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Reddy, M. Jaipal; Sreekanth, T.; Chandrashekar, M.; Rao, Uma

doi:10.1023/a:1004707521250

Cited by 43 publications

(8 citation statements)

References 16 publications

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“…The polymer electrolytes PVP doped with NH 4 Cl in different molar ratios such as (100:0), (95:5), (90:10), (85:15), (80: 20), and (75:25) were prepared by solution-casting technique using distilled water as solvent. Aqueous solutions of PVP and NH 4 Cl were stirred continuously with a magnetic stirrer for several hours to obtain a homogeneous solution.…”

Section: Methodsmentioning

confidence: 99%

“…It is an amorphous polymer having high T g (86°C) due to the presence of the rigid pyrrolidone group. Addition of salts with a conducting species as silver and potassium to PVP has a marked influence on conductivity of the polymer [19,20]. It has been reported as the best candidate for the application of humidity sensor in the presence of iodine and cobalt [21].…”

Section: Introductionmentioning

confidence: 99%

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Structural, vibrational, thermal, and conductivity studies on proton-conducting polymer electrolyte based on poly (N-vinylpyrrolidone)

Vijaya¹,

Selvasekarapandian

Hirankumar

et al. 2011

Ionics

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The proton-conducting polymer electrolytes based on poly (N-vinylpyrrolidone) (PVP), doped with ammonium chloride (NH 4 Cl) in different molar ratios, have been prepared by solution-casting technique using distilled water as solvent. The increase in amorphous nature of the polymer electrolytes has been confirmed by XRD analysis. The FTIR analysis confirms the complex formation of the polymer with the salt. A shift in glass transition temperature (T g ) of the PVP/NH 4 Cl electrolytes has been observed from the DSC thermograms which indicates the interaction between the polymer and the salt. From the AC impedance spectroscopic analysis, the ionic conductivity of 15 mol% NH 4 Cl-doped PVP polymer complex has been found to be maximum of the order of 2.51×10 −5 Scm −1 at room temperature. The dependence of T g and conductivity upon salt concentration has been discussed. The linear variation of the proton conductivity of the polymer electrolytes with increasing temperature suggests the Arrhenius type thermally activated process. The activation energy calculated from the Arrhenius plot for all compositions of PVP doped with NH 4 Cl has been found to vary from 0.49 to 0.92 eV. The dielectric loss curves for the sample 85 mol% PVP:15 mol% NH 4 Cl reveal the lowfrequency β relaxation peak pronounced at high temperature, and it may be caused by side group dipoles. The relaxation parameters of the electrolytes have been obtained by the study of Tanδ as a function of frequency.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural, vibrational, thermal, and conductivity studies on proton-conducting polymer electrolyte based on poly (N-vinylpyrrolidone)

Vijaya¹,

Selvasekarapandian

Hirankumar

et al. 2011

Ionics

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show abstract

“…This may be explained in terms of high ionic conductivity and more amorphisity of (PVA+NaI) (70:30) when compared to the other two systems. The values of cell parameters reported elsewhere [28][29][30][31] along with the data for the present polymer electrolyte cells are compared in Table 3. It is clear that the parameters of the present electrolyte system are comparable with the earlier work based on different polymer electrolyte systems.…”

Section: Battery Discharge Characteristicsmentioning

confidence: 99%

Structural and electrical studies of sodium iodide doped poly(vinyl alcohol) polymer electrolyte films for their application in electrochemical cells

Bhargav

Mohan

Sharma

et al. 2007

Ionics

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Solid polymer electrolyte films based on poly (vinyl alcohol) (PVA) complexed with sodium iodide (NaI) were prepared using solution cast technique. The structural properties of pure and complexed PVA polymer electrolyte films were examined by X-ray diffraction (XRD) studies. The XRD results revealed that the amorphous domains of PVA polymer matrix was increased with the increase in NaI salt concentration. The variation of film morphology was examined by scanning electron microscopy (SEM) studies. Fourier transform infrared spectral studies for pure and complexed PVA films revealed the vibrational changes that occurred due to the effect of dopant salt in the polymer. Direct current conductivity was measured in the temperature range of 303-373 K, and the conductivity was found to increase with the increase in dopant concentration as well as temperature. Measurement of transference number was carried out to investigate the nature of charge transport in these polymer electrolyte films using Wagner's polarization technique. Transport number data showed that the charge transport in these polymer electrolyte systems was predominantly due to ions. Using these polymer electrolytes, solidstate electrochemical cells were fabricated. Various cell parameters like open-circuit voltage, short circuit current, power density, and energy density were determined.

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“…Another advantage of using PVP is that it can be thermally crosslinked resulting in the improved thermal stability and mechanical strength of the blend material [19]. It has been reported that the addition of salt to PVP with conducting species such as silver and potassium has a marked influence on its conductivity [32,33]. Also, PVP has been reported to be the best candidate for humidity sensor in the presence of iodine and cobalt [34].…”

Section: Introductionmentioning

confidence: 99%

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Deshmukh

Ahamed

Polu³

et al. 2016

J Mater Sci: Mater Electron

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New solid polymer blend electrolyte films based on biodegradable polymer blend comprising of polyvinyl alcohol (PVA) and poly (N-vinyl pyrrolidone) (PVP) doped with different wt% of lithium carbonate (Li 2 CO 3 ) salt have been prepared by solution casting method. The resulting PVA/PVP/Li 2 CO 3 polymer blend electrolyte films have been characterized by various analytical techniques such as FTIR, UV-vis, XRD, TGA, polarized optical microscopy and scanning electron microscopy. The FTIR and XRD analysis confirmed the complex formation between PVA/ PVP blend and Li 2 CO 3 salt. The ionic conductivity and the dielectric properties of PVA/PVP/Li 2 CO 3 polymer blend electrolyte films were investigated using an impedance spectroscopy. It was observed that the ionic conductivity of PVA/PVP/Li 2 CO 3 electrolyte system increases as a function of Li 2 CO 3 concentration. The highest ionic conductivity was found to be 1.15 9 10 -5 S cm -1 for polymer blend electrolyte with 20 wt% Li 2 CO 3 content. On the other hand, the dielectric results revealed the non-Debye type of behaviour. The dielectric constant values indicate a strong dielectric dispersion in the studied frequency range which increases as the Li 2 CO 3 content increases. The dielectric constant as high as 1200 (e = 1201.57, 50 Hz, 150°C) and the dielectric loss well below 4 (tan d = 3.94, 50 Hz, 150°C) were obtained for polymer blend electrolytes with 25 wt% Li 2 CO 3 salt. Thus, the results obtained in the present study suggest that the PVA/PVP/ Li 2 CO 3 polymer blend electrolyte system seems to be a promising candidate for solid state battery applications.

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Cited by 43 publications

References 16 publications

Structural, vibrational, thermal, and conductivity studies on proton-conducting polymer electrolyte based on poly (N-vinylpyrrolidone)

Structural, vibrational, thermal, and conductivity studies on proton-conducting polymer electrolyte based on poly (N-vinylpyrrolidone)

Structural and electrical studies of sodium iodide doped poly(vinyl alcohol) polymer electrolyte films for their application in electrochemical cells

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

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