Suppressing the loss and enhancing the breakdown strengths of high-k materials via constructing layered structure

Xia, Shuimiao; Shi, Zhicheng; Sun, Liang; Sun, Shengbiao; Dastan, Davoud; Fan, Runhua

doi:10.1016/j.matlet.2022.131654

Cited by 39 publications

(17 citation statements)

References 12 publications

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“…We compared the dielectric energy storage capacity values that we obtained with values in the literature. − As Figure shows, achieving high U d values with low fractions of fillers is challengingfiller contents below 3 wt % usually result in U d below 7 J/cm 3 . However, in this work, composites containing just 1 wt% RGO@BTO nanosheets have been seen to achieve an U d of 8.25 J/cm 3 .…”

Section: Resultsmentioning

confidence: 99%

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Xia

Chen

Yan

et al. 2022

ACS Appl. Electron. Mater.

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Polymer dielectric composites are extensively used in modern electronic devices because of their extremely high power density. However, unfavorable coupling between breakdown strength and dielectric permittivity can make achieving high energy density a challenge. In this study, reduced graphene oxide @ barium titanate (RGO@BTO) hybrid nanosheets have been fabricated and utilized as fillers in the design of RGO@BTO/P(VDF-HFP) single-layer films. An increase in permittivity to 24.8@10 kHz, i.e., equivalent to 253% of the P(VDF-HFP) (∼9.8@10 kHz) matrix, has been achieved with only 1 wt % RGO@BTO nanofillers due to the formation of microcapacitors. Furthermore, the RGO@BTO/P(VDF-HFP) film is hot-pressed with a PEI film and a P(VDF-HFP) film, forming a trilayer structure. Consequently, this trilayer film displays a high breakdown strength of 478 kV/mm, a high energy density of 8.25 J/cm 3 , and a satisfactory efficiency of 64.3%. Thus, this study provides an efficient route for designing polymer composites that combine high energy density with high permittivity.

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Section: Resultsmentioning

confidence: 99%

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Xia

Chen

Yan

et al. 2022

ACS Appl. Electron. Mater.

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“…Except for dielectric constant ( ε r ), the electric breakdown strength ( E b ) is also anther crucial parameter for achieving high‐electric‐field dielectric materials. [ 33 ] Herein, the effect of ultrahigh‐insulation BT@ArPFTU NPs on the breakdown strength of nanocomposites was well explained using the equation of two‐parameter Weibull statistics (1):

P\left( E \right) = 1 - \exp \left[ { - {{\left( {\frac{E}{\alpha }} \right)}^\beta }} \right]

…”

Section: Resultsmentioning

confidence: 99%

Interface‐Tailored Relaxor Ferroelectric Nanocomposites with Ultrahigh‐Insulation Shell of Fluorinated Aromatic Polythiourea for High‐Capacitance Energy Storage Applications

Zhu

Zhou

Zhang

et al. 2022

Adv Elect Materials

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The strategy of interface engineering plays a prominent role in obtaining desirable dielectric performance of polymer nanocomposites. In this study, ultrahigh‐insulation BaTiO3@fluorinated aromatic polythiourea (BT@ArPFTU) nanoparticles (NPs), which are successfully synthesized via microwave‐initiated polymerization, are served as novel nanofillers to prepare poly(vinylidenefluoride‐trifluoroethylenechlorotrifuoroethylene)‐based (P(VDF‐TrFE‐CTFE)‐based) nanocomposites for capacitor applications. The ArPFTU coating shell forms a strong interface with 30‐nm thickness between BT and the matrix. It not only contributes to the suppression of current density at the interfaces, the regulation of interfacial charge distribution and tolerating high electric‐field strength, but also favors the improvement in dielectric constant and electric polarization due to interfacial polarization, as confirmed by finite element simulations and experimental results. In addition, the direct observation of electric‐polarization enhancement at the interfaces in the P(VDF‐TrFE‐CTFE)/BT@ArPFTU nanocomposites is well probed by piezoelectric force microscopy. Remarkably, with small loading of BT@ArPFTU NPs, relaxor ferroelectric nanocomposites display an unprecedented discharged energy density of 23.1 J cm−3 and the charge–discharge efficiency of 65%, which is much larger than that of other types of BT‐based polymer nanocomposites and commercial biaxially oriented polypropylene of 0.71 J cm−3. This systematic study further paves a new avenue to design high‐performance polymer nanocomposites by interfacial architecture for capacitor application.

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“…As previous reported, the dielectric constant is significantly enhanced by constructing layered structure and numerous hierarchical equivalent micro-capacitors. [41,42] The 0D, 1D and 2D PLZT fillers have different interfacial polarization effects and produce different numerous hierarchical equivalent micro-capacitors, which is beneficial to improve the dielectric properties of the composites. The result indicates that anisotropic fillers are helpful for improving the dielectric properties of the composite films.…”

Section: Resultsmentioning

confidence: 99%

High Energy Density of Polyvinylidene Fluoride‐Based Composite Films Induced by Anisotropic PLZT Fillers

Huang

Liu

et al. 2022

ChemNanoMat

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With the rapid development of electronic industry, high‐energy storage density dielectric materials are urgently needed to meet electronic components equipment miniaturized demand. Polymer dielectric materials have the advantages of good flexibility and high breakdown field, however, the energy storage capacity of polymers is limited by its inherent low dielectric constant. To improve the dielectric constant and energy storage density of the polymer material, we synthesized 0D (zero dimension), 1D, 2D lanthanum modified lead zirconate titanate (PLZT) fillers which introduced into polyvinylidene fluoride (PVDF) matrix. The anisotropic of the fillers has obvious improvement on the properties of materials. Compared with 0D fillers, high anisotropic fillers are more effective in enhancing the dielectric performances and energy density of PVDF based composites. The high anisotropic ratios of 2D fillers limit the charge migration toward the electrodes and hold back the growing electric tree during breakdown. Consequently, high breakdown strength (430 MV/m) and high discharge energy density (13.9 J/cm3) for 2D PLZT/PVDF composite films were obtained. This work is of critical significance in making dielectric capacitors for energy storage devices and reveals the influence mechanism for different dimensions fillers on the dielectric and energy storage properties of PVDF based composites.

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Suppressing the loss and enhancing the breakdown strengths of high-k materials via constructing layered structure

Cited by 39 publications

References 12 publications

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Interface‐Tailored Relaxor Ferroelectric Nanocomposites with Ultrahigh‐Insulation Shell of Fluorinated Aromatic Polythiourea for High‐Capacitance Energy Storage Applications

High Energy Density of Polyvinylidene Fluoride‐Based Composite Films Induced by Anisotropic PLZT Fillers

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