Tailoring Dielectric Properties and Energy Density of Ferroelectric Polymer Nanocomposites by High-k Nanowires.

High dielectric constant (k) polymer nanocomposites have shown great potential in dielectric and energy storage applications in the past few decades. The introduction of high-k nanomaterials into ferroelectric polymers has proven to be a promising strategy for the fabrication of high-k nanocomposites. One-dimensional large-aspect-ratio nanowires exhibit superiority in enhancing k values and energy density of polymer nanocomposites in comparison to their spherical counterparts. However, the impact of their intrinsic properties on the dielectric properties of polymer nanocomposites has been seldom investigated. Herein, four kinds of nanowires (Na2Ti3O7, TiO2, BaTiO3, and SrTiO3) with different inherent characteristics are elaborately selected to fabricate high-k ferroelectric polymer nanocomposites. Dopamine functionalization facilitates the excellent dispersion of these nanowires in the ferroelectric polymer matrix because of the strong polymer/nanowire interfacial adhesion. A thorough comparative study on the dielectric properties and energy storage capability of the nanowires-based nanocomposites has been presented. The results reveal that, among the four types of nanowires, BaTiO3 NWs show the best potential in improving the energy storage capability of the proposed nanocomposites, resulting from the most signficant increase of k while retaining the rather low dielectric loss and leakage current.

[1]  M. Tian,et al.  Enhanced dielectric properties and actuated strain of elastomer composites with dopamine-induced surface functionalization , 2013 .

[2]  Xingyi Huang,et al.  Energy storage in ferroelectric polymer nanocomposites filled with core-shell structured polymer@BaTiO3 nanoparticles: understanding the role of polymer shells in the interfacial regions. , 2014, ACS applied materials & interfaces.

[3]  A. Mellinger,et al.  Ferroelectric barium titanate nanocubes as capacitive building blocks for energy storage applications. , 2014, ACS applied materials & interfaces.

[4]  J. Zhai,et al.  Improving the dielectric constant and energy density of poly(vinylidene fluoride) composites induced by surface-modified SrTiO3 nanofibers by polyvinylpyrrolidone , 2015 .

[5]  J. Perry,et al.  Surface-initiated polymerization from barium titanate nanoparticles for hybrid dielectric capacitors. , 2014, ACS applied materials & interfaces.

[6]  Zhai Jiwei,et al.  Enhanced energy storage density in poly(vinylidene fluoride) nanocomposites by a small loading of suface-hydroxylated Ba0.6Sr0.4TiO3 nanofibers. , 2014, ACS applied materials & interfaces.

[7]  Guangzu Zhang,et al.  Solution-processed ferroelectric terpolymer nanocomposites with high breakdown strength and energy density utilizing boron nitride nanosheets , 2015 .

[8]  Shengtao Li,et al.  Fabrication and Dielectric Characterization of Advanced BaTiO3/Polyimide Nanocomposite Films with High Thermal Stability , 2008 .

[9]  H. Ploehn,et al.  Converting an Electrical Insulator into a Dielectric Capacitor: End- Capping Polystyrene with Oligoaniline , 2013 .

[10]  Xin Zhou,et al.  A Dielectric Polymer with High Electric Energy Density and Fast Discharge Speed , 2006, Science.

[11]  Juhwan Kim,et al.  Controlled charge transport by polymer blend dielectrics in top-gate organic field-effect transistors for low-voltage-operating complementary circuits. , 2012, ACS applied materials & interfaces.

[12]  Min Zhang,et al.  A hybrid fibers based wearable fabric piezoelectric nanogenerator for energy harvesting application , 2015 .

[13]  Qing Wang,et al.  High Energy and Power Density Capacitors from Solution‐Processed Ternary Ferroelectric Polymer Nanocomposites , 2014, Advanced materials.

[14]  F. Xia,et al.  An all-organic composite actuator material with a high dielectric constant , 2002, Nature.

[15]  Xingyi Huang,et al.  Core@Double-Shell Structured BaTiO3–Polymer Nanocomposites with High Dielectric Constant and Low Dielectric Loss for Energy Storage Application , 2013 .

[16]  L. Schadler,et al.  Influence of nanoparticle surface modification on the electrical behaviour of polyethylene nanocomposites , 2005 .

[17]  Haixiong Tang,et al.  Ultra high energy density nanocomposite capacitors with fast discharge using Ba0.2Sr0.8TiO3 nanowires. , 2013, Nano letters.

[18]  Ming-Jen Pan,et al.  High energy density nanocomposites based on surface-modified BaTiO(3) and a ferroelectric polymer. , 2009, ACS nano.

[19]  Xingyi Huang,et al.  Fluoro-polymer functionalized graphene for flexible ferroelectric polymer-based high-k nanocomposites with suppressed dielectric loss and low percolation threshold. , 2014, Nanoscale.

[20]  H. Sodano,et al.  High energy density nanocomposite capacitors using non-ferroelectric nanowires , 2013 .

[21]  Qinghua Zhang,et al.  Ultrahigh Energy Density of Polymer Nanocomposites Containing BaTiO3@TiO2 Nanofibers by Atomic‐Scale Interface Engineering , 2015, Advanced materials.

[22]  Z. Dang,et al.  Significantly enhanced low-frequency dielectric permittivity in the BaTiO3/poly (vinylidene fluoride) nanocomposite , 2007 .

[23]  Xingyi Huang,et al.  Core-shell structured poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization: a route to high dielectric constant materials with the inherent low loss of the base polymer , 2011 .

[24]  Xingyi Huang,et al.  “Grafting to” route to PVDF-HFP-GMA/BaTiO3 nanocomposites with high dielectric constant and high thermal conductivity for energy storage and thermal management applications , 2014 .

[25]  Xingyi Huang,et al.  Core-shell structured hyperbranched aromatic polyamide/BaTiO3 hybrid filler for poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) nanocomposites with the dielectric constant comparable to that of percolative composites. , 2013, ACS applied materials & interfaces.

[26]  Xingyi Huang,et al.  Electrical properties of epoxy/POSS composites with homogeneous nanostructure , 2014, IEEE Transactions on Dielectrics and Electrical Insulation.

[27]  Yang Shen,et al.  Largely enhanced energy density in flexible P(VDF-TrFE) nanocomposites by surface-modified electrospun BaSrTiO3 fibers , 2013 .

[28]  Xingyi Huang,et al.  Core-shell structured polystyrene/BaTiO3 hybrid nanodielectrics prepared by in situ RAFT polymerization: a route to high dielectric constant and low loss materials with weak frequency dependence. , 2012, Macromolecular rapid communications.

[29]  H. Sodano,et al.  Relationship between BaTiO₃ nanowire aspect ratio and the dielectric permittivity of nanocomposites. , 2014, ACS applied materials & interfaces.

[30]  Milind D. Arbatti,et al.  Ceramic–Polymer Composites with High Dielectric Constant , 2007 .

[31]  Bernard Kippelen,et al.  Solution-processible high-permittivity nanocomposite gate insulators for organic field-effect transistors , 2008 .

[32]  L. Schadler,et al.  Dielectric constant and breakdown strength of polymer composites with high aspect ratio fillers studied by finite element models , 2013 .

[33]  Sang Il Seok,et al.  Electrical Energy Storage in Ferroelectric Polymer Nanocomposites Containing Surface-Functionalized BaTiO3 Nanoparticles , 2008 .

[34]  Z. Dang,et al.  Flexible Nanodielectric Materials with High Permittivity for Power Energy Storage , 2013, Advanced materials.

[35]  Xingyi Huang,et al.  Core–Shell Structured High‐k Polymer Nanocomposites for Energy Storage and Dielectric Applications , 2015, Advanced materials.

[36]  Shengtao Li,et al.  Fundamentals, processes and applications of high-permittivity polymer–matrix composites , 2012 .

[37]  R. Linhardt,et al.  Effect of high aspect ratio filler on dielectric properties of polymer composites: a study on barium titanate fibers and graphene platelets , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[38]  Yang Shen,et al.  Significant enhancement in energy density of polymer composites induced by dopamine-modified Ba0.6Sr0.4TiO3 nanofibers , 2012 .

[39]  Xingyi Huang,et al.  Fluoro-Polymer@BaTiO3 Hybrid Nanoparticles Prepared via RAFT Polymerization: Toward Ferroelectric Polymer Nanocomposites with High Dielectric Constant and Low Dielectric Loss for Energy Storage Application , 2013 .

[40]  C. Zhi,et al.  Core-satellite Ag@BaTiO3 nanoassemblies for fabrication of polymer nanocomposites with high discharged energy density, high breakdown strength and low dielectric loss. , 2013, Physical chemistry chemical physics : PCCP.

[41]  C. Randall,et al.  High-and low-field dielectric characteristics of dielectrophoretically aligned ceramic/polymer nanocomposites , 2008 .

[42]  Yirong Lin,et al.  Enhanced Energy Storage in Nanocomposite Capacitors through Aligned PZT Nanowires by Uniaxial Strain Assembly , 2012 .

[43]  Stephen Ducharme,et al.  Electric energy density of dielectric nanocomposites , 2007 .

[44]  Haixiong Tang,et al.  Synthesis of High Aspect Ratio BaTiO3 Nanowires for High Energy Density Nanocomposite Capacitors , 2013 .

[45]  Yang Shen,et al.  Enhanced dielectric and ferroelectric properties induced by dopamine-modified BaTiO3 nanofibers in flexible poly(vinylidene fluoride-trifluoroethylene) nanocomposites , 2012 .

[46]  Bin Zhao,et al.  Phase and morphological transitions of titania/titanate nanostructures from an acid to an alkali hydrothermal environment , 2013 .

[47]  Gopalan Srinivasan,et al.  Shape-Controlled Monocrystalline Ferroelectric Barium Titanate Nanostructures: From Nanotubes and Nanowires to Ordered Nanostructures , 2008 .

[48]  H. Chan,et al.  Ferroelectric and dielectric properties of sol-gel derived BaxSr1-xTiO3 thin films , 2003 .

[49]  Xingyi Huang,et al.  Combining RAFT polymerization and thiol-ene click reaction for core-shell structured polymer@BaTiO3 nanodielectrics with high dielectric constant, low dielectric loss, and high energy storage capability. , 2014, ACS applied materials & interfaces.

[50]  Xingyi Huang,et al.  Electrical, thermophysical and micromechanical properties of ethylene-vinyl acetate elastomer composites with surface modified BaTiO3 nanoparticles , 2009 .

[51]  Sang Il Seok,et al.  Nanocomposites of Ferroelectric Polymers with TiO2 Nanoparticles Exhibiting Significantly Enhanced Electrical Energy Density , 2009 .

[52]  Peter J. Hotchkiss,et al.  Phosphonic Acid‐Modified Barium Titanate Polymer Nanocomposites with High Permittivity and Dielectric Strength , 2007 .

[53]  Qing Wang,et al.  Electrical Storage in Poly(vinylidene fluoride) based Ferroelectric Polymers : Correlating Polymer Structure to Electrical Breakdown Strength , 2008 .

[54]  Kwi-Il Park,et al.  Lead-free BaTiO3 nanowires-based flexible nanocomposite generator. , 2014, Nanoscale.

[55]  Yang Shen,et al.  Improving the dielectric constants and breakdown strength of polymer composites: effects of the shape of the BaTiO3 nanoinclusions, surface modification and polymer matrix , 2012 .

[56]  Yang Shen,et al.  Topological‐Structure Modulated Polymer Nanocomposites Exhibiting Highly Enhanced Dielectric Strength and Energy Density , 2014 .

[57]  Lei Zhu,et al.  Novel Ferroelectric Polymers for High Energy Density and Low Loss Dielectrics , 2012 .

[58]  Tobin J Marks,et al.  High-k organic, inorganic, and hybrid dielectrics for low-voltage organic field-effect transistors. , 2010, Chemical reviews.

[59]  Jiao Yin,et al.  Sodium titanate nanotubes as negative electrode materials for sodium-ion capacitors. , 2012, ACS applied materials & interfaces.