Enhancement of dielectric constant in polymer-ceramic nanocomposite for flexible electronics and energy storage applications

Kumar, Sunil; Supriya, Sweety; Kar, Manoranjan

doi:10.1016/j.compscitech.2018.01.025

Cited by 95 publications

(20 citation statements)

References 36 publications

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“…The calculated F(β) of the two-phase and three-phase nanocomposites wer 0.220 and 0.331, respectively. The negative charge of the Au nanoparticles causes an in crease in amount of the polar β-phase of the PVDF nanocomposites [44], leading to a Au TNR/PVDF nanocomposite with a significantly enhanced ε′ [45]. The FTIR spectra of the PVDF polymer nanocomposites filled with the TNRs and Au-TNRs are shown in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Gold-Nanoparticle-Deposited TiO2 Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance

et al. 2021

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Flexible dielectric polymer composites have been of great interest as embedded capacitor materials in the electronic industry. However, a polymer composite has a low relative dielectric permittivity (ε′ < 100), while its dielectric loss tangent is generally large (tanδ > 0.1). In this study, we fabricate a novel, high-permittivity polymer nanocomposite system with a low tanδ. The nanocomposite system comprises poly(vinylidene fluoride) (PVDF) co-filled with Au nanoparticles and semiconducting TiO2 nanorods (TNRs) that contain Ti3+ ions. To homogeneously disperse the conductive Au phase, the TNR surface was decorated with Au-NPs ~10–20 nm in size (Au-TNRs) using a modified Turkevich method. The polar β-PVDF phase was enhanced by the incorporation of the Au nanoparticles, partially contributing to the enhanced ε′ value. The introduction of the Au-TNRs in the PVDF matrix provided three-phase Au-TNR/PVDF nanocomposites with excellent dielectric properties (i.e., high ε′ ≈ 157 and low tanδ ≈ 0.05 at 1.8 vol% of Au and 47.4 vol% of TNRs). The ε′ of the three-phase Au-TNR/PVDF composite is ~2.4-times higher than that of the two-phase TNR/PVDF composite, clearly highlighting the primary contribution of the Au nanoparticles at similar filler loadings. The volume fraction dependence of ε′ is in close agreement with the effective medium percolation theory model. The significant enhancement in ε′ was primarily caused by interfacial polarization at the PVDF–conducting Au nanoparticle and PVDF–semiconducting TNR interfaces, as well as by the induced β-PVDF phase. A low tanδ was achieved due to the inhibited conducting pathway formed by direct Au nanoparticle contact.

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Section: Resultsmentioning

confidence: 99%

Gold-Nanoparticle-Deposited TiO2 Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance

et al. 2021

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“…Usually, the percolation threshold value of higher-dimensional nanofillers can be achieved easily in comparison to the lower-dimensional nanofillers using the same concentration . Various dimensional fillers like 0D (nanoparticles, NPs), ,− 1D (nanowires, NWs; ,,,, nanorods, NRs; , nanotubes, NTs; ,, nanofibers, NFs; − and nanobelts, NBs) , ), and 2D (nanosheets, NSs; and nanoplates, NPs) have been incorporated with polymers for enhancing the energy storage performance of nanocomposites.…”

Section: Types Of Capacitors Used For Energy Storagementioning

confidence: 99%

Polymer Matrix Nanocomposites with 1D Ceramic Nanofillers for Energy Storage Capacitor Applications

Zhang

Marwat

Xie

et al. 2019

ACS Appl. Mater. Interfaces

202

103

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Recent developments in various technologies, such as hybrid electric vehicles and pulsed power systems, have challenged researchers to discover affordable, compact, and super-functioning electric energy storage devices. Among the existing energy storage devices, polymer nanocomposite film capacitors are a preferred choice due to their high power density, fast charge and discharge speed, high operation voltage, and long service lifetime. In the past several years, they have been extensively researched worldwide, with 0D, 1D, and 2D nanofillers being incorporated into various polymer matrixes. However, 1D nanofillers appeared to be the most effective in producing large dipole moments, which leads to a considerably enhanced dielectric permittivity and energy density of the nanocomposite. As such, this Review focuses on recent advances in polymer matrix nanocomposites using various types of 1D nanofillers, i.e., linear, ferroelectric, paraelectric, and relaxor−ferroelectric for energy storage applications. Correspondingly, the latest developments in the nanocomposite dielectrics with highly oriented, surface-coated, and surface-decorated 1D nanofillers are presented. Special attention has been paid to identifying the underlying mechanisms of maximizing dielectric displacement, increasing dielectric breakdown strength, and enhancing the energy density. This Review also presents some suggestions for future research in low-loss, high energy storage devices.

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“…The peak at 760 cm À1 can be attributed to the wagging vibration of CF 2 groups, which relate to the phase whereas peak at 840 and 880 cm À1 can be attributed to the CF 2 stretching, which relates to phase. 16 It is observed that intensity of phase peak intensity increases with addition of ZnO nanorods compared to control PVDF filaments. The relative amount of phase has been calculated using the absorption intensity of phase at 840 cm À1 and phase at 760 cm À1 .…”

Section: Ftir Analysis Of Filamentsmentioning

confidence: 92%

Zinc oxide nanorod as effective reinforcing material for enhancing β phase crystal in poly(vinylidene fluoride) filaments

Panda¹,

Tambe²,

Thite³

2020

Journal of Composite Materials

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The present work is an attempt to demonstrate that incorporation of small amount of zinc oxide nanorods enhances the β crystal percentage, which is essential for improvement in piezo-electric performance of the poly(vinylidene fluoride) (PVDF) fiber. The zinc oxide nanorods were synthesized with aspect ratio of 26 and uniformly dispersed in PVDF by melt compounding process. Those compounded polymers were melt spun and subsequently cold drawn to obtain composite filaments. The effect of nanostructure, loading amount, melt draw ratio, cold draw ratio, and drawing temperature was investigated. The incorporation of nanorods resulted in 14% increase in β phase crystal content compared to control PVDF filaments. The β phase crystal content has been analyzed using the wide-angle X ray diffraction and FTIR spectroscopy. This increase in β phase crystal content was 10% more compared to circular zinc oxide nanoparticle reinforced PVDF composite filament. There was no significant change in mechanical properties of the composite filaments compared to the control PVDF filament.

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Enhancement of dielectric constant in polymer-ceramic nanocomposite for flexible electronics and energy storage applications

Cited by 95 publications

References 36 publications

Gold-Nanoparticle-Deposited TiO2 Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance

Gold-Nanoparticle-Deposited TiO2 Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance

Polymer Matrix Nanocomposites with 1D Ceramic Nanofillers for Energy Storage Capacitor Applications

Zinc oxide nanorod as effective reinforcing material for enhancing β phase crystal in poly(vinylidene fluoride) filaments

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