Advancing Dielectric and Ferroelectric Properties of Piezoelectric Polymers by Combining Graphene and Ferroelectric Ceramic Additives for Energy Storage Applications

Materials
Saira IshaqDusan Losic

Abstract

To address the limitations of piezoelectric polymers which have a low dielectric constant andto improve their dielectric and ferroelectric efficiency for energy storage applications, we designed and characterized a new hybrid composite that contains polyvinylidene fluoride as a dielectric polymer matrix combined with graphene platelets as a conductive and barium titanite as ceramic ferroelectric fillers. Different graphene/barium titanate/polyvinylidene fluoride nanocomposite films were synthesized by changing the concentration of graphene and barium titanate to explore the impact of each component and their potential synergetic effect on dielectric and ferroelectric properties of the composite. Results showed that with an increase in the barium titanate fraction, dielectric efficiency ofthe nanocomposite was improved. Among all synthesized nanocomposite films, graphene/barium titanate/polyvinylidene fluoride nanocomposite in the weight ratio of 0.15:0.5:1 exhibited thehighest dielectric constant of 199 at 40 Hz, i.e., 15 fold greater than that of neat polyvinylidene fluoride film at the same frequency, and possessed a low loss tangent of 0.6. However, AC conductivity and ferroelectric properties of graphene/barium titanate/pol...Continue Reading

References

Aug 1, 1996·Physical Review. B, Condensed Matter·M H Frey, D A Payne
Feb 21, 2008·Nano Letters·Alexander A BalandinChun Ning Lau
Aug 25, 2010·ACS Nano·Daniela C MarcanoJames M Tour
Dec 8, 2010·Nanotechnology·Haixiong TangHenry A Sodano
Sep 12, 2015·Colloids and Surfaces. B, Biointerfaces·Clarisse RibeiroSenentxu Lanceros-Méndez

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Citations

Jul 29, 2020·Materials·Sonia Kudłacik-KramarczykBożena Tyliszczak

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Methods Mentioned

BETA
scanning electron microscopy
X-ray

Software Mentioned

GBP
IV
LabSpec

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