Significantly Enhanced Dielectric Behavior of Polyvinylidene Fluoride-Barium Strontium Titanate Flexible Nanocomposite Thick Films: Role of Electric Field-Induced Effects

Jaidka, Sachin; Aggarwal, Arun Kumar; Chopra, Sandeep; Singh, Dwijendra P.

doi:10.1007/s11664-022-09784-4

Cited by 12 publications

(4 citation statements)

References 52 publications

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“…The breakdown strength (BDS) of PVDF-BST nanocomposites was measured by using Danbridge 30 kV Non-Destructive Insulation Tester (Denmark) by using the circular electrodes described elsewhere. 25 Dielectric displacement versus electric field (D-E) loops were measured by employing a 10 Hz triangular wave in the Premier Radiant-II multiferroelectric tester.…”

Section: Methodsmentioning

confidence: 99%

“…The Wayne Kerr 6500B impedance analyzer was used to measure the room temperature dielectric properties of these nanocomposites in the frequency range of 100 Hz to 1 MHz with an oscillating voltage of ±1 V across the samples. The breakdown strength (BDS) of PVDF‐BST nanocomposites was measured by using Danbridge 30 kV Non‐Destructive Insulation Tester (Denmark) by using the circular electrodes described elsewhere 25 . Dielectric displacement versus electric field (D‐E) loops were measured by employing a 10 Hz triangular wave in the Premier Radiant‐II multiferroelectric tester.…”

Section: Methodsmentioning

confidence: 99%

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Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Jaidka,

Singh

2023

Polymer Composites

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Poly(vinylidene)fluoride‐Ba0.8Sr0.2TiO3 (PVDF‐BST) trilayered nanocomposites (with different vol% loading of BST nanoparticles, i.e. 0.75%, 1.50%, 2.25% and 3.00%) has been processed by the tape casting technique. The upper and lower layers of the nanocomposites are casted in the same direction, whereas the middle layer is casted in the opposite direction. The trilayered PVDF‐BST nanocomposite consisting of 3.00 vol% of BST nanoparticles exhibited high dielectric permittivity (~25), low tangent loss (~0.03) and moderately high breakdown strength (BDS ~282 MV/m). Moreover, it also possesses a high discharge energy density (~7.8 J/cc at 1400 kV/cm) and efficiency (~93%). A mechanism for the excellent energy storage behavior and dielectric properties has been proposed. Where, moderately high BDS and low tangent loss are associated with the spatial distribution of the local electric field at interlayer interfaces of PVDF‐BST trilayered nanocomposites, which restricts the conduction of charge carriers at high electric field. The ultrahigh efficiency and enhanced discharge energy density is attributed to the formation of interfacial dipoles at various interfaces such as interlayer, intralayer (PVDF/PVDF), and PVDF/BST interfaces. These investigations would be adopted as a futuristic strategy for developing excellently efficient polymer‐ceramic nanocomposites for the high energy density capacitors used in pulsed power applications.Highlights PVDF‐BST trilayered nanocomposites exhibit high ε′ ~25 and low tanδ ~0.03. Nanocomposite shows ultra‐high energy efficiency ~93% and enhanced UD ~ 7.8 J/cc. Mechanism for the excellent energy storage and dielectric properties Relies on the interfacial dipoles and distribution of the local electric field.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Jaidka,

Singh

2023

Polymer Composites

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“…13 Besides, polar groups (e.g., −C−F) are susceptible to an electric field to induce directional alignment. 14 Applying an electric field is another effective way to control the crystallization phase of the PVDF polymer. Melt electrospinning makes obtaining the β phase simple, but the resulting fibers have a larger diameter, often reaching the micron range, which is not the desired outcome.…”

Section: Introductionmentioning

confidence: 99%

“…According to the principle of molecular potential energy, increasing the processing temperature is one of the most effective ways to induce the β phase . Besides, polar groups (e.g., −C–F) are susceptible to an electric field to induce directional alignment . Applying an electric field is another effective way to control the crystallization phase of the PVDF polymer.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the β Phase of Poly(vinylidene fluoride) Nanofibrous Membranes for Thermostable Separators in Lithium-Ion Batteries

et al. 2023

ACS Appl. Nano Mater.

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It is challenging to simultaneously control the phase and the finer nanofiber shape to prepare a thinner poly(vinylidene fluoride) (PVDF)-based separator. Here, an ultrafine β-PVDF nanofibrous membrane was fabricated by combining the melt electrospinning and phase-changing techniques. Temperature and electrostatic fields were introduced simultaneously to boost the β phase of PVDF. Meanwhile, phase-sacrificial polylactic acid (PLA) was employed to further reduce the diameter of the melt-electrospun fibers, which can significantly reduce the separator thickness and increase the specific surface area, addressing the main limitation of the application of nanofiber membranes in commercial separators. Furthermore, the strong interactions between the −C–F bonds in PVDF and the −CO bonds in PLA further enhanced the regular TTTT structural β phase. Besides, SiO2 and Al2O3 ceramic nanoparticles were codeposited on the β-PVDF nanofiber membrane by magnetron sputtering, which not only improves the thermostability but also prevents coating layer depowdering and thickness increase. The lithium-ion battery (LIB) with such a composite separator showed an ion conductivity of 2.242 mS/cm and a high thermostability of 150 °C. This work elucidates the controlling mechanism of the crystalline phase of PVDF-based nanofibrous membrane and provides encouraging guidance for constructing a functional layer of battery separators.

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Quenching induced modified nanoarchitectonics in the dielectric and energy storage behavior of poly (vinylidene fluoride)/Ba0.7Sr0.3TiO3 composites thick films

Gupta,

Jaidka,

Singh

2024

Appl. Phys. A

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Significantly Enhanced Dielectric Behavior of Polyvinylidene Fluoride-Barium Strontium Titanate Flexible Nanocomposite Thick Films: Role of Electric Field-Induced Effects

Cited by 12 publications

References 52 publications

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Enhancing the β Phase of Poly(vinylidene fluoride) Nanofibrous Membranes for Thermostable Separators in Lithium-Ion Batteries

Quenching induced modified nanoarchitectonics in the dielectric and energy storage behavior of poly (vinylidene fluoride)/Ba0.7Sr0.3TiO3 composites thick films

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Significantly Enhanced Dielectric Behavior of Polyvinylidene Fluoride-Barium Strontium Titanate Flexible Nanocomposite Thick Films: Role of Electric Field-Induced Effects

Cited by 12 publications

References 52 publications

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba0.8Sr0.2TiO3 nanocomposites

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba0.8Sr0.2TiO3 nanocomposites

Enhancing the β Phase of Poly(vinylidene fluoride) Nanofibrous Membranes for Thermostable Separators in Lithium-Ion Batteries

Quenching induced modified nanoarchitectonics in the dielectric and energy storage behavior of poly (vinylidene fluoride)/Ba0.7Sr0.3TiO3 composites thick films

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Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites