Impedance and dielectric studies of nanocomposite polymer electrolyte systems using MMT and ferroelectric fillers

Sunitha, V. R.; Radhakrishnan, Shanthi

doi:10.1007/s11581-016-1784-0

Cited by 12 publications

(7 citation statements)

References 34 publications

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“…This prevents the diffusion of ions in the direction of the field and results in a decrease in dielectric constant (ε′). Figure 13 b shows the large value of dielectric loss (ε′′) towards low frequency region and may be attributed to the accumulation of free charge carrier at electrode/electrolyte interface because in this region charge carriers get sufficient time to accumulate at electrode/electrolyte interface and contribute to large dielectric loss [67]. The overall dielectric constant is higher for the polymer salt complex dispersed with the erbium oxide nanofiller.…”

Section: Dielectric Spectroscopy Analysismentioning

confidence: 98%

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

Arya

Sadiq

Sharma

2017

Ionics

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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...

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Section: Dielectric Spectroscopy Analysismentioning

confidence: 98%

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

Arya

Sadiq

Sharma

2017

Ionics

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“…As layered silicates disrupt the crystallization of polymer so, regarding this Sunitha et al [110] reported the effect of MMT on the (PEO) 4 Ratna et al [112] prepared the Poly (ethylene oxide) (PEO)/clay (Nanocore I30E)) nanocomposites with The electrochemical performance of Li/S cells was investigated using galvanostatic charge/discharge at 60 °C. The specific capacity of 998 mAh g −1 was obtained in the first discharge at 0.1 C, and a reversible capacity of 591 mAh g −1 is achieved in the second cycle ( figure 44 b).…”

Section: Intercalated Type Solid Polymer Electrolytementioning

confidence: 99%

Insights into the use of polyethylene oxide in energy storage/conversion devices: a critical review

Arya

Sharma

2017

J. Phys. D: Appl. Phys.

126

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In this review, latest updates in the poly (ethylene oxide) based electrolytes are summarized. The ultimate goal of researchers globally is towards the development of free standing solid polymeric separator for energy storage devices. This single free standing solid polymeric separator may replace the liquid and separator (organic/Inorganic) used in existing efficient/smart energy technology. As an example polyethylene oxide (PEO) consist of an electron donor rich group which provides coordinating sites to the cation for migration. Owing to this exclusive structure PEO exhibits some remarkable properties such as; low glass transition temperature, excellent flexibility and ability to make complexation with various metal salts which are unattainable by another polymer host. Hence, the PEO is the most emerging candidate that have been examined or is currently under audition for application in energy storage devices. So, this review article first provides the detailed study of the PEO properties, characteristic of constituents of polymer electrolyte and suitable approaches for the modification of polymer electrolytes. Then, the synthesization and characterizations techniques are outlined. The structures, characteristics, and performance during charge-discharge of four types of electrolyte/separators which are Liquid, Plasticized, and dispersed/intercalated electrolyte are highlighted. The suitable ion transport mechanism proposed by researchers in different renowned group have been discussed for better understanding of the ion dynamics in such systems.Keywords: polyethylene oxide, constituents of polymer electrolytes, structural and microstructural properties, electrochemical properties summarizes the requirements for selection of electrolyte cum separator for efficient lithium-ion battery system [4].At, present, LIB is the ideal choice for the automotive sector by Companies including Tesla Inc. and Volkswagen AG due to ease of transportation, environmentally friendly, less cost [5]. Allied Market Research published a report entitled, "World Lithium-Ion Battery Market: Opportunities and Forecasts, 2015-2022" and the main point was that the global LIB market is expected to generate revenue of $46.21 billion by 2022, with a CAGR of 10.8% during the forecast period (2016)(2017)(2018)(2019)(2020)(2021)(2022). At a 37 percent revenue share, Li-ion is the battery of choice for portable devices and the electric vehicles. There are no other systems till now that threaten the market of LIB today [figure 2].Recently in 2017, John Goodenough, inventor of Li-ion battery has developed the first all-solid-state battery cells using sodium-or lithium-coated glass electrolyte and claimed that new battery cells have three times more energy density (1,200 charge-discharge cycles) in comparison to existing rechargeable batteries. He concluded that they store and transmit energy at temperatures (-20 o C to 60 o C) lower than traditional lithium-ion packs and can be made using globally abundant supplies of sodium. One advantage of this...

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“…Our value of the electrical percolation threshold is comparable with other GnP composites (5 vol% of GnP) 44 and is larger than other systems studied. In addition to this, many coworkers have reported comparable values of conductivity for polymer composites 45,46 …”

Section: Resultsmentioning

confidence: 57%

“…In addition to this, many coworkers have reported comparable values of conductivity for polymer composites. 45,46 Various reported values of DC conductivity in PVA based composite systems are represented in Table 2. In comparison with the earlier reported values for PVA based systems, 5,26,28,32,37,43,44 we have obtained one of the highest values of electrical conductivity reported in PVA-GnP systems.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Enhanced electrical conductivity and structural, mechanical characterization of standalone poly(vinyl alcohol)‐graphite nanoplatelets composite films

Janeesh

Meera

Shalom

et al. 2020

J of Applied Polymer Sci

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Polymer based nanocomposites are gaining attention in various fields of science and technology due to its tunable properties. In this work, we report for the first time, the preparation and study on electrical and mechanical properties of standalone poly(vinyl alcohol) (PVA) based graphite nanoplatelet (GnP) composite films using modified film casting technique. Our modified tape casting method can produce films with uniform thickness, and uniform dispersion of filler deprived of pinholes. This technique is scalable for the mass production of polymer composite films for device application. We have obtained a significant enhancement in the electrical conductivity of 9 orders of magnitude and a maximum value of 0.143 S/m using PVA-GnP composites. To the best of our knowledge, this increase is the highest among the reported values for PVA-GnP composite films. However, a reduction in crystallinity and tensile strength can be seen with the addition of GnP fillers. The maximum tensile strength obtained for PVA-GnP composite films was 15 MPa and is adequate for use in electronic applications and devices. The effect of filler addition in PVA is discussed in detail.

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Impedance and dielectric studies of nanocomposite polymer electrolyte systems using MMT and ferroelectric fillers

Cited by 12 publications

References 34 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

Insights into the use of polyethylene oxide in energy storage/conversion devices: a critical review

Enhanced electrical conductivity and structural, mechanical characterization of standalone poly(vinyl alcohol)‐graphite nanoplatelets composite films

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