Cellulose acetate–lithium bis(trifluoromethanesulfonyl)imide solid polymer electrolyte: ATR-FTIR and ionic conductivity behavior

Solid polymer electrolytes (SPEs) based on cellulose acetate (CA) doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt are prepared by solution cast technique. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy of the polymer salt complexes are recorded in the frequency range between 400 cm-1 and 4000 cm-1. The shifting of carbonyl band ( C=O ) at 1737 cm-1 to a lower wavenumber confirms the occurrence of complexation between the polymer and the salt. The electrochemical impedance spectroscopy (EIS) analysis discovered that the film with 25 wt.% of salt shows the highest ionic conductivity at room temperature. The change in real dielectric permittivity (εr) as a function of frequency at different salt concentrations which exhibits a dispersive behavior at low frequencies and decays at higher frequencies, shows the electrode polarization and space charge effect. The real modulus formalism (Mr) analysis shows that the polymer electrolytes in this work are ionic conductors.

Download Full-text

Polyvinyl fibers as outperform candidature in the solid polymer electrolytes

Journal of Industrial Textiles ◽

10.1177/1528083720970620 ◽

2020 ◽

pp. 152808372097062

Author(s):

Muhammad Yameen Solangi ◽

Umair Aftab ◽

Muhammad Ishaque ◽

Aqeel Bhutto ◽

Ayman Nafady ◽

...

Keyword(s):

Thermal Stability ◽

Weight Loss ◽

Ionic Conductivity ◽

Polymer Electrolytes ◽

Vital Role ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Main Challenge ◽

Different Temperatures ◽

Solution Cast

Solid polymer electrolytes (SPEs) are the best choice to replace liquid electrolytes in supercapacitors, fuel cells, solar cells and batteries. The main challenge in this filed is the ionic conductivity and thermal stability of SPEs which is still not up to mark, therefore more investigations are needed to address these issues. In this study, PVA/salt based SPEs was fabricated using both solution cast and electro-spinning methods to probe the effect of different salts such as (NaCl, KCl and KI) and their concentrations on the ionic conductivity. Scanning electron microscopy (SEM) x and Fourier Transform Infra-Red (FTIR) have been employed to study the morphology as well as the different functional groups of SPEs, respectively. It was noted that small addition of NaCl, KCl and KI salts in SPEs dramatically increased the ionic conductivity to 5.95×10−6, 5.31×10−6 and 4.83×10−6 S/cm, respectively. Importantly, the SPEs obtained with NaCl via electro-spinning have higher ionic conductivity (5.95×10−6 S/cm) than their casted SPEs (1.87×10−6 S/cm). Thermal stability was also studied at two different temperatures i.e. 80 °C and 100 °C. The weight loss percentage of electrospun SPEs have zero percent weight loss than the solution based SPEs. The combined results clearly indicated that the nature of salt, concentration and fabrication process play a vital role in the ionic conductivity. Also, the NaCl salt with low molecular weight at low concentrations shows an enhanced ionic conductivity.

Download Full-text

Salt Concentration Effect on Electrical and Dielectric Properties of Solid Polymer Electrolytes based Carboxymethyl Cellulose for Lithium-ion Batteries

Biointerface Research in Applied Chemistry ◽

10.33263/briac125.61146123 ◽

2021 ◽

Vol 12 (5) ◽

pp. 6114-6123

Keyword(s):

Dielectric Properties ◽

Ionic Conductivity ◽

Polymer Electrolytes ◽

Carboxymethyl Cellulose ◽

Electrochemical Impedance ◽

Lithium Ion ◽

Lithium Perchlorate ◽

Linear Sweep Voltammetry ◽

Solid Polymer Electrolytes ◽

Solid Polymer

Solid polymer electrolytes (SPEs) based carboxymethyl cellulose (CMC) with lithium perchlorate (LiClO4) were prepared via solution drop-cast technique. The CMC host is complexed by different concentrations of LiClO4 salt. SPEs were characterized by Electrochemical Impedance Spectroscopy (EIS) and Linear Sweep Voltammetry (LSV) in coin cells with lithium metal electrodes. EIS performed unique results based on various ionic conductivity values and dielectric properties. The higher ionic conductivity (1.32 × 10-5 S/cm) was obtained by SPEs 2 following by short-range ionic transport results based on dielectric properties depending on frequency. SPEs with LiClO4 addition are electrochemically stable over 2 V in lithium battery coin cells from LSV results.

Download Full-text

Ionic conductivity of MG30-PEMA Blend Solid Polymer Electrolyte

Scientific Research Journal ◽

10.24191/srj.v12i2.9395 ◽

2015 ◽

Vol 12 (2) ◽

pp. 83

Author(s):

Siti Fadzilah Ayub ◽

Khuzaimah Nazir ◽

Ahmad Fairuz Aziz ◽

Siti Irma Yuana Saaid ◽

Muhd Zu Azhan Yahya ◽

...

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Sample Surface ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

X Ray Diffraction ◽

Salt Composition ◽

X Ray ◽

Solution Cast ◽

Cast Technique

This paper presents on ionic conductivity of MG30-PEMA blend solid polymer electrolytes (SPEs) prepared by solution cast technique. The analysis has shown that conductivity increases with the increasing salt composition. It is observed via x-ray diffraction analysis that the crystallinity of the sample decreased with the amount of salt composition as expected It is also observed that the dielectric value increases with increasing amount of LiCF3SO3 in the sample. Surface morphology revealed that ion aggregation occurred after optimum conductivity which has lowered the conductivity.

Download Full-text

Ionic conductivity of MG30-PEMA Blend Solid Polymer Electrolyte

Scientific Research Journal ◽

10.24191/srj.v12i2.5433 ◽

2015 ◽

Vol 12 (2) ◽

pp. 83

Author(s):

Siti Fadzilah Ayub ◽

Khuzaimah Nazir ◽

Ahmad Fairuz Aziz ◽

Siti Irma Yuana Sheikh Mohd Saaid ◽

Muhd Zu Azhan Yahya ◽

...

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Sample Surface ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

X Ray Diffraction ◽

Salt Composition ◽

X Ray ◽

Solution Cast ◽

Cast Technique

Download Full-text

Solid Polymer Electrolytes from Crosslinked PEG and Dilithium N,N'-Bis(trifluoromethanesulfonyl)perfluoroalkane-1,ω-disulfonamide and Lithium Bis(trifluoromethanesulfonyl)imide Salts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20081777 ◽

2008 ◽

Vol 73 (12) ◽

pp. 1777-1798 ◽

Cited By ~ 1

Author(s):

Olt E. Geiculescu ◽

Rama V. Rajagopal ◽

Emilia C. Mladin ◽

Stephen E. Creager ◽

Darryl D. Desmarteau

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Minimum Energy ◽

Ionic Conductivities ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Segmental Motion ◽

Concentrated Electrolytes ◽

Two Factors ◽

Poly Ethylene

The present work consists of a series of studies with regard to the structure and charge transport in solid polymer electrolytes (SPE) prepared using various new bis(trifluoromethanesulfonyl)imide (TFSI)-based dianionic dilithium salts in crosslinked low-molecular-weight poly(ethylene glycol). Some of the thermal properties (glass transition temperature, differential molar heat capacity) and ionic conductivities were determined for both diluted (EO/Li = 30:1) and concentrated (EO/Li = 10:1) SPEs. Trends in ionic conductivity of the new SPEs with respect to anion structure revealed that while for the dilute electrolytes ionic conductivity is generally rising with increased length of the perfluoroalkylene linking group in the dianions, for the concentrated electrolytes the trend is reversed with respect to dianion length. This behavior could be the result of a combination of two factors: on one hand a decrease in dianion basicity that results in diminished ion pairing and an enhancement in the number of charge carriers with increasing fluorine anion content, thereby increasing ionic conductivity while on the other hand the increasing anion size and concentration produce an increase in the friction/entanglements of the polymeric segments which lowers even more the reduced segmental motion of the crosslinked polymer and decrease the dianion contribution to the overall ionic conductivity. DFT modeling of the same TFSI-based dianionic dilithium salts reveals that the reason for the trend observed is due to the variation in ion dissociation enthalpy, derived from minimum-energy structures, with respect to perfluoroalkylene chain length.

Download Full-text

Electrical Conduction Mechanism in Solid Polymer Electrolytes: New Concepts to Arrhenius Equation

Journal of Soft Matter ◽

10.1155/2013/323868 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 64

Author(s):

Shujahadeen B. Aziz ◽

Zul Hazrin Z. Abidin

Keyword(s):

Dielectric Constant ◽

Polymer Electrolytes ◽

Conduction Mechanism ◽

Dc Conductivity ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Arrhenius Behavior ◽

Different Temperatures ◽

Solution Cast ◽

The Fourier Transform

Solid polymer electrolytes based on chitosan NaCF3SO3 have been prepared by the solution cast technique. X-ray diffraction shows that the crystalline phase of the pure chitosan membrane has been partially disrupted. The fourier transform infrared (FTIR) results reveal the complexation between the chitosan polymer and the sodium triflate (NaTf) salt. The dielectric constant and DC conductivity follow the same trend with NaTf salt concentration. The increase in dielectric constant at different temperatures indicates an increase in DC conductivity. The ion conduction mechanism follows the Arrhenius behavior. The dependence of DC conductivity on both temperature and dielectric constant (σdc(T,ε′)=σ0e−Ea/KBT) is also demonstrated.

Download Full-text

Characterization of Plasticized PMMA-LiClO4 Solid Polymer Electrolytes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.585.185 ◽

2012 ◽

Vol 585 ◽

pp. 185-189 ◽

Cited By ~ 3

Author(s):

Rajni Sharma ◽

Anjan Sil ◽

Subrata Ray

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Thermal Analyses ◽

Impedance Analysis ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Casting Technique ◽

Ac Impedance Analysis ◽

Solution Casting Technique

In the present work, the effect of Li salt i.e. LiClO4 contained in composite plasticizer (PC+DEC) with three different concentrations on ionic transport and other electrochemical properties of PMMA based gel polymer electrolytes synthesized has been investigated. The electrolytes have been synthesized by solution casting technique by varying the wt (%) of salt and plasticizer. The formation of polymer-salt complexes and their structural characterization have been carried out by FTIR spectroscopic and XRD analyses. The room temperature ionic conductivity of the electrolyte composition 0.6PMMA-0.125(PC+DEC)-0.15LiClO4 (wt %) has been found to be maximum whose magnitude is 0.40×10-5 S/cm as determined by ac impedance analysis. The temperature dependent ionic conductivity of electrolyte sample0.6PMMA-0.125(PC+DEC)-0.15LiClO4 has further been investigated. Thermal analyses of electrolyte samples of all three compositions have also been done.

Download Full-text