Electrical and Mechanical Properties of the Dielectric Capacitor Film Based on Polyvinylidene Fluoride and Aromatic Polythiourea

Li, Ya; Fu, Qiong; Li, Lili; Li, Weiping

doi:10.1007/s11664-016-4747-3

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…However, due to the poor solvent processing, ArPTU films were usually fabricated through vapor deposition polymerization or casting on silicon substrates, which are difficult to enlarge for scale production. Moreover, the rigid molecular structure makes ArPTU brittle and unsuitable as a flexible dielectric film . So far, various chain segments (e.g., aromatic, aliphatic, and polyether) have been introduced to alter conjugation length and morphology of ArPTU and the dielectric responses have been well tailored, whereas limited progress has been made in improving the flexibility of ArPTU …”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the rigid molecular structure makes ArPTU brittle and unsuitable as a flexible dielectric film. 37 So far, various chain segments (e.g., aromatic, aliphatic, and polyether) have been introduced to alter conjugation length and morphology of ArPTU and the dielectric responses have been well tailored, whereas limited progress has been made in improving the flexibility of ArPTU. 38 In this study, we report the fabrication, dielectric properties and electrical energy storage of cross-linked polysiloxanearomatic thiourea dielectric films.…”

Section: ■ Introductionmentioning

confidence: 99%

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All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Liu

Chen

Jiang

et al. 2020

ACS Appl. Energy Mater.

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The development of high-power-density energy storage devices and systems calls for high-dielectric-constant (high-k) polymer films with low dielectric loss. Aromatic polythiourea attracts many interests because of its low dielectric loss and high beakdown strength, whereas the high brittleness significantly limits its application as dielectric films. In this report, flexible high-k films were successfully fabricated by cross-linking aromatic thiourea oligomers with allyl glycidyl ether grafted poly(methylhydrosiloxane) (PMHS). Siloxane segments of PMHS improve the flexibility of the cross-linked dielectric films, and the grafted glycidyl ether side groups of PMHS provide highly polarizable building blocks. Because of the high dipole moment (4.89 D), aromatic thiourea endows the dielectric films with a high dielectric constant. Microphase separation morphology was found within the film, and the self-assembly into layered lamellae contributed to the scatter of high-energy-charge carriers. As a result, the dielectric films exhibit reduced dielectric loss tangent and suppressed leakage current density with a high dielectric constant of above 6, a promissing energy density of 3.15 J/cm3 and a high efficiency of above 87% under an electric field of 350 MV/m.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Liu

Chen

Jiang

et al. 2020

ACS Appl. Energy Mater.

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“…Unfortunately, PTUA film faces the issue of poor mechanical properties due to brittleness, which is extremely limited to processed into flexible capacitor films for mass production. [ 26,105 ]…”

Section: Dielectric Polymers For Film Capacitorsmentioning

confidence: 99%

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Luo

Mao

Sun

et al. 2021

Macro Chemistry & Physics

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Dielectric films are the foundation of power electronic equipment for energy storage in capacitors. However, typical dielectric films exhibit undesirable energy storage density and thermal stability, limiting its further application in the advanced field. For both pure polymers and composites‐based dielectrics, the macromolecular matrix greatly determines the performances. This paper summarizes the research progress of all‐organic polymer materials for the dielectric application from the perspective of molecular structure design. Systematic comparisons on properties, including dielectric constant and dielectric loss, glass transition temperature, and energy density are given, expecting to inspire researchers to devote further efforts in this area. An outlook for the future of all‐polymer dielectrics is also presented.

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“…PVDF is lightweight, highly resistant to large electric fields, possesses low dielectric loss, and, more importantly, is highly flexible. [2][3][4][5][6] However, the dielectric constant of PVDF is much less than that of the piezoelectric materials already being used for capacitor fabrication. One method of increasing the dielectric constant is to add a conductive phase, e.g., graphene, to form a composite.…”

Section: Introductionmentioning

confidence: 99%

“…One method of increasing the dielectric constant is to add a conductive phase, e.g., graphene, to form a composite. 3,5,6 Doing so also introduces anomalous dielectric behavior which is evident beyond a certain concentration of conductive material. This concentration is called the percolation threshold, 3 and the resulting system is now considered to be of fractional order, implying Debye relaxation phenomena at low frequency in such systems.…”

Section: Introductionmentioning

confidence: 99%

Packaged Flexible Planar Copper Foil Fractional-Order ‘0.61–0.87’ Capacitors: Series/Parallel Combinations

Shah

Khanday

Jhat³

2023

J. Electron. Mater.

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The fabrication of packaged, flexible, and planar fractional-order capacitors (FOCs) using copper foil electrodes and thin films of PVDF polymer nanocomposite dielectric is presented in this paper. An extensive comparison of FOC properties is made by using two separate conductive fillers, i.e., graphene nanosheets (GNS) and reduced graphene oxide (rGO). Similar fractional-order is observed at a particular filler loading in both types of FOCs; however, differences in the pseudocapacitance values and width of the constant phase (CP) zone exists. Fractional order α (alpha) is reported to vary in the range 0.61-0.87 in impedance measurements made on individual samples of rGO/PVDF and GNS/PVDF FOCs and series/parallel connections of two identical-order FOCs. For series/parallel connection of arbitrary-order FOCs, α varies from 0.61 to 0.83. Phase angle variation ranges from − 56.2° to − 79° for standalone pure FOC samples, whereas, for series/parallel connection of identical or arbitrary order FOCs, phase ranges from − 54.94° to − 77.75°. Phase ripple varies between ± 1.1° and ± 4.8°, and a maximum CP zone of 4 decades (1 kHz to 10 MHz) for the fabricated samples is reported. Industrial manufacturing of large-value capacitors demands materials to be flexible to enable rolling of large-area electrodes into a miniature device. FOCs fabricated in this work match the design specifications of commercial standard thin film capacitors and show highvalue capacitances as well as flexibility of materials and structure.

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Electrical and Mechanical Properties of the Dielectric Capacitor Film Based on Polyvinylidene Fluoride and Aromatic Polythiourea

Cited by 5 publications

References 22 publications

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Packaged Flexible Planar Copper Foil Fractional-Order ‘0.61–0.87’ Capacitors: Series/Parallel Combinations

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