Boosting Energy Storage of Poly(vinylidene difluoride) Nanocomposite Based Flexible Self-Standing Film with Low Amount of Hydroxylated V₂O₅

Abstract

Polymer-ceramic based nanocomposite dielectric materials have become an attraction for researchers due to their lightweight and high dielectric breakdown strength as well as good dielectric properties. We have synthesized poly(vinylidene difluoride) (PVDF)/hydroxylated-V 2 O 5 (Hy-V 2 O 5 ) ferroelectric polymer nanocomposite self-standing film, with an average thickness of 0.07 ± 0.005 mm. The phase identification, surface analysis, and structural analysis were performed using differential scanning calorimetry, X-ray photoelectron spectroscopy analysis, and X-ray diffraction, respectively. The analysis of atomic force micrographs reveals lower surface roughness of the nanocomposite films and confirms that the film is suitable for energy storage rather than charge transport with the help of the isotropic power spectral density (PSD) profile. The loading of a low amount of Hy-V 2 O 5 filler in PVDF significantly enhances the ferroelectric polarization, making it highly suitable for high energy storage applications. Enhancement of the dielectric constant (from ∼9 to 29.86) and polarization (P max for PVDF = 0.86 μC/cm 2 to P max for PVDF/Hy-V 2 O 5 = 2.7 μC/cm 2 at the 1000 kV/cm field) is obtained. The energy density for the nanocomposite increased to 220% of that of the pure PVDF. Due to the low amount of filler, there is no substantial reduction in the dielectric breakdown strength of the nanocomposite, which is maintained at 1766.93 kV/cm.

Enhancement of Energy Storage Performance of PMMA/PVDF Composites by Changing the Crystalline Phase through Heat Treatment

“…In this regard, the volume and weight of dielectric film capacitors need to be increased in industrial production to improve their energy density, increasing the costs. As a result, there is a pressing need to create dielectric materials with excellent energy storage capabilities and significant breakdown strengths to satisfy the scenario's predicted future need for lightweight and tiny devices [9][10][11].…”

“…Incorporating inorganic components with a high dielectric value into polymer composites allows for a straightforward and speedy method of raising the dielectric properties of the resulting material. However, the charge accumulation and electric field distortion that can occur as a result of a mismatch in the dielectric constant between inorganic and organic phases, the agglomeration phenomenon that can occur as a result of the uneven dispersion of inorganic fillers, and the structural defects at the interface can all reduce in the composites' breakdown durability and energy storage capacity [3,10,15,22]. At the same time, the interface polarization caused by doping inorganic materials will also produce significant losses, reducing the material charge and discharge efficiency.…”

Electrical and optical properties of environmental friendly Li(1‐x)Smx/3NbO3 ceramics for high‐temperature energy storage applications

“…The samples underwent morphological analysis, elemental composition assessment, and elemental mapping using a scanning electron microscope (FEI Quanta 200 F). The ImageJ (Version 1.53) software was employed to calculate the average grain size of the sintered pellets 35‐37 . FTIR analysis was performed using Nicolet Summit (Nicolet iS5, Thermo Electron Scientific Instrument & LLC) FTIR Spectroscopy to determine both the functional groups and the purity of the synthesized samples.…”

“…The ImageJ (Version 1.53) software was employed to calculate the average grain size of the sintered pellets. [35][36][37] FTIR analysis was performed using Nicolet Summit (Nicolet iS5, Thermo Electron Scientific Instrument & LLC) FTIR Spectroscopy to determine both the functional groups and the purity of the synthesized samples. The absorbance characteristics of the samples were evaluated by using a JASCO V-650 UV-visible Spectrophotometer, in the spectral range from 200 to 800 nm and with a scan rate of 2 nm/s under room temperature conditions.…”

“…As the doping level changes, the proportion of energy stored vs lost varies, which is also indicating a potential option for improving energy storage efficiency. The ferroelectric energy efficiency defined by the ratio of the stored energy density to the total energy density, exhibits a clear dependence on the doping level, potentially guiding the material design for capacitors with higher energy densities and lower losses 35,39,84 and for the Li (1-x) Sm (x/3) NbO 3 with varying composition all the parameters related to Energy density characterizations are shown in Table 2. The energy efficiency vs composition is plotted and shown in Figure 14F.…”