Structural and Electrochemical Analysis of PMMA Based Gel Electrolyte Membranes

Mathew, Chithra M.; Kesavan, K.; Rajendran, S.

doi:10.1155/2015/494308

Cited by 36 publications

(11 citation statements)

References 25 publications

(21 reference statements)

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“…This is especially evident in recordings for a conical nanopore shown in Figure 4c; its opening diameter of 44 nm assures that the pore walls surface charges are screened, thus the pore's transport properties are dominated by the gel. It is known that PMMA gel has mostly an amorphous character, 47 which is partially dependent on its composition both in terms of PMMA and electrolyte concentration. Previous studies also revealed that even in bulk PMMA gels doped with salts, the measured current is primarily due to anions with transference numbers for lithium of ∼0.2.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…This is especially evident in recordings for a conical nanopore shown in Figure c; its opening diameter of 44 nm assures that the pore walls surface charges are screened, thus the pore’s transport properties are dominated by the gel. It is known that PMMA gel has mostly an amorphous character, which is partially dependent on its composition both in terms of PMMA and electrolyte concentration. Previous studies also revealed that even in bulk PMMA gels doped with salts, the measured current is primarily due to anions with transference numbers for lithium of ∼0.2. , The low transference numbers can be caused by interactions of Li + with carbonyl groups in PMMA; complexation of Li + ions with the gel was indeed demonstrated experimentally using, e.g., XRD, FT-IR, and Raman spectroscopy. ,− We hypothesize that the complexed ions can lead to the formation of effective positive surface charge of the gel matrix, whose presence is suggested by I–V curves of nanopores filled with PMMA.…”

Section: Resultsmentioning

confidence: 99%

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Solid-State Ionic Diodes Demonstrated in Conical Nanopores

et al. 2017

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Ionic transport at the nanoscale features phenomena that are not observed in larger systems. Nonlinear current− voltage curves characteristic of ionic diodes as well as ion selectivity are examples of effects observed at the nanoscale. Many manmade nanopore systems are inspired by biological channels in a cell membrane, thus measurements are often performed in aqueous solutions. Consequently, much less is known about ionic transport in nonaqueous systems, especially in solid-state electrolytes. Here we show ionic transport through single pores filled with gel electrolyte of poly(methyl methacrylate) (PMMA) doped with LiClO 4 in propylene carbonate. The system has no liquid interface and the ionic transport occurs through the porous gel structure. We demonstrate that a conically shaped nanopore filled with the gel rectifies the current and works as a solid-state ionic diode.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Solid-State Ionic Diodes Demonstrated in Conical Nanopores

et al. 2017

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“…This is because the periodical reversal of the field takes place so rapidly that the charge carriers will hardly be able to orient themselves in the field direction, which results in a decrease in the dielectric constant [15]. In addition, the dielectric constant decreases, as the frequency increases, for all concentrations may be due to the relaxation process [16]. A variation of the dielectric losses for (PVA-PAA-PbO 2 ) nanocomposites with the frequency is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Hashim

Hadi

2018

Ukr. J. Phys.

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This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

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“…Hence the ionic conductivity of the gel polymer electrolyte is due to the amorphous phase of the complex with zinc triflate salt dissolved in the amorphous region of the polymer in the presence of ionic liquid EMIMTFSI. Thus the amorphous nature of the gel films due to the incorporation of additives like ionic salt and plasticizer averts the reorganization of the crystalline region thereby leading to an improved ionic conductivity [31,32].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Effective influences of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) ionic liquid on the ion transport properties of micro-porous zinc-ion conducting poly (vinyl chloride) /poly (ethyl methacrylate) blend-based polymer electrolytes

Prasanna

Suthanthiraraj

2016

J Polym Res

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A series of new gel polymer electrolytes (GPEs) based on different concentrations of a hydrophobic ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) entrapped in an optimized typical composition of polymer blend-salt matrix [poly(vinyl chloride) (PVC) (30 wt%) / poly(ethyl methacrylate) (PEMA) (70 wt%) : 30 wt% zinc triflate Zn(CF 3 SO 3 ) 2 ] has been prepared using facile solution casting technique. The AC impedance analysis has revealed the occurrence of the maximum ionic conductivity of 1.10 × 10 −4 Scm −1 at room temperature (301 K) exhibited by the PVC/PEMA-Zn(OTf) 2 system containing 80 wt% ionic liquid. The addition of EMIMTFSI into the optimized PVC/ PEMA-Zn(OTf) 2 system in different weight percentages enhances the number of free zinc ions thereby leading to enrichment of ionic conductivity. The structural and complexation behaviour of the as prepared polymer gel electrolytes was substantiated by subjecting these electrolyte films to X-ray diffraction (XRD) and Attenuated total reflectance -Fourier transformed infrared (ATR-FTIR) investigations. The wider electrochemical stability window~3.23 V and a reasonable cationic transference number (t Zn 2+ ) of 0.63 have been attained for the polymer gel electrolyte film containing higher loading of (80 wt%) ionic liquid. The development of the amorphous phase of these gel polymer electrolyte membranes with increasing ionic liquid content was observed from scanning electron microscopic (SEM) analysis. The results of the current work divulge the assurance of developing GPEs based on ionic liquids for prospective application in zinc battery systems.

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Structural and Electrochemical Analysis of PMMA Based Gel Electrolyte Membranes

Cited by 36 publications

References 25 publications

Solid-State Ionic Diodes Demonstrated in Conical Nanopores

Solid-State Ionic Diodes Demonstrated in Conical Nanopores

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Effective influences of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) ionic liquid on the ion transport properties of micro-porous zinc-ion conducting poly (vinyl chloride) /poly (ethyl methacrylate) blend-based polymer electrolytes

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