Morphology, thermal, electrical and electrochemical stability of nano aluminium-oxide-filled polyvinyl alcohol composite gel electrolyte

Chand, Navin; Rai, Neelesh; Agrawal, S. L.; Patel, S. K.

doi:10.1007/s12034-011-0318-7

Cited by 49 publications

(25 citation statements)

References 29 publications

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“…Increasing the dopant concentration, beyond x = 0.10 wt%, results in increasing degree of crystallinity due to incorporation of nano‐structured Al 2 O 3 in PVA films. The obtained average crystallite size (τ) of the pure Al 2 O 3 nanofiller is approximately 5 nm as estimated using the Debye–Scherrer Equation (τ = K λ/β cos θ); where K is the shape factor, λ is the x‐ray wavelength, β is the full width at half maximum in radians, and θ is the Bragg angle . The obtained crystallites size of the x = 0.40 wt% composite sample is of the order of approximately 3 nm.…”

Section: Resultsmentioning

confidence: 92%

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Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Ahmad

Hassan

2018

Polymer Composites

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Samples of solid poly(vinyl alcohol) (PVA) membrane filled with different concentrations of Al 2 O 3 nanofiller were prepared by the casting method. XRD intensity revealed a reduction in the PVA hump intensity with increasing the Al 2 O 3 concentration up to x 5 0.10 wt%, indicating that the amorphous character increases. Although for higher Al 2 O 3 content the membrane crystallinity increased. FTIR spectra revealed distinct absorption bands at approximately 938,845 and 784 cm 21 resulting from the chemical bonding of the Al 2 O 3 nanofiller with PVA hydroxyl groups. The DC electrical conductivity was enhanced with the Al 2 O 3 nanofiller up to x 5 0.10 wt % by three orders of magnitude then it was reduced for higher Al 2 O 3 values. This enhancement reflected the creation of charge transfer complexes inside the chains of the PVA network. The reduction in the optical band gap energy with dopant concentration up to x 5 0.10 wt% is attributed to defects in the films as well as leads to increased chemical linkage between the polymer chains. These findings confirm that, Al 2 O 3 nanofiller were dispersed homogenously through the polymer matrix up to 0.10 wt% uptake. POLYM. COMPOS., 00:000-000,

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Section: Resultsmentioning

confidence: 92%

“…The obtained crystallites size of the x = 0.40 wt% composite sample is of the order of approximately 3 nm. Hence the Al 2 O 3 nanofillers are homogenously dispersed throughout the PVA matrix with a maximum uptake at x = 0.10 wt% .…”

Section: Resultsmentioning

confidence: 99%

Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Ahmad

Hassan

2018

Polymer Composites

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“…(8) based on the free volume concept. A number of other polymer electrolyte systems, including those based on PVA [14,[24][25][26][27], have exhibited a similar behavior.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Characterization of C2H2O4 doped PVA solid polymer electrolyte

Alakanandana¹,

Subrahmanyam²,

Sayanna³

et al. 2014

Journal of Polymer Engineering

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A novel solid polymer electrolyte based on poly vinyl alcohol (PVA) with oxalic acid was prepared by the solution caste technique. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) measurements carried out on the samples clearly revealed the modification of the PVA structure; the PVA crystallinity was reduced with increasing oxalic acid content and became more amorphous. The surface morphology of these complexed polymer electrolytes was analyzed by scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) spectral studies of the samples suggested that the interaction between H + ions of oxalic acid and oxygen of the hydroxyl group (OH) of PVA plays a major role in proton conductivity. The optical absorption studies were performed on these samples in a range of wave numbers from 200 nm to 600 nm and the optical band gap values were evaluated. Direct current (DC) conductivity was measured and temperature dependence in the range 27-273°C was studied. It was observed that the conductivity at temperatures beyond the glass transition temperature (T g ) showed a Vogel-Tamman-Fulcher (VTF) type behavior. The electrical conductivity studies on PVA with oxalic acid, in a 70:30 proportion by wt%, demonstrated that the polymer composite is a promising electrolyte for applications in electrochemical cells.

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“…It is now well established that in polymer electrolytes, ion transport occurs through the amorphous phase through a complex mechanism involving the segmental mobility of the polymer chains. For this reason, crystallization is avoided to enhance electrical conductivity by modifying the pure polymer structure or by adding one or more plasticizers or filler particles to inhibit regular packing . Since bigger anions have more charge delocalization, the dopant salts with large anions are expected to possess low lattice energy of dissociation .…”

Section: Introductionmentioning

confidence: 99%

“…Also, dispersal of filler in the electrolyte matrix have been reported to overcome the problem of liquid exudation in polymer gel electrolytes. NCGPEs obtained using ceramic fillers showed significant improvement in ionic conductivity, better mechanical, thermal, and electrochemical properties . Ferrites and multiferroic oxides are new members in the family of ceramic fillers which have been successfully used for the development of nanocomposite gel polymer electrolytes .…”

Section: Introductionmentioning

confidence: 99%

Role of Multiferroic Filler on the AC Response of Bi_1‐_xBa_xFeO₃ doped PVA:NH₄CH₃COO Nanocomposite Gel Polymer Electrolytes

Singh

Shukla²,

Agrawal

2019

Macromolecular Symposia

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The frequency dependent AC conductivity and dielectric studies of multiferroic filler (Bi 1-x Ba x FeO 3 ) doped nanocomposite gel polymer electrolyte (NCGPEs) based on PVA:(NH 4 CH 3 COO) are investigated in the present work. The nano composite gel polymer electrolyte systems are synthesized for various filler concentrations by solution cast method. The effect of filler concentration on ionic conductivity is studied using AC impedance technique in the frequency range 1-10 6 Hz. X-ray diffraction studies reveal the formation of nanocomposite gel polymer electrolyte. The low frequency dispersion in the dielectric response of electrolytes shows the relaxation contribution is superimposed with electrode polarization effects. The relaxation peaks in the NCGPEs are found to shift toward higher frequency side with increasing filler concentration and are suitably correlated to change in morphology of the gel electrolyte system. The variation of AC conductivity with frequency is seen to obey Jonscher's universal power law with the exception of small deviation in the low frequency regime. Modulus formalism of dielectric response suggests that the ion transport is strongly coupled to the polymer segmental motion.

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Morphology, thermal, electrical and electrochemical stability of nano aluminium-oxide-filled polyvinyl alcohol composite gel electrolyte

Cited by 49 publications

References 29 publications

Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Characterization of C2H2O4 doped PVA solid polymer electrolyte

Role of Multiferroic Filler on the AC Response of Bi_1‐_xBa_xFeO₃ doped PVA:NH₄CH₃COO Nanocomposite Gel Polymer Electrolytes

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Morphology, thermal, electrical and electrochemical stability of nano aluminium-oxide-filled polyvinyl alcohol composite gel electrolyte

Cited by 49 publications

References 29 publications

Structure and Physical Properties of Al2O3 Nanofillers Embedded in Poly(Vinyl Alcohol)

Structure and Physical Properties of Al2O3 Nanofillers Embedded in Poly(Vinyl Alcohol)

Characterization of C2H2O4 doped PVA solid polymer electrolyte

Role of Multiferroic Filler on the AC Response of Bi1‐xBaxFeO3 doped PVA:NH4CH3COO Nanocomposite Gel Polymer Electrolytes

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Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Structure and Physical Properties of Al₂O₃ Nanofillers Embedded in Poly(Vinyl Alcohol)

Role of Multiferroic Filler on the AC Response of Bi_1‐_xBa_xFeO₃ doped PVA:NH₄CH₃COO Nanocomposite Gel Polymer Electrolytes