Sandwich‐structured PPy‐TiO
            <sub>2</sub>
            /PVDF composite films with outstanding dielectric properties and energy density

Qiu, Jinyue; Weng, Ling; Zhang, Xiaorui; Sui, Yu

doi:10.1049/nde2.12031

Cited by 20 publications

(5 citation statements)

References 32 publications

(35 reference statements)

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“…It is contrary to the demands for lightweight and miniaturization of modern electronic devices. [6][7][8][9] Thus, to design an advanced dielectric material with fundamentally improved energy storage density has become a critical challenge in the energy storage field in recent decades.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Zhu

Zhao

Zhang

et al. 2023

Advanced Energy Materials

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Dielectric capacitors are fundamental energy storage components in electronics and electric power systems due to their unique ultrahigh power density. However, their relatively low energy storage density is a long‐standing challenge which greatly limits their practical application range. Chitosan (CS) and montmorillonite (MMT) are two kinds of materials that exist abundantly on the earth with natural surface charges. The positively charged CS and negatively charged MMT can be self‐assembled into the typical sandwich‐structured CS/MMT/CS 2D structure through an electrostatic attraction. Loading these surface‐charged sandwich‐structured nanosheets into poly(vinylidene fluoride)‐based composite with a weight fraction as tiny as 0.3 wt.%, an ultrahigh energy storage density of 32.5 J cm−3 accompanied with a high efficiency of 64% are concurrently achieved with a very low cost and scalable process. Guided by finite element simulation, it is revealed that a number of electric potential wells that exist in the charged sandwich nanosheets impede the acceleration of internal charges and hinder the growth of electrical trees. The results offer a novel paradigm for exploring ultrahigh energy storage density capacitors in an economical way.

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Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Zhu

Zhao

Zhang

et al. 2023

Advanced Energy Materials

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“…Figure 7b shows the dissipation factor of all the PVDF‐TiO 2 NC thin films is very small compared to other dielectric measurements at the lower‐frequency range, which suggest that the PVDF‐TiO 2 NC thin films have a potential application in the piezoelectric. [ 28,31–32 ] These changes in the AC conductivity with respect to frequency and the low‐value dissipation factor suggest that the prepared NC thin films can be used in the production of energy storage devices.…”

Section: Resultsmentioning

confidence: 99%

Tunable Dielectric Spectroscopy of PVDF Thin Films Crossbred with TiO₂ Nanoparticles for the Storage Devices

Ayub H,

Dani,

Khanam

et al. 2024

Macromolecular Symposia

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Polyvinylidenefluoride (PVDF) is a semi‐crystalline ferroelectric polymer with a wide range of interesting properties and shows potentiality in a variety of technological applications. Flexible thin films of PVDF nanocomposites (NCs) have attracted many researchers due to their tunable electronic properties. This paper reports the synthesis, characterization, and dielectric studies of PVDF‐TiO2 NC thin films. The synthesized films are self‐supporting thin and the average thickness of the thin films is 60 µm measured using a Digital thickness gauge of resolution 0.01 mm. TiO2 nanoparticles are prepared using the combustion method. Commercially available PVDF granules are used to develop PVDF‐TiO2 NC thin films using the film casting technique. The structural study of the prepared thin films is carried out using XRD that confirms the retention of the β‐phase of PVDF. The functional group and bonding nature have been studied using FTIR Spectroscopy. The thermal stability of the NC thin films is studied using TGA. The variation of dielectric constant (DC), dielectric loss (DL), AC conductivity, and dissipation factor of the medium of pristine PVDF and PVDF‐TiO2 NC thin films are studied in the frequency range of 10 Hz to 8 MHz at ambient temperature. The dielectric constant of PVDF‐TiO2 NC thin films increases up to 8 wt% and anomaly for 10 wt% of TiO2 fillers in the PVDF matrix at a lower frequency and found to decrease with increasing frequency. The dielectric loss of NC thin films is high at a lower frequency and decreases with an increase in the frequency that is in good agreement with the Maxwell–Wagner type of interfacial polarization. At lower frequencies, the dielectric constant of PVDF‐TiO2 NC increases with the increase in filler content. AC conductivity shows a sharp increase at higher frequencies whereas the dissipation factor of the polymer NCs remains unaltered with respect to frequency by maintaining the trend. This suggests that PVDF‐TiO2 NC is potential material for energy storage devices.

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“…The PVP supported TiO 2 composites XRD pattern was notable for having clearly de ned peaks with comparatively narrow full-width at half maximum (FWHM) values, which suggested a higher degree of crystallinity. The PVDF-supportedTiO 2 composite's diffraction peaks were somewhat broader, which may indicate some dispersion of TiO 2 in the polymer matrix or a degree of reduced crystallinity (Qiu et al 2022). The interactions between TiO 2 nanoparticles and the polymer matrices (PVP and PVDF) can be responsible for the observe shifts or alterations in peak locations, intensities or broadening.…”

Section: Resultsmentioning

confidence: 99%

Catalysis Properties of TiO2 Nanofibers in CO2 Conversion: A Comparative Analysis of Polymer Matrices

Gehlot,

Kothari,

Tiwari

et al. 2024

Preprint

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The quest for efficient and sustainable methods to mitigate Carbon Dioxide (CO2) emissions is a pressing global challenge. This study delves into the crucial role of polymers in tailoring the performance of Titanium Dioxide (TiO2) nanofibers for CO2 conversion reactions. By systematically comparing the influence of different polymers, specifically Polyvinyl Pyrrolidone (PVP) and Polyvinylidene Fluoride (PVDF), on the CO2 conversion activity of TiO2-NFs, we shed light on the remarkable potential of polymeric selection to fine-tune catalyst properties. The paper uses advanced experimental techniques to analyze the structural and morphological properties of PVP-TiO2-NFs and PVDF- TiO2-NFs demonstrating their various morphologies. The investigation involves SEM, TEM, XRD, BET and UV-Vis spectroscopy to better understand the charge separation and recombination processes involved in both materials' CO2 conversion. The results show considerable differences, choice of polymer significantly impacts the CO2 conversion performance of TiO2-NFs. PVP based NFs exhibit enhanced surface area and porosity, resulting in superior catalytic activity, while PVDF based NFs demonstrate remarkable stability. These findings pave the way for innovative approaches to tackle climate change and develop a more environmentally friendly future by advancing energy-efficient and long-lasting photocatalytic technology.

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Sandwich‐structured PPy‐TiO ₂ /PVDF composite films with outstanding dielectric properties and energy density

Cited by 20 publications

References 32 publications

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Tunable Dielectric Spectroscopy of PVDF Thin Films Crossbred with TiO₂ Nanoparticles for the Storage Devices

Catalysis Properties of TiO2 Nanofibers in CO2 Conversion: A Comparative Analysis of Polymer Matrices

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Sandwich‐structured PPy‐TiO 2 /PVDF composite films with outstanding dielectric properties and energy density

Cited by 20 publications

References 32 publications

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Ultrahigh Energy Storage Density in Poly(vinylidene fluoride)‐Based Composite Dielectrics via Constructing the Electric Potential Well

Tunable Dielectric Spectroscopy of PVDF Thin Films Crossbred with TiO2 Nanoparticles for the Storage Devices

Catalysis Properties of TiO2 Nanofibers in CO2 Conversion: A Comparative Analysis of Polymer Matrices

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Product

Resources

About

Sandwich‐structured PPy‐TiO ₂ /PVDF composite films with outstanding dielectric properties and energy density

Tunable Dielectric Spectroscopy of PVDF Thin Films Crossbred with TiO₂ Nanoparticles for the Storage Devices