Core-shell structured polyethylene glycol functionalized graphene for energy-storage polymer dielectrics: Combined mechanical and dielectric performances

Li, Yuchao; Bi, Xueqing; Wang, Shuangshuang; Zhan, Yanhu; Liu, Hong-Yuan; Mai, Yiu‐Wing; Liao, Chengzhu; Lu, Zhouguang; Liao, Yaozu

doi:10.1016/j.compscitech.2020.108341

Cited by 22 publications

(7 citation statements)

References 38 publications

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“…Such structures can exhibit properties different than those of both materials. Using core-shell nanoparticles will aid in designing functional nanocomposites that can achieve multiple enhancements [ 126 , 127 ].…”

Section: Suggested Future Workmentioning

confidence: 99%

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

et al. 2020

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Polymer nanocomposites used in underground cables have been of great interest to researchers over the past 10 years. Their preparation and the dispersion of the nanoparticles through the polymer host matrix are the key factors leading to their enhanced dielectric properties. Their important dielectric properties are breakdown strength, permittivity, conductivity, dielectric loss, space charge accumulation, tracking, and erosion, and partial discharge. An overview of recent advances in polymer nanocomposites based on LDPE, HDPE, XLPE, and PVC is presented, focusing on their preparation and electrical properties.

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Section: Suggested Future Workmentioning

confidence: 99%

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

et al. 2020

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“…6,17 Several approaches have been proposed to restrain such longrange charge transport, including the spatial confined/ orientation distribution of fillers 18−20 and the fillers' surface modification by metal nanoparticles 21,22 or by electrical insulating layers. 23,24 Of particular significance is the insulating layer modification (typically in core−shell manner) owing to its good universality and effectiveness. Possible mechanisms behind this strategy are to prevent fillers' direct contact and interconnection to form conducive networks and to suppress electron hopping/charge carrier mobility and thus reduce current leakage and the electrical conductivity of composites.…”

Section: Introductionmentioning

confidence: 99%

“…In origin, the sharp dielectric loss increase in conductive nanofillers/polymer systems is ascribed to electric conduction rather than polarization. This can be further explained by the facilitated charge transport across the entire sample (through charge moving along closely associated conductive fillers). , Several approaches have been proposed to restrain such long-range charge transport, including the spatial confined/orientation distribution of fillers − and the fillers’ surface modification by metal nanoparticles , or by electrical insulating layers. , Of particular significance is the insulating layer modification (typically in core–shell manner) owing to its good universality and effectiveness. Possible mechanisms behind this strategy are to prevent fillers’ direct contact and interconnection to form conducive networks and to suppress electron hopping/charge carrier mobility and thus reduce current leakage and the electrical conductivity of composites .…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled MXene@Fluorographene Hybrid for High Dielectric Constant and Low Loss Ferroelectric Polymer Composite Films

Wang,

Yang,

et al. 2024

ACS Appl. Mater. Interfaces

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Modern electrical applications urgently need flexible polymer films with a high dielectric constant (ε r ) and low loss. Recently, the MXene-filled percolative composite has emerged as a potential material choice because of the promised high ε r . Nevertheless, the typically accompanied high dielectric loss hinders its applications. Herein, a facile and effective surface modification strategy of cladding Ti 3 C 2 T x MXene (T = F or O; FMX) with fluorographene (FG) via self-assembly is proposed. The obtained FMX@FG hybrid yields high ε r (up to 108 @1 kHz) and low loss (loss tangent tan δ = 1.16 @ 1 kHz) in a ferroelectric polymer composite at a low loading level (the equivalent of 1.5 wt % FMX), which is superior to its counterparts in our work (e.g., FMX: ε r = 104, tan δ = 10.71) and other studies. It is found that the FG layer outside FMX plays a critical role in both the high dielectric constant and low loss from experimental characterizations and finite element simulations. For one thing, FG with a high F/C ratio would induce a favorable structure of high β-phase crystallinity, extensive microcapacitor networks, and abundant interfacial dipoles in polymer composites that account for the high ε r . For another, FG, as a highly insulating layer, can inhibit the formation of conductive networks and inter-FMX electron tunneling, which is responsible for conduction loss. The results demonstrate the potential of a self-assembled FMX@FG hybrid for high ε r and low loss polymer composite films and offer a new strategy for designing advanced polymer composite dielectrics.

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“…Much research on BaTiO 3 /polymer nanocomposites still faces the problems of filler agglomerations due to high surface energy, which would easily bring electric field distortion. Fortunately, this unfavorable condition can be relieved by precisely designing core–shell structures using inorganic or organic shells. , In these studies, much considerable attention was paid to enhance the polarization of dielectrics for improved energy storage properties by tuning the type and distribution of dipolar groups using organic shells. , The core–shell structures with dipolar groups are also prepared via grafting the inorganic filler particles with polymer chains to reduce dielectric loss. For instance, Chen et al modulated the polymerization degree of a rigid fluoropolymer to thus acquire the accurate interfacial properties of BaTiO 3 -derived polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, this unfavorable condition can be relieved by precisely designing core−shell structures using inorganic or organic shells. 12,13 In these studies, much considerable attention was paid to enhance the polarization of dielectrics for improved energy storage properties by tuning the type and distribution of dipolar groups using organic shells. 14,15 The core−shell structures with dipolar groups are also prepared via grafting the inorganic filler particles with polymer chains to reduce dielectric loss.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Interfacial and Dielectric Performance for Polyetherimide Nanocomposites through Tailoring Shell Polarities

Zuo

Jiang

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Polyimide (PI) and its derivative polyetherimide (PEI) have been widely investigated as promising candidates for dielectric energy storage due to their excellent intrinsic features. However, most of the current research for PI- or PEI-based dielectric nanocomposites only focuses on a certain polar group contained in a dianhydride monomer, while there are very few studies on exploring the effect of a series of polar groups derived from various dianhydride monomers on the dielectric properties of nanocomposites. To fill this gap, we herein fabricated and investigated a series of novel hyperbranched polyimides grafted on barium titanate nanoparticles (HBPI@BT) using different dianhydride monomers and their nanocomposites with the PEI matrix. The results showed that sophisticated hyperbranched structures effectively alleviated the incompatibility between fillers and the matrix, thus significantly improving the bonding energy of nanocomposites, especially for HBPI-S@BT/PEI (797.7 kJ/mol). The U d of HBPI-S@BT/PEI reached 8.38 J/cm3, which is 3.3 times higher than that of pure PEI. The HBPI-F@BT/PEI nanocomposites achieved high breakdown strength (∼500 MV/m) and low dielectric loss (0.008) simultaneously. The dielectric constants of HBPI@BT/PEI nanocomposites remained at a stable level from 25 to 150 °C. This work provides us promising hyperbranched structured materials for potentially advanced dielectric applications such as field effect transistors.

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Core-shell structured polyethylene glycol functionalized graphene for energy-storage polymer dielectrics: Combined mechanical and dielectric performances

Cited by 22 publications

References 38 publications

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

Recent Advances in Polymer Nanocomposites Based on Polyethylene and Polyvinylchloride for Power Cables

Self-Assembled MXene@Fluorographene Hybrid for High Dielectric Constant and Low Loss Ferroelectric Polymer Composite Films

Enhanced Interfacial and Dielectric Performance for Polyetherimide Nanocomposites through Tailoring Shell Polarities

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