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    Influence of stacking morphology and edge nitrogen doping on the dielectric performance of graphene-polymer nanocomposites

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    Type
    Article
    Authors
    Almadhoun, Mahmoud N.
    Hedhili, Mohamed N. cc
    Odeh, Ihab N.
    Xavier, Prince
    Bhansali, Unnat Sampatraj
    Alshareef, Husam N. cc
    KAUST Department
    Core Labs
    Functional Nanomaterials and Devices Research Group
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    SABIC - Corporate Research and Innovation Center (CRI) at KAUST
    Date
    2014-05
    Online Publication Date
    2014-05
    Print Publication Date
    2014-05-13
    Permanent link to this record
    http://hdl.handle.net/10754/563546
    
    Metadata
    Show full item record
    Abstract
    We demonstrate that functional groups obtained by varying the preparation route of reduced graphene oxide (rGO) highly influence filler morphology and the overall dielectric performance of rGO-relaxor ferroelectric polymer nanocomposite. Specifically, we show that nitrogen-doping by hydrazine along the edges of reduced graphene oxide embedded in poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) results in a dielectric permittivity above 10 000 while maintaining a dielectric loss below 2. This is one of the best-reported dielectric constant/dielectric loss performance values. In contrast, rGO produced by the hydrothermal reduction route shows a much lower enhancement, reaching a maximum dielectric permittivity of 900. Furthermore, functional derivatives present in rGO are found to strongly affect the quality of dispersion and the resultant percolation threshold at low loading levels. However, high leakage currents and lowered breakdown voltages offset the advantages of increased capacitance in these ultrahigh-k systems, resulting in no significant improvement in stored energy density. © 2014 American Chemical Society.
    Citation
    Almadhoun, M. N., Hedhili, M. N., Odeh, I. N., Xavier, P., Bhansali, U. S., & Alshareef, H. N. (2014). Influence of Stacking Morphology and Edge Nitrogen Doping on the Dielectric Performance of Graphene–Polymer Nanocomposites. Chemistry of Materials, 26(9), 2856–2861. doi:10.1021/cm5004565
    Sponsors
    H.N.A. acknowledges the financial support from the Saudi Basic Industries Corporation (SABIC) Grant No. 2000000015.
    Publisher
    American Chemical Society (ACS)
    Journal
    Chemistry of Materials
    DOI
    10.1021/cm5004565
    ae974a485f413a2113503eed53cd6c53
    10.1021/cm5004565
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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