Ion transport model in exfoliated and intercalated polymer–clay nanocomposites

Shukla, Namrata; Thakur, Awalendra K.

doi:10.1016/j.ssi.2010.05.023

Cited by 41 publications

(34 citation statements)

References 28 publications

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“…The PEO based nanodielectrics have recognized as the most suitable flexible matrix for preparation of solid polymeric electrolyte (SPE) films of different sizes and shapes for the rechargeable lithium‐ion batteries . The nanodielectrics consisted of poly(methyl methacrylate) (PMMA) and different nanofillers are also found suitable in preparation of SPE materials …”

Section: Introductionmentioning

confidence: 99%

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Sengwa

Choudhary

2016

Macromolecular Symposia

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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.

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Section: Introductionmentioning

confidence: 99%

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Sengwa

Choudhary

2016

Macromolecular Symposia

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“…On the other hand, an increase in the concentration of clay causes a relative lowering in the flexibility of the polymeric chains and subsequent enhancement in T g possibly due to bridging/ cross linking effect of the clay particles with two nearby polymeric segments. Such an effect is now well understood and reported in literature exclusively for a number of systems: PEO-LiClO 4 +MMT clay [28], PEO-LiClO 4 + n-CeO 2 /n-YSZ [29], PMMA-LiClO 4 +MMT clay [30], and PEO-NaClO 4 +Na 2 SiO 3 /SnO 2 [31].…”

Section: Discussionmentioning

confidence: 83%

AC conductivity and relaxation behavior in ion conducting polymer nanocomposite

Sharma

Thakur

2010

Ionics

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We report the ac conductivity and relaxation behavior analysis for a heterogeneous polymer-clay nanocomposite (PNC) having composition (polyacrylonitrile) 8 LiCF 3 SO 3 +x wt.% dodecylamine modified montmorillonite. Charge transport behavior in an ionically conducting PNC has been analyzed systematically and correlated with the macroscopic parameters like polymer glass transition temperature and available free mobile charge carriers. Intercalation of cation coordinated polymer into the nanometric clay channels has been confirmed by high-resolution transmission electron microscopy. The electrical properties of the intercalated PNC films have been studied using complex impedance/admittance spectroscopy. Excellent correlation of relaxation behavior with polymer glass transition temperature (T g ) confirmed the objectives of the work. An analysis of dielectric relaxation indicates that PNC films are lossy when compared with polymer-salt film. This result is a direct outcome of faster ion dynamics leading to strong electrode polarization effect due to the accumulation of charge carriers at the interface.

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“…PMMA is usually preferred as a SPE host because of its great degree of amorphousness (>96%), capability of coordination to lithium through carbonyl group, high transparency, and light weight. [11]…”

Section: Doi: 101002/masy201800177mentioning

confidence: 99%

“…The present investigation aimed to prepare nano composite SPE by the reaction of Al 2 O 3 with the polymer PMMA and salt LiNO 3 . PMMA is usually preferred as a SPE host because of its great degree of amorphousness (>96%), capability of coordination to lithium through carbonyl group, high transparency, and light weight …”

Section: Introductionmentioning

confidence: 99%

FTIR Studies on PMMA‐LiNO₃ Polymer Electrolyte

Patil¹,

Vithya²,

Premalatha³

et al. 2019

Macromolecular Symposia

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Flexible and free standing solid polymer electrolytes are prepared using solution casting technique comprising PMMA and LiNO3. The properties of the polymer system are further improved by adding nanofillers to the polymer matrix. Hence in the present work, the nanofiller Al2O3 is added to PMMA‐LiNO3 network. The increase in amorphous nature of the polymer with increase in LiNO3 and Al2O3 is revealed by XRD. The interaction of LiNO3 and Al2O3 with the polymer PMMA is analyzed by FTIR.

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Ion transport model in exfoliated and intercalated polymer–clay nanocomposites

Cited by 41 publications

References 28 publications

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

AC conductivity and relaxation behavior in ion conducting polymer nanocomposite

FTIR Studies on PMMA‐LiNO₃ Polymer Electrolyte

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Ion transport model in exfoliated and intercalated polymer–clay nanocomposites

Cited by 41 publications

References 28 publications

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

Dielectric Dispersion and Relaxation in Polymer Blend Based Nanodielectric Film

AC conductivity and relaxation behavior in ion conducting polymer nanocomposite

FTIR Studies on PMMA‐LiNO3 Polymer Electrolyte

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FTIR Studies on PMMA‐LiNO₃ Polymer Electrolyte