Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Abstract

Nanocomposite films of PVP/PEO containing MoO 3 nanoplates were prepared using a casting procedure. XRD results showed that the addition of MoO 3 in the virgin PVP/PEO blend increases the amorphous domains of polymer nanocomposite (PNC) films. The DFT/FT-IR results have established the miscibility and the interaction between PVP and PEO polymers via hydrogen bonds. Also, FTIR studies showed a coordination interaction between MoO 3 nanoplates and the C=O group of PVP and/or the C-O-C group of PEO of the PVP/PEO blend. The optical band gap values of PNC films of PVP/PEO/MoO 3 decreased with increasing MoO 3 content. The relaxation processes and dielectric dispersion of the prepared PNC films were examined and discussed. The electrical conductivity was enhanced via the addition of MoO 3 nanoplates because of an increase in the number density of the charge carriers. The dominated conduction mechanism of PNC films reveals the correlated barrier hopping model, while the type of relaxation process follows the non-Debye one.These observations illustrate the applicability and potential uses of these PNC films as a nanodielectric material in ceramic capacitors and electrochemical applications such as devices of energy storage and separators in batteries.

Incorporated TiO2 nanoparticles into PVC/PMMA polymer blend for enhancing the optical and electrical/dielectric properties: Hybrid nanocomposite films for flexible optoelectronic devices

“…Furthermore, nanocomposites in which the concentration of fillers is above the percolation threshold show two regions. One is at low frequencies (the plateau region), the conductivity is approximately constant, whereas for the second region at higher frequencies (the dispersion region), it varies with frequency, obeying Jonscher's law 50 : where s is an exponent with a value between 0 and 1 depending on temperature and frequency, σ dc denotes DC conductivity (i.e., frequency independent at ω ≅ 0), A refers to a temperature‐dependent element that affects the level of polarizability, and ω = 2 πf denotes the angular frequency 51 …”

“…where s is an exponent with a value between 0 and 1 depending on temperature and frequency, σ dc denotes DC conductivity (i.e., frequency independent at ω ffi 0), A refers to a temperature-dependent element that affects the level of polarizability, and ω = 2πf denotes the angular frequency. 51 This plateau region correlates with DC conductivity and is related to bulk conductivity resulting from the displacement of charge carriers within the sample. 48 The dispersion region has a linear relationship between frequency and conductivity since charge carriers move easier in high-frequency ranges than low-frequency ranges.…”

Enhancement of the structural, optical, and dispersion performance of polyvinyl alcohol via coronene additive for optoelectronic applications

“…The estimated optical band gap energies for the pure PVA were found to be reduced after filling with coronene. The decrease in the values of the energy gaps may be assigned to coronene's participation in modifying the PVA electronic structure by producing varied polaronic/defect levels, which increase with the localized states density N(E) [39,40]. This increment in localized states may also indicate a lower degree of crystallinity of the filled samples [41].…”

Reinforcement of structural, optical, electrical, and dielectric characteristics of CMC / PVA based on GNP / ZnO hybrid nanofiller: Nanocomposites materials for energy‐storage applications

“…The findings further show that the nature, electrical, optical, and structural characteristics of the CMC/PVA‐GNP/ZnO nanocomposites are improved by adding GNs/ZnO‐NPs hybrid filler to the blend. As a result, the produced nanocomposites can be used in nanodielectrics in electronic devices development, such as capacitors, transistors, and antennas as well as an electromagnetic interference shielding coating material, because the conductivities of the dielectric materials play a significant role in regulating the performance of such devices 39 …”

“…As a result, the produced nanocomposites can be used in nanodielectrics in electronic devices development, such as capacitors, transistors, and antennas as well as an electromagnetic interference shielding coating material, because the conductivities of the dielectric materials play a significant role in regulating the performance of such devices. 39…”