofibers
Nanowires
fluorides
nanowires
Surface charge
composite materials
Composite materials
trapping
Crystalline materials
Charge trapping
Nylon (trademark)
Mechanical stability
Nylons
Electrospinning
Coulomb interactions
welding
Silver
Stretching
Ferroelectric materials

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Cheon, Siuk ; Kang, Hyungseok ; Kim, Han ; Son, Youngin ; Lee, Jun Young ; Shin, Hyeon Jin ; Kim, Sang Woo ; Cho, Jeong Ho. / High-Performance Triboelectric Nanogenerators Based on Electrospun Polyvinylidene Fluoride–Silver Nanowire Composite Nanofibers. In: Advanced Functional Materials. 2018 ; Vol. 28, No. 2.
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High-Performance Triboelectric Nanogenerators Based on Electrospun Polyvinylidene Fluoride–Silver Nanowire Composite Nanofibers. / Cheon, Siuk; Kang, Hyungseok; Kim, Han; Son, Youngin; Lee, Jun Young; Shin, Hyeon Jin; Kim, Sang Woo; Cho, Jeong Ho.

In: Advanced Functional Materials, Vol. 28, No. 2, 1703778, 10.01.2018.

Research output: Contribution to journalArticle

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AU - Cheon, Siuk

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AU - Lee, Jun Young

AU - Shin, Hyeon Jin

AU - Kim, Sang Woo

AU - Cho, Jeong Ho

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AB - The preparation of ferroelectric polymer–metallic nanowire composite nanofiber triboelectric layers is described for use in high-performance triboelectric nanogenerators (TENGs). The electrospun polyvinylidene fluoride (PVDF)–silver nanowire (AgNW) composite and nylon nanofibers are utilized in the TENGs as the top and bottom triboelectric layers, respectively. The electrospinning process facilitates uniaxial stretching of the polymer chains, which enhances the formation of the highly oriented crystalline β-phase that forms the most polar crystalline phase of PVDF. The addition of AgNWs further promotes the β-phase crystal formation by introducing electrostatic interactions between the surface charges of the nanowires and the dipoles of the PVDF chains. The extent of β-phase formation and the resulting variations in the surface charge potential upon the addition of nanowires are systematically analyzed using X-ray diffraction (XRD) and Kelvin probe force microscopy techniques. The ability of trapping the induced tribocharges increases upon the addition of nanowires to the PVDF matrix. The enhanced surface charge potential and the charge trapping capabilities of the PVDF–AgNW composite nanofibers significantly enhance the TENG output performances. Finally, the mechanical stability of the electrospun nanofibers is dramatically enhanced while maintaining the TENG performances by applying thermal welding near the melting temperature of PVDF.

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