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Recent Innovations in Chemical Engineering

Editor-in-Chief

ISSN (Print): 2405-5204
ISSN (Online): 2405-5212

Research Article

Structural, Vibrational, Electrical, Electrochemical and Capacitive Investigations on Ionic Liquid Doped P (VDF-HFP) + NaSCN Based Polymer Electrolytes

Author(s): Azemtsop T. Manfo, Pramod K. Singh, R.M. Mehra, R.C. Singh and Meenal Gupta*

Volume 14, Issue 1, 2021

Published on: 19 July, 2020

Page: [21 - 34] Pages: 14

DOI: 10.2174/2405520413999200719141337

Price: $65

Abstract

Background: Solid polymer electrolyte (SPEs) films based on poly (vinylidene fluoride-co-hexafluoropropylene) P(VDF–HFP) and sodium thiocyanate (NaSCN) are prepared using the solution casting technique.

Methods: Ionic liquid (IL; 1-ethyl-3-methyl-imidazolium tricyanomethanide ([EMIM] [TCM]) is incorporated into the prepared polymer-salt complex matrix to enhance its ionic conductivity further. Polarized optical microscopy (POM) shows a change in the surface morphology of IL doped polymer electrolyte films. The composite nature of polymer electrolyte films is confirmed using Fourier transform infrared (FT-IR) spectroscopy via studying ion-ion and ion-polymer interactions. The structural morphology of ionic liquid doped polymer electrolyte films (ILDPE) confirms the complexation between the ionic liquid ([EMIM][TCM]), salt (NaSCN) and polymer P(VDF-HFP). This is further confirmed using DSC and XRD measurements. The XRD structural analysis confirms that the intensity of crystalline peaks present in IL doped solid polymer electrolyte films decreases as compared to that of the pure polymer as well as polymer salt complex system. XRD clearly indicates the enhancement in its amorphous nature, which is necessary to increase the conductivity.

Results: The incorporation of IL into polymer salt-complex matrix leads to changes in the melting of polymer electrolytes, confirmed by DSC thermograms. Polymer electrolyte films are also characterized using impedance spectroscopy (IS) to check their electrical properties. The highest ionic conductivity is found to be 7.80×10-4 S cm-1 for 6 wt% IL doped polymer electrolyte film.

Conclusion: The Linear sweep voltammetry (LSV) analysis shows that the optimized polymer gel electrolyte is electrochemically stable up to 1.5 V. The calculated value of ionic transference number (tion) is found to be 0.985. A laboratory scale electrical double layer capacitor (EDLC) has been fabricated using this highly conducting polymer electrolyte film. The specific capacitance value is found to be 1.31 F g-1.

Keywords: Polymer electrolyte, electrical double layer capacitor, ionic transference number (tion), charge carriers, mobility, ionic conductivity.

Graphical Abstract
[1]
Ohno H. Electrochemical aspects of ionic liquids.VCH Interscience, New Jersey, 2005. J Am Chem Soc 2005; 127(33): 11878-8.
[2]
Wasserscheid P, Welton T. Ionic liquids in synthesis. Wiley 2007.
[http://dx.doi.org/10.1002/9783527621194]
[3]
Wilkis JS, Zaworotko MJ. Air and water stable 1-ethyl-3-methylimidazolium based ionic liquids. J Chem Soc Chem Commun 1992; 23: 965.
[http://dx.doi.org/10.1039/c39920000965]
[4]
Thinh NT, Yang YS, Oh IK. Adaptive neuro-fuzzy control of ionic polymer metal composite actuators. Smart Mater Struct 2009; 18(6)065016
[http://dx.doi.org/10.1088/0964-1726/18/6/065016]
[5]
Xu B, Yue S, Sui Z, et al. What is the choice for supercapacitors: Graphene or graphene oxide? Energy Environ Sci 2011; 4: 2826.
[http://dx.doi.org/10.1039/c1ee01198g]
[6]
Pandey GP, Hashmi SA. Solid-state supercapacitors with ionic liquid based gel polymer electrolyte: Effect of lithium salt addition. Electrochim Acta 2013; 105: 333.
[http://dx.doi.org/10.1016/j.electacta.2013.05.018]
[7]
Pandey GP, Liu T, Hancock C, Li Y, Sun XS, Li J. An ionic liquid incorporated in a quasi-solid-state electrolyte for high-temperature supercapacitor applications. J Power Sources 2016; 328: 510-9.
[http://dx.doi.org/10.1016/j.jpowsour.2016.08.032]
[8]
Yang X, Zhang F, Zhang L, Zhang T, Huang Y, Chen Y. High energy density of quasi-solid-state supercapacitor based on redox-mediated gel polymer electrolyte. Adv Funct Mater 2013; 23: 3353.
[http://dx.doi.org/10.1002/adfm.201203556]
[9]
Zhong X, Zhang L, Tang J, et al. cheng C, Xu B and Pan H. Efficient coupling of a hierarchical V 2 O 5@ Ni 3 S 2 hybrid nanoarray for pseudocapacitors and hydrogen production. J Mater Chem A Mater Energy Sustain 2017; 34.
[10]
Hu J, Xie K, Liu X, et al. Dramatically enhanced ion conductivity of gel polymer electrolyte for supercapacitor via h-BN nanosheets doping. Electrochim Acta 2017; 227: 455.
[http://dx.doi.org/10.1016/j.electacta.2017.01.045]
[11]
Pandey GP, Hashmi SA, Kumar YJ. Multi walled carbon nanotube electrodes for electrical double layer capacitors with ionic liquid based gel polymer electrolytes. Electrochem Soc 2010; 157(1): A105-14.
[http://dx.doi.org/10.1149/1.3258317]
[12]
Yamazaki S, Takegawa A, Kaneko Y, Kadokawa J-i, Yamagata M, Ishikawa M. Performance of electric double-layer capacitor with acidic cellulose–chitin hybrid gel electrolyte. J Electrochem Soc 2010; 157: A203.
[http://dx.doi.org/10.1149/1.3270498]
[13]
Fang J, Qiao J, Wilkinson DP, Zhang J, Eds. Electrochemical Polymer Electrolyte Membranes. CRC Press 2015.
[http://dx.doi.org/10.1201/b18369]
[14]
Pandey GP, Hashmi SA, Kumar Y. Multiwalled carbon nanotube electrodes for all solid state electrical double layer capacitors with ionic liquid based gel polymer electrolyte. J Electrochem Soc 2010; 157: 105-14.
[http://dx.doi.org/10.1149/1.3258317]
[15]
Wang Y, Song Y, Xia Y. Electrochemical capacitors: mechanism, materials, systems, characterization and applications. Chem Soc Rev 2016; 45(21): 5925-50.
[http://dx.doi.org/10.1039/C5CS00580A PMID: 27545205]
[16]
Choi BG, Chang SJ, Kang HW, et al. High performance of a solid-state flexible asymmetric supercapacitor based on graphene films. Nanoscale 2012; 4(16): 4983-8.
[http://dx.doi.org/10.1039/c2nr30991b PMID: 22751863]
[17]
Miao R, Liu B, Zhu Z, Liu Y, Li J, Wang X. J Power Sources 2008; 184: 420.
[http://dx.doi.org/10.1016/j.jpowsour.2008.03.045]
[18]
Stephan A, Nahm K. Review on composite polymer electrolytes for lithium batteries. Polymer (Guildf) 2006; 47: 5952.
[http://dx.doi.org/10.1016/j.polymer.2006.05.069]
[19]
Stephan AM, Kumar S, Renganathan N, Kulandainathan M. Characterization of poly (vinylidene fluoride hexafluoro propylene)(PVDF-HFP) electrolytes complexed with different lithium salts. Eur Polym J 2005; 41: 15.
[http://dx.doi.org/10.1016/j.eurpolymj.2004.09.001]
[20]
Karandikar PB, Talange DB, Mhaskar UP, et al. Development, modeling and characterization of aqueous metal oxide based supercapacitor. Energy 2012; 40: 131-8.
[http://dx.doi.org/10.1016/j.energy.2012.02.020]
[21]
Singh R, Singh PK, Tomar SK, Bhattacharya B. Synthesis,characterization, and dye-sensitized solar cell fabrication using solid biopolymer electrolyte membranes. High Perform Polym 2015; 28: 47-54.
[http://dx.doi.org/10.1177/0954008315569252]
[22]
Sampath KL, Christopher SPS, Perumal P, Chitra R, Muthukrishnan M. Synthesis and characterization of biopolymer electrolyte based on tamarind seed polysaccharide, lithium perchlorate and ethylene carbonate for electrochemical applications. Ionics (Kiel) 2019; 25: 1067-82.
[http://dx.doi.org/10.1007/s11581-019-02857-1]
[23]
Pratap R, Singh B, Chandra S. Polymeric rechargeable solid-state proton battery. J Power Sources 2006; 161: 702-6.
[http://dx.doi.org/10.1016/j.jpowsour.2006.04.020]
[24]
Ike IS, Sigalas I, Iyuke S. Understanding performance limitation and suppression of leakage current or self-discharge in electrochemical capacitors: a review. Phys Chem Chem Phys 2016; 18(2): 661-80.
[http://dx.doi.org/10.1039/C5CP05459A PMID: 26659405]
[25]
Singh R, Singh PK, Tomar SK, Bhattacharya B. Synthesis, characterization, and dye-sensitized solar cell fabrication using solid biopolymer electrolyte membranes. High Perform Polym 2015; 28: 47-54.
[http://dx.doi.org/10.1177/0954008315569252]
[26]
Kadir MFZ, Arof AK. Applications of PVA-chitosan blend polymer electrolyte membrane in electrical double layer capacitor. Mater Res Innov 2013; 15: 217-20.
[http://dx.doi.org/10.1179/143307511X13031890749299]
[27]
Pandey GP, Kumar Y, Hashmi SA. Ionic liquid incorporated PEO based polymer electrolyte for electrical double layer capacitors: A comparative study with lithium and magnesium systems. Solid State Ion 2011; 190: 93-8.
[http://dx.doi.org/10.1016/j.ssi.2011.03.018]
[28]
Hashmi S, Latham RJ, Linford R, Schlindwein W. Polymer electrolyte based solid state redox supercapacitors with poly (3-methyl thiophene) and polypyrrole conducting polymer electrodes. Ionics 1997; 3: 177-83.
[http://dx.doi.org/10.1007/BF02375614]

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