Structural and dielectric studies of amorphous and semicrystalline polymers blend‐based nanocomposite electrolytes

Choudhary, Shobhna; Sengwa, R. J.

doi:10.1002/app.41311

Cited by 34 publications

(27 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 15 a & b shows the electric modulus (real part M ′ and loss M " ) spectra of the PEO-PVC blend-based electrolyte films prepared through solution casting methods. These spectra are commonly plotted and analyzed for the solid dielectric materials, as they are free from the contribution of electrode polarization effect at low frequencies, and also independent of the type of electrodes material, and the adsorbed impurities in the sample [68].…”

Section: Dielectric Spectroscopy Analysismentioning

confidence: 99%

Effect of variation of different nanofillers on structural, electrical, dielectric, and transport properties of blend polymer nanocomposites

Arya

Sadiq

Sharma

2017

Ionics

View full text Add to dashboard Cite

In the present work, the effect of different nanofiller (BaTiO3, CeO2, Er2O3 or TiO2) on blend solid polymer electrolyte comprising of PEO and PVC complexed with bulky LiPF6 have been explored. The XRD analysis confirms the polymer nanocomposite formation. FTIR provides evidence of interaction among the functional groups of the polymer with the ions and the nanofiller in terms of shifting and changing peak profile. The highest ionic conductivity is ~2.3×10 -5 S cm -1 with a wide electrochemical stability window of ~3.5 V for 10 wt. % Er2O3. The real and imaginary part of dielectric permittivity follows the identical trend of the decreasing value with increase in the frequency. The particle size and the dielectric constant shows an abnormal trend with different nanofiller. The ac conductivity follows the universal power law. An effective mechanism has been proposed to understand the nanofiller interaction with cation coordinated polymer in the investigated system. storage/conversion devices must have (a) high ionic conductivity; (b) electrochemical stability window (>4 V); (c) low melting point; (d) high boiling point; (e) high chemical stability; (f) nontoxicity; (g) low cost and good compatibility with electrodes. Solid polymer electrolyte (SPEs) plays a dual role as an electrolyte as well as a separator which keeps both electrodes separate and avoids the user from using a spacer as in liquid electrolyte system. The first report on ionic conduction was given by P. V. Wright [5] and Fenton et al [6] in 1973 and it was concluded that polymer host dissolved with an alkali metal salt results in an ionic conductive system. The first application of novel polymer electrolyte in batteries was announced by Armand and his co-workers in 1978 [7]. Most devices are based on liquid/gel polymer electrolytes due to their high ionic conductivity (10 -3 -10 -2 Scm -1 ) and compatible with electrodes. But poor mechanical strength, freezing at low temperature, leakage and flammable nature limits their application in commercial use. This motivates the researchers toward better replacement of liquid polymer electrolyte with a solvent free polymer electrolyte having high ionic conductivity, leak proof, flexibility, wide electrochemical window, good mechanical strength, light weight and ease of preparation [8-10]. Solid polymer electrolytes (SPEs) fulfill all above requirements and have attracted researchers globally towards development for their potential application in portable electronics and electrochemical devices [11]. The commonly used host polymer for preparation of polymer nanocomposite films (PNCs) is PEO [12], PAN [13], PMMA [14], PEMA [15] and PVC [16]. Out of aforesaid host polymers, polyethylene oxide (PEO) is undoubtedly the best host polymer used as SPEs with strong, unstrained C-O, C-C, C-H bonds and it has high dielectric constant, easy availability, and high ionic conductivity in amorphous phase, low glass transition temperature, high flexibility, and good dimensional and chemical stability. But PEO possesses low ion...

show abstract

Section: Dielectric Spectroscopy Analysismentioning

confidence: 99%

Effect of variation of different nanofillers on structural, electrical, dielectric, and transport properties of blend polymer nanocomposites

Arya

Sadiq

Sharma

2017

Ionics

View full text Add to dashboard Cite

show abstract

“…The blending of a small amount of PEO in PMMA matrix results in the increase of PMMA flexibility and reduces its brittleness, whereas the PMMA environment increases the amorphous phase of semi‐crystalline PEO. These tailored physico‐chemical properties recognized the PEO–PMMA blend based nanodielectrics as a new novel material for the preparation of SPEs …”

Section: Introductionmentioning

confidence: 99%

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Sengwa

Choudhary

2016

Macromolecular Symposia

Self Cite

View full text Add to dashboard Cite

Summary: Polymer nanodielectrics is the exponential growing field of advanced materials sciences. Such flexible materials have recognized their suitability as substrate and insulator in fabrication of microelectronic devices, and also in preparation of ion conducting solid polymer electrolytes. The nanodielectric film consisted of poly(ethylene oxide) and poly(methyl methacrylate) (PEO-PMMA; 75/ 25 wt/wt%) blend with 5 wt% montmorillonite (MMT) clay as nanofiller has been prepared by solution-casting method followed by melt-pressed technique. The X-ray diffraction study of the film confirms the intercalated MMT structures in the semicrystalline phase of PEO-PMMA blend. The scanning electron microscopic images confirm the significant variation in morphology of the PEO-PMMA blend on addition of MMT nanofiller. The dielectric relaxation spectroscopy has been employed for measurement of complex dielectric function, ac electrical conductivity and electric modulus spectra of the nanodielectric film in the frequency range 20 Hz-1 MHz. The value of real part of dielectric function of the film is found high at low frequencies due to contribution of electrode polarization effect, but it decreases non-linearly with the increase of frequency and finally approaches the high frequency limiting value of 2.3 at 1 MHz. The relaxation peak in dielectric loss spectra corresponding to polymer segmental motion is found above 10 kHz, and the peak positions have a shift towards higher frequency side with the increase of temperature. The dc conductivity increases and the relaxation time of the polymer segmental motion decreases with increasing temperature of the nanodielectric film according to the Arrhenius behaviour.

show abstract

“…The interactions of CO···Li + and O···Li + complexes with the surface charge of MMT nanosheets result in complete exfoliation of the weakly stacked nanosheets in the investigated SPE films. In general, the SPE films having intercalated MMT structures show the 001 reflection peak around 5° in their XRD spectra …”

Section: Resultsmentioning

confidence: 99%

“…Our survey of literature reveals that fewer attempts have been made to characterize the dielectric dispersion and ion conduction mechanism in PMMA‐based electrolyte films containing poly(ethylene glycol) (PEG) as plasticizer and MMT as nanofiller using dielectric relaxation spectroscopy (DRS). The DRS is a highly sensitive spectroscopic technique for the investigation of dielectric strength, relaxation times associated with cations coordinated polymer chain dynamics, and their correlation with ion transportation in the solid polymeric electrolytes . Recently, we have characterized the dielectric relaxation and ion conduction mechanism in PEO‐ and PMMA‐based SPEs using DRS …”

Section: Introductionmentioning

confidence: 99%

“…In continuation of our work on SPEs, this article deals with the comparative dielectric dispersion and relaxation behavior study of the PMMA–LiClO 4 −10 wt % PEG and PMMA–LiClO 4 −10 wt % PEG–5 wt % MMT electrolyte films prepared by two different methods. The stoichiometric ratio (CO) : Li + = 4 : 1 is used in order to avoid the ion‐pairing effect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of ultrasonic assisted processing and clay nanofiller on dielectric properties and lithium ion transport mechanism of poly(methyl methacrylate) based plasticized polymer electrolytes

Choudhary

Bald

Sengwa

et al. 2015

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Lithium ion conducting solid polymer electrolyte (SPE) films consisted of poly(methyl methacrylate) (PMMA) matrix with lithium perchlorate as a dopant ionic salt, poly(ethylene glycol) as plasticizer and montmorillonite clay as inorganic nanofiller have been prepared by classical solution casting and high intensity ultrasonic assisted solution casting methods. The X-ray diffraction study confirmed the amorphous structure of all these PMMA-based solid electrolytes and the clay nanosheets existed in exfoliated form in their amorphous phase. Dielectric relaxation spectroscopy had been employed for the investigation of complex dielectric function, ac electrical conductivity, electric modulus, and impedance spectra of these electrolytes over the frequency range from 20 Hz to 1 MHz. It was observed that the dielectric properties and ionic conductivity of the electrolytes strongly depended on the sample preparation methods, and also had changes with addition of the clay nanofiller. Temperature-dependent dielectric study of the electrolyte films confirmed that their dc ionic conductivity and conductivity relaxation time values obeyed the Arrhenius behavior. This study also revealed that the lithium ion transportation in the ion-dipolar complexes of these electrolytes occurred through hopping mechanism and it was correlated with the conductivity relaxation time. Preparation of these electrolyte films through ultrasonic assisted solution casting method increased the ionic conductivity by more than one order of magnitude in comparison to that of the classical solution casting method, which revealed that the former was a novel method for the preparation of these SPEs of relatively enhanced ionic conductivity.

show abstract

Structural and dielectric studies of amorphous and semicrystalline polymers blend‐based nanocomposite electrolytes

Cited by 34 publications

References 77 publications

Effect of variation of different nanofillers on structural, electrical, dielectric, and transport properties of blend polymer nanocomposites

Effect of variation of different nanofillers on structural, electrical, dielectric, and transport properties of blend polymer nanocomposites

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Effects of ultrasonic assisted processing and clay nanofiller on dielectric properties and lithium ion transport mechanism of poly(methyl methacrylate) based plasticized polymer electrolytes

Contact Info

Product

Resources

About