2D filler-reinforced polymer nanocomposite dielectrics for high-k dielectric and energy storage applications

Hu, Jin; Zhang, Shufen; Tang, Bingtao

doi:10.1016/j.ensm.2020.10.001

Cited by 121 publications

(55 citation statements)

References 177 publications

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“…An electron trap would be formed at the interface between adjacent layers in the sandwich-structured nanocomposites, and the trapped electrons would gather at the region of the interface, which will enhance the interfacial polarization, resulting in increased permittivity . In addition, the interfacial polarization between the KN nanosheets and the PVDF matrix is conducive to increasing the dielectric constant of the nanocomposite, which plays a dominant role in the low-frequency range . As the frequency increases, the interface polarization gradually weakens, so the dielectric constant shows a trend of decrease.…”

Section: Resultsmentioning

confidence: 99%

“…Constructing a multi-scale interface and a topological structure (i.e., a multilayer structure) is proven to be an effective strategy for increasing energy storage density using the interface polarization and interface barrier effects to improve electrical polarization and breakdown strength. ,, For instance, BaTiO 3 nanowires were introduced into PVDF to fabricate polymer-based nanocomposites with sandwiched structures. Due to the contribution of the interface polarization and the barrier effect between the layers, the multilayer-structured BaTiO 3 /PVDF nanocomposite exhibited enhanced polarization and electrical breakdown strength and suppressed leakage current density .…”

Section: Introductionmentioning

confidence: 99%

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Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Liu

Luo

Zhai

et al. 2021

ACS Sustainable Chem. Eng.

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The low energy density of polymer-based dielectrics greatly limits their application in electronic components. Constructing composites with two-dimensional ceramic fillers is considered an effective strategy to increase the energy density of dielectrics because they are easily vertically distributed to the direction of the electric field. For the first time, two-dimensional KNbO 3 (KN) nanosheets with an average thickness of ∼72 nm are synthesized and applied in poly(vinylidene fluoride) (PVDF)-based dielectrics for energy storage application. Two kinds of symmetric trilayer structures including x-0-x and 0-x-0 are designed by taking advantage of interfacial polarization and the suppression of electron injection, where the number x represents the volume fraction of KN nanosheets and 0 represents pure PVDF. The results show that a 0-1-0 structured nanocomposite film with a very low loading of 1 vol % KN nanosheets achieves a high discharge energy density of 19.97 J cm −3 at 539 kV mm −1 , which is ∼109% higher than that of pure PVDF (9.56 J cm −3 at 420 kV mm −1 ). Finite element analysis (FEA) is carried out to estimate the electric field distributions in the symmetric trilayer dielectrics, confirming a consistent rule with the experimental results. This work provides guidance for designing trilayer structured dielectrics with high energy density.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Liu

Luo

Zhai

et al. 2021

ACS Sustainable Chem. Eng.

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“…Usually, three types of nanoparticles have been widely used to improve the dielectric and energy storage properties of polymer-based nanocomposites 19 : (i) 0D spherical fillers such as silicon dioxide (SiO 2 ), magnesium oxide (MgO), zirconium dioxide (ZrO 2 ) and barium titanate (BT) 20 ; (ii) 1D fillers such as titanium dioxide (TiO 2 ), BT and barium strontium titanate (BST) nanowires and/or nanofibers 21,22 ; (iii) 2D fillers such as graphene oxide (GO), boron nitride (BN), Al 2 O 3 , and organic montmorillonite nanoplatelets. 23,24 According to previous studies, 2D nanofillers commonly behaved much better enhancing effect for the energy storage ability. [25][26][27] Furthermore, among all the 2D nanomaterials, organic montmorillonite (org-MMT) belongs to the cost-effective and efficient modifier for the preparation of dielectric nanocomposites.…”

mentioning

confidence: 93%

Effect of organic Na⁺‐montmorillonite on the dielectric and energy storage properties of polypropylene nanocomposites with polypropylene‐graft‐maleic anhydride as compatibilizer

Zhao

Xie

et al. 2021

J of Applied Polymer Sci

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Polymer-based dielectrics with excellent energy storage properties are highly desirable as electrical energy storage materials for advanced electronics and electrical power. However, the most maturely commercial film capacitor, biaxially oriented polypropylene (PP), is limited to a wider range of applications due to its low energy storage density. Herein, a one-step melt blending method was utilized to prepare PP-based nanocomposites to improve the energy storage performance of PP. Polypropylene-graft-maleic anhydride (PP-g-MAH) was used as a polar compatibilizer to promote the uniform dispersion of organic Na + -montmorillonite (org-MMT) in the PP matrix. Furthermore, the introduction of PP-g-MAH improved the dielectric constant of PP nanocomposites and increased charge traps. The org-MMT enhanced the crystallinity and reduced the crystal size of PP. On the other hand, the layered structure of org-MMT inhibited electric tree branching and growth. The PPbased nanocomposites possess a relatively high dielectric constant of 3.35 and an extremely low dielectric loss of 0.0012 at 1000 Hz. The PP/PP-g-MAH/org-MMT nanocomposite with an optimized org-MMT content (0.2 wt%) exhibited a discharged energy density of 5.2 J/cm 3 at the electric field of 500 MV/m with a superior charge-discharge efficiency of 93.5%, which were favorable for its application as film capacitor materials.

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“…[ 16,17 ] Among them, 2D fillers have obvious advantages of alleviating the agglomeration of fillers and forming conduction barriers in polymer‐based composites, attributed to the large lateral size and aspect ratio. [ 18,19 ] Thus, introducing 2D inorganic fillers into polymer provides a more robust way to enhance the energy storage density ( U ) of composites.…”

Section: Introductionmentioning

confidence: 99%

2–2 Type PVDF‐Based Composites Interlayered by Epitaxial (111)‐Oriented BTO Films for High Energy Storage Density

Tian

Peng

et al. 2021

Adv Funct Materials

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Quick charge/discharge polymer‐based composites filled with inorganic nanosheets have attracted extensive attention and provided a more efficient way to achieve high energy storage density (U) because of the alleviated agglomeration of fillers and the formation of conduction barriers. However, conductive paths have a chance to extend along out‐of‐plane directions by circumventing the micrometer‐sized nanosheets. Here, large‐sized (111)‐oriented BaTiO3 (BTO) films with outstanding epitaxiality and ferroelectricity are embedded in poly(vinylidene fluoride) (PVDF) using optimal transfer and hot‐pressing processes. The 2D–2D (2–2) type BTO/PVDF composites interlayered by 2‐layer BTO (about 0.2 µm thick of each layer) exhibit the highest U of 20.7 J cm‐3 at 690 MV m‐1, which is 222.6% that of pure PVDF. Phase‐field simulations reveal that high‐resistance PVDF films as outer layers can prevent the charges injection from electrodes and high‐dielectric BTO films as inner layers can effectively suppress the mobile charges across interfaces between layers, leading to a remarkable improvement of breakdown strength. This work puts forward a scalable approach to enhance the U of inorganic/organic composites for advanced energy storage materials and applications.

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2D filler-reinforced polymer nanocomposite dielectrics for high-k dielectric and energy storage applications

Cited by 121 publications

References 177 publications

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Effect of organic Na⁺‐montmorillonite on the dielectric and energy storage properties of polypropylene nanocomposites with polypropylene‐graft‐maleic anhydride as compatibilizer

2–2 Type PVDF‐Based Composites Interlayered by Epitaxial (111)‐Oriented BTO Films for High Energy Storage Density

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2D filler-reinforced polymer nanocomposite dielectrics for high-k dielectric and energy storage applications

Cited by 121 publications

References 177 publications

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO3 Nanosheets

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO3 Nanosheets

Effect of organic Na+‐montmorillonite on the dielectric and energy storage properties of polypropylene nanocomposites with polypropylene‐graft‐maleic anhydride as compatibilizer

2–2 Type PVDF‐Based Composites Interlayered by Epitaxial (111)‐Oriented BTO Films for High Energy Storage Density

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Product

Resources

About

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Symmetric Trilayer Dielectric Composites with High Energy Density Using a Low Loading of KNbO₃ Nanosheets

Effect of organic Na⁺‐montmorillonite on the dielectric and energy storage properties of polypropylene nanocomposites with polypropylene‐graft‐maleic anhydride as compatibilizer