Electrical studies on ionic liquid-based gel polymer electrolyte for its application in EDLCs

Tripathi, Mukta; Tripathi, Santosh Kumar

doi:10.1007/s11581-017-2051-8

Cited by 49 publications

(31 citation statements)

References 35 publications

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“…The conductivity of prepared electrolyte was optimized as a function of concentration of TEABF 4 salt. The highest conductivity was obtained for 1.0 M concentration of salt [18]. The PGE containing the liquid electrolyte was prepared.…”

Section: Preparation Of Electrolytesmentioning

confidence: 99%

“…Figure 3 shows the variation of conductivity as a function of weight ratio of EC-PC-TEABF 4 . The conductivity of the host polymer PVDF-HFP, which is of the order of 10 −10 S cm −1 , increases on addition of the liquid electrolyte system [EC-PC-TEABF 4 ] that has conductivity approximately 10 −2 S cm −1 for 1.0 M concentration of TEABF 4 [18]. The conductivity of PGE system exhibits maxima at 80 wt% concentration of EC-PC-TEABF 4 .…”

Section: Room Temperature Ionic Conductivitymentioning

confidence: 99%

“…Conductivity is enhanced due to the dissociation of salt ions TEA + and BF − 4 in PGE system. In an amorphous PVDF-HFP, the polymer chain assists the movement of dissociated ions resulting in higher ionic conductivity [18,20]. The conductivity at room temperature, 295 K, for an optimized system [PVDF-HFP (20 wt%) + EC-PC-TEABF 4 (80 wt%)] is approximately 4.0 × 10 −3 S cm −1 , which makes prepared PGE a good candidate for application in EDLCs.…”

Section: Room Temperature Ionic Conductivitymentioning

confidence: 99%

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Preparation of polyvinylidene fluoride-co-hexafluoropropylene-based polymer gel electrolyte and its performance evaluation for application in EDLCs

2019

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Polymer gel electrolyte (PGE) film is prepared by incorporating polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) as polymer, ethylene carbonate (EC)-propylene carbonate (PC) as plasticizers and tetraethylammonium tetrafluoroborate (TEABF 4) as salt using solution cast technique. By varying weight percentages of EC-PC-TEABF 4 into a host polymer, different samples of PGE were prepared, and the concentration of EC-PC-TEABF 4 was optimized for maximum conductivity, and stability of the prepared film. The maximum ionic conductivity of the order of 4.9 × 10 −3 S cm −1 was determined for 80 wt% of [EC-PC (1:1 v/v)-TEABF 4 (1.0 M)]. From the conductivity as a function of temperature, activation energy E a was calculated and it is about 0.06 eV. Overall, the amorphous structure was confirmed by X-ray diffraction analysis. Dielectric and impedance spectroscopic analysis was also carried out to understand the electrical behaviour of electrolyte using modified Debye's function. An ionic character of prepared electrolyte was confirmed from DC polarization method. The ionic transference number of 0.91 was calculated from the data while the electrical potential stability window was found to be 3.8 V. The electrical performance of prepared PGE was examined by fabricating electrical double-layer capacitor (EDLC). In a supercapacitor, commercially procured activated carbon electrodes were employed. The specific capacitance of EDLC cell is found to be ∼60 mF cm −2 , and equivalent single-electrode capacitance is about 39 F g −1 .

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Section: Preparation Of Electrolytesmentioning

confidence: 99%

Section: Room Temperature Ionic Conductivitymentioning

confidence: 99%

Section: Room Temperature Ionic Conductivitymentioning

confidence: 99%

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Preparation of polyvinylidene fluoride-co-hexafluoropropylene-based polymer gel electrolyte and its performance evaluation for application in EDLCs

2019

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“…The internal cell resistance is also higher in the case of neat ionic liquid based cell B. This value is higher than the sum of bulk resistance and charge transfer resistance calculated from impedance spectra in both the cases . The values of energy and power densities are also slightly lower in neat ionic liquid based cell B.…”

Section: Resultsmentioning

confidence: 70%

Comparative Studies on Ionic Liquid and Polymer Ionic Liquid Blend for Application in EDLCs

Tripathi

Bobade

Gupta

et al. 2019

Macromolecular Symposia

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In the present work, comparative studies on two ion-conducting materials, 1-butyl-3-methylimidazolium chloride (BMIMCl) as ionic liquid (IL) and polymer ionic liquid blend, are reported. For the synthesis of polymer ionic liquid blend system, BMIMCl as ionic liquid, PVDF-HFP and acetonitrile as a solvent are used. The different polymer ionic liquid blend is prepared by adopting universal solution cast technique and electrolyte sample is optimized mixing IL in the polymer by maintaining ratio 1:4. The impedance plot is observed by LCR Hi-TESTER. The optimized sample of electrolyte system shows higher ionic conductivity of the order ≈10 −3 S cm −1 . The Arrhenius behavior is found from the temperature dependence conductivity plot, giving activation energy of E a ≈ 0.073 eV. The ionic transference number is calculated for IL and optimized polymer ionic liquid blend. Electrical potential window stability is observed for IL and polymer ionic liquid blend. The fabrication of electrochemical double layer capacitors (EDLCs) is done by sandwiching ion conducting materials between two carbon electrodes. The specific capacitance of EDLC cell: AC ||(PVDF-HFP (20 wt%) + (BMIMCl) (80 wt%)|| AC and AC ||BMIMCl|| AC, gives highest capacitance value ≈116.9 and 96.5 mF cm −2 equivalent to single electrode capacitance 54.57 and 52.6 F g −1 , respectively, by cyclic voltammetry studies at 1 mV s −1 scan rate.

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“…Recently ionic liquids (ILs) have been employed increasingly in energy storage devices to improve their performances and great attractions due to the high thermal, chemical and electrochemical stability, low toxicity with good ionic conductivity, introduced them as an ideal material for SC applications. Moreover ionic liquids have been enthusiastically applied as electrolytes because of their wide potential window [16][17][18][19][20][21][22][23][24][25]. In addition, ionic liquids have also low viscosities with high conductivities advantages made them to employ in electrochemical devices for fast charge-discharge conditions.…”

Section: Introductionmentioning

confidence: 99%

Electroactive Conjugated Polymer / Magnetic Functional Reduced Graphene Oxide for Highly Capacitive Pseudocapacitors: Electrosynthesis, Physioelectrochemical and DFT Investigation

Ehsani

Safari

Yazdanpanah

et al. 2018

J. Electrochem. Sci. Technol

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The current study fabricated magnetic functional reduced graphene oxide (MFRGO) by relying on FeCl 4-magnetic anion confined to cationic 1-methyl imidazolium. Furthermore, for improving the electrochemical performance of conductive polymer, hybrid poly ortho aminophenol (POAP)/ MFRGO films have then been fabricated by POAP electropolymerization in the presence of MFRGO nanorods as active electrodes for electrochemical supercapacitors. Surface and electrochemical analyses have been used for characterization of MFRGO and POAP/ MFRGO composite films. Different electrochemical methods including galvanostatic charge discharge experiments, cyclic voltammetry and electrochemical impedance spectroscopy have been applied to study the system performance. Prepared composite film exhibited a significantly high specific capacity, high rate capability and excellent cycling stability (capacitance retention of ~91% even after 1000 cycles). These results suggest that electrosynthesized composite films are a promising electrode material for energy storage applications in high-performance pseudocapacitors.

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Electrical studies on ionic liquid-based gel polymer electrolyte for its application in EDLCs

Cited by 49 publications

References 35 publications

Preparation of polyvinylidene fluoride-co-hexafluoropropylene-based polymer gel electrolyte and its performance evaluation for application in EDLCs

Preparation of polyvinylidene fluoride-co-hexafluoropropylene-based polymer gel electrolyte and its performance evaluation for application in EDLCs

Comparative Studies on Ionic Liquid and Polymer Ionic Liquid Blend for Application in EDLCs

Electroactive Conjugated Polymer / Magnetic Functional Reduced Graphene Oxide for Highly Capacitive Pseudocapacitors: Electrosynthesis, Physioelectrochemical and DFT Investigation

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