scholarly journals DC Conductivity and Transference number in pure and potassium thiocyanate-doped polyvinyl alcohol films

2019 ◽  
Vol 16 (2) ◽  
pp. 136-141
Author(s):  
N. Nagaraj ◽  
P. Mohan Babu ◽  
K. V. Ramesh Babu
Keyword(s):  
Charge Transport ◽  
Polymer Electrolyte ◽  
Transference Number ◽  
Potassium Thiocyanate ◽  
Dc Conductivity ◽  
Transference Numbers ◽  
Poly Vinyl Alcohol ◽  
Electrolyte System ◽  
Solution Cast ◽  
Cast Technique

Poly (vinyl alcohol) (PVA) – based solid electrolyte films with potassium thiocyanate (KSCN) were prepared by solution-cast technique. The pure and KSCN- doped PVA films have been investigated for the charge transport mechanism in the polymer electrolyte system by using the DC conductivity (The composition dependence and temperature dependence in 300-385K range) and transference number measurements. The graphs related to conductivity – temperature shows that an increase in conductivity with respect to rise in the temperature. At room temperature, the conductivity of the (PVA+KSCN) electrolyte is 102 times greater than that of pure PVA. The transference number data exhibit that the charge transport in this polymer electrolyte system is predominantly due to ions. The ionic transference numbers (tion) lies in the range of 0.92 to 0.99 for the films of PVA with KSCN in the wt% ratios (90:10), (80:20) and (70:30).

scholarly journals Thermal, Structural and Morphology Studies of PEO-LICF3SO3-DBP-ZrO2 Nanocomposite Polymer Electrolytes

2021 ◽  
Vol 1 (1) ◽  
pp. 1-17
Author(s):  
Siti Mariah Mohd Yasin ◽  
Mohd Rafie Johan
Keyword(s):  
Polymer Electrolyte ◽  
Milling Process ◽  
Degree Of Crystallinity ◽  
Electrolyte System ◽  
Scanning Calorimetry ◽  
Nanocomposite Polymer ◽  
Transmission Electron ◽  
Solution Cast ◽  
Oxide Particles ◽  
Cast Technique

This work represents thermal study of PEO-based polymer electrolyte films that were prepared by the solution cast technique. The melting temperature Tm, glass transition temperature Tg and degree of crystallinity χc were measured by diffraction scanning calorimetry (DSC). Thermogravimetric (TGA) was used to determine the initial and final degradation temperatures. The structural was also performed to characterize the vibrational wavelength and phase characteristic (crystalline/amorphous). While the morphological study was emphasized to examine the features appearance for pure polymer electrolyte system as well as after addition salt, plasticizer and filler. The zirconium oxide particles were measured after the milling process by using the transmission electron microscopy (TEM), and the particles obtained in the range of 9 – 54 nanometer size.

scholarly journals Tailoring the Structural, Morphological, Electrochemical, and Dielectric Properties of Solid Polymer Electrolyte

2018 ◽  
Author(s):  
Anil Arya
Keyword(s):  
Dielectric Properties ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Interaction Mechanism ◽  
Transference Number ◽  
Dielectric Strength ◽  
Solid Polymer ◽  
Solution Cast ◽  
Standard Solution ◽  
Cast Technique

Herein, we present preparation of solid polymer electrolyte (SPE) comprising of PEO, NaPF6 and varying fraction of Succinonitrile (SN) by standard solution cast technique. The morphological features and structural properties were studied by the FESEM, XRD, respectively. FTIR was performed to study the interactions between polymer host, salt, and SN. Impedance spectroscopy, Transference number measurements, LSV and CV were used to examine the electrochemical properties. The complex permittivity/conductivity & modulus were studied to understand the dielectric properties by evaluating the dielectric strength, relaxation time, hopping frequency and dc conductivity. Based on the experimental results an interaction mechanism is presented.

scholarly journals Preparation and Characterization of Nano-Dy2O3-Doped PVA + Na3C6H5O7 Polymer Electrolyte Films for Battery Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
J. Ramesh Babu ◽  
K. Ravindhranath ◽  
K. Vijaya Kumar
Keyword(s):  
Polymer Electrolyte ◽  
Transference Number ◽  
Open Circuit ◽  
Composite Polymer Electrolyte ◽  
Electrochemical Cells ◽  
Dsc Studies ◽  
A Value ◽  
The Matrix ◽  
Solution Cast ◽  
Ion Movements

Composite polymer electrolyte films containing various concentrations of nano-Dy2O3 (1.0 to 4.0%) in PVA + sodium citrate (90 : 10) are synthesized adopting solution cast method and are characterized using FTIR, XRD, SEM, and DSC techniques. The investigations indicate that all components are homogenously dispersed. Films containing 3% of nano-Dy2O3 are more homogenous and less crystalline, and the same is supported by DSC studies indicating the friendly nature to ionic conductivity. Transference number studies reveal that the major charge carriers are ions. With the increase in % of nano-Dy2O3, the conductivity increases and reaches maximum in 3% film with a value of 1.06 × 10−4 S/cm (at 303 K). Further, the conductivity of the film increases with raise in temperature due to the hopping of interchain and intrachain ion movements and fall in microscopic viscosity at the matrix interface of the film. Electrochemical cells are fabricated using these films with the configuration “anode (Mg + MgSO4)/[PVA (90%) + Na3C6H5O7 (10%) + (1–4% nano-Dy2O3)]/cathode (I2 + C + electrolyte),” and various discharge characteristics are evaluated. With 3% nano-Dy2O3 film, the maximum discharge time of 118 hrs with open-circuit voltage of 2.68 V, power density of 0.91 W/kg, and energy density of 107.5 Wh/kg are observed. These findings reflect the successful adoption of the developed polymer electrolyte films in electrochemical cells.

scholarly journals Increase of Solid Polymer Electrolyte Ionic Conductivity Using Nano-SiO2 Synthesized from Sugarcane Bagasse as Filler

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4240
Author(s):  
Yatim Lailun Ni’mah ◽  
Zakkiyyah Hidayatul Muhaiminah ◽  
Suprapto Suprapto
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Sugarcane Bagasse ◽  
Solid Polymer Electrolyte ◽  
Sol Gel ◽  
Solid Polymer ◽  
Elongation At Break ◽  
Nano Sio2 ◽  
Solution Cast ◽  
Cast Technique

The synthesize of solid polymer electrolyte (SPE) based on polyethylene oxide (PEO), NaClO4 and nano-SiO2 was carried out by solution cast technique. Nano-SiO2 was synthesized from sugarcane bagasse using sol-gel method. FTIR analysis was carried out to investigate the bonding between nano-SiO2 and PEO/NaClO4. The morphology of the SPE was characterized using SEM. XRD and DSC analysis showed that SPE crystallinity decreased as nano-SiO2 concentration was increased. Mechanical analyses were conducted to characterize the SPE tensile strength and elongation at break. EIS analysis was conducted to measure SPE ionic conductivity. The PEO/NaClO4 SPE with the addition of 5% nano-SiO2 from sugarcane bagasse at 60 °C produced SPE with the highest ionic conductivity, 1.18 × 10−6 S/cm. It was concluded that the addition of nano-SiO2 increased ionic conductivity and interface stability at the solid polymer electrolyte-PEO/NaClO4.

Investigation of Electrical Properties, Structure and Morphological Characterization of Mg+2 Ions Conducting Solid Polymer Electrolyte Based on Poly(vinyl alcohol)

2017 ◽  
Vol 6 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Reda Khalil ◽  
Eslam Mohamed Sheha ◽  
Alaa Eid
Keyword(s):  
Polymer Electrolyte ◽  
Vinyl Alcohol ◽  
Solid Polymer Electrolyte ◽  
Transference Number ◽  
Morphological Characterization ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Electrolyte Component

In the present work, solid polymer electrolyte using poly(vinyl alcohol) (PVA) and magnesium perchlorate (Mg(ClO4)2) in different compositions has been prepared by the solution-casting technique method. Surface feature of films was characterized by scanning electron microscopy (SEM) measurement. X-ray diffraction (XRD) was used to determine the complexation of the polymer with the salt. The electrophysical characteristics were measured and analyzed as dependent on the concentration, nature of the solid polymer electrolyte component and ambient temperature. A maximum ionic conductivity value of ∼10–4 S/cm at 303 K is obtained for PVA0.6/(Mg(ClO4)2)0.4 composite. The ionic transference number of Mg+2 mobile ions has been estimated by a dc polarization method. The result reveals that the conducting species are predominantly ions.

Impedance Behavior of Treated Methyl-Grafted Natural Rubber Polymer Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 217-222 ◽  
Author(s):  
Ahmad Fairoz Aziz ◽  
Khuzaimah Nazir ◽  
Siti Fadzilah Ayub ◽  
Rosnah Zakaria ◽  
Muhd Zu Azhan Yahya ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Dielectric Permittivity ◽  
Natural Rubber ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Dissipation Factor ◽  
Dielectric Modulus ◽  
Aging Properties ◽  
Solution Cast ◽  
Cast Technique

Methyl-grafted natural rubber (MG30) was treated with N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD) to enhance it anti-aging properties. The treated MG30 was used as polymer electrolyte by incorporating lithium trifluoromethane sulfonate (LiTF) through solution-cast technique. The impedance behavior of the sample has been carried out by analyzing the dielectric permittivity, dissipation factor, dielectric modulus and ionic conductivity as a function of temperature at different frequencies through impedance spectroscopy. Keywords: Methyl-grafted natural rubber, polymer electrolyte, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, ionic conductivity, dielectric.

Thermal Analysis of 1-Ethyl-3-Methylimidazolium Trifluoromethanesulfonate Ionic Liquid to PEO-NaCF3SO3 Polymer Electrolyte

2017 ◽  
Vol 268 ◽  
pp. 338-342 ◽  
Author(s):  
Mohd Noor Zairi Mohd Sapri ◽  
Azizah Hanom Ahmad ◽  
Mohd Muzamir Mahat
Keyword(s):  
Ionic Liquid ◽  
Polymer Electrolyte ◽  
Transference Number ◽  
Solid Polymer ◽  
Scanning Calorimetry ◽  
As Doping ◽  
Ionic Transference Number ◽  
Sodium Trifluoromethanesulfonate ◽  
Solution Cast ◽  
Ion Conducting

The objective of this study is to investigate the effect of ionic liquid to PEO-NaCF3SO3 solid polymer electrolyte. Sodium ion conducting polymer electrolyte films consisting of Polyethylene oxide (PEO) as a polymer host, Sodium trifluoromethanesulfonate (NaCF3SO3) as doping salt and 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMiTF) as ionic liquid has been prepared by solution cast technique. Different amounts (5, 10, 15, 20, 25 and 30 wt. %) of EMiTF will be added to the optimized polymer-salt composition to develop PEO - NaCF3SO3 – EMiTF polymer electrolyte. Difference Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) indicated that the crystalline degree and the weight loss % of the electrolyte decrease with increasing the wt. % of the EMiTF respectively. The ionic transference number was found in the value of 0.95 which suggests that ions are the charge carriers.

Ionic Conductivity and Dielectric Properties of Plasticized Polyacrylonitrile Based Solid Polymer Electrolyte Films

2012 ◽  
Vol 626 ◽  
pp. 211-214
Author(s):  
W.G. Chong ◽  
Zurina Osman ◽  
Lisani Othman ◽  
Khairul Bahiyah Md. Isa
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Solid Polymer ◽  
Arrhenius Relation ◽  
Solution Cast ◽  
Host Polymer ◽  
Cast Technique

The conducting polymer electrolyte films composed of polyacrylonitrile (PAN) as the host polymer, LiCF3SO3 and NaCF3SO3 as inorganic salts and ethylene carbonate (EC) as plasticizer were prepared by the solution cast technique. The conductivities of the films were characterized by impedance spectroscopy. On addition of more than 14 wt% of salt, the NaCF3SO3-containing PAN films exhibited higher ionic conductivity than the LiCF3SO3-containing PAN films. The values of the dielectric constant, εr and dielectric loss, εi increase as frequency decreases at room temperature. The temperature dependence of the conductivity obeys Arrhenius relation in the temperature range of 303 K to 353 K.

scholarly journals Structural, Impedance, and EDLC Characteristics of Proton Conducting Chitosan-Based Polymer Blend Electrolytes with High Electrochemical Stability

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3508 ◽  
Author(s):  
Shujahadeen B. Aziz ◽  
Rebar T. Abdulwahid ◽  
Muhamad H. Hamsan ◽  
Mohamad A. Brza ◽  
Ranjdar M. Abdullah ◽  
...  
Keyword(s):  
Double Layer ◽  
Polymer Blend ◽  
Electrochemical Impedance ◽  
Linear Sweep Voltammetry ◽  
Transference Number ◽  
Electrochemical Stability ◽  
Dc Conductivity ◽  
Transference Numbers ◽  
Cyclic Voltammogram ◽  
Casting Technique

In this report, a facile solution casting technique was used to fabricate polymer blend electrolytes of chitosan (CS):poly (ethylene oxide) (PEO):NH4SCN with high electrochemical stability (2.43V). Fourier transform infrared (FTIR) spectroscopy was used to investigate the polymer electrolyte formation. For the electrochemical property analysis, cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS) techniques were carried out. Referring to the FTIR spectra, a complex formation between the added salt and CS:PEO was deduced by considering the decreasing and shifting of FTIR bands intensity in terms of functional groups. The CS:PEO:NH4SCN electrolyte was found to be electrochemically stable as the applied voltage linearly swept up to 2.43V. The cyclic voltammogram has presented a wide potential window without showing any sign of redox peaks on the electrode surface. The proved mechanisms of charge storage in these fabricated systems were found to be double layer charging. The EIS analysis showed the existence of bulk resistance, wherein the semicircle diameter decreased with increasing salt concentration. The calculated maximum DC conductivity value was observed to be 2.11 × 10−4 S/cm for CS:PEO incorporated with 40 wt% of NH4SCN salt. The charged species in CS:PEO:NH4SCN electrolytes were considered to be predominantly ionic in nature. This was verified from transference number analysis (TNM), in which ion and electron transference numbers were found to be tion = 0.954 and tel = 0.045, respectively. The results obtained for both ion transference number and DC conductivity implied the possibility of fabricating electrolytes for electrochemical double layer capacitor (EDLC) device application. The specific capacitance of the fabricated EDLC was obtained from the area under the curve of the CV plot.

Investigation of morphology and transport properties of Na+ ion conducting PMMA:PEO hybrid polymer electrolyte

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
M. Ravindar Reddy ◽  
Anna Mallikarjun ◽  
M. Jaipal Reddy ◽  
A. R. Subrahmanyam ◽  
M. Vikranth Reddy
Keyword(s):  
Polymer Electrolyte ◽  
Research Work ◽  
Dc Conductivity ◽  
Hybrid Polymer ◽  
Xrd Pattern ◽  
Sem Image ◽  
Amorphous Content ◽  
Structure Morphology ◽  
Solution Cast ◽  
Ion Conducting

Abstract The aim of this research work is to examine the modification of structure, morphology and conductivity properties of PMMA: PEO blend hybrid polymer electrolyte system complexed with NaClO4 salt. Solution-cast procedure was adopted in preparation of these films. These films were characterized with XRD, SEM, DSC, and DC conductivity for the evaluation of modified properties. Peaks have disappeared and broadened in the XRD pattern of PMMA for higher concentration of PEO polymer and salt presented films, which indicated that attaining of higher amorphous phase in these polymer electrolyte films. Almost smooth surface morphology with fewer pores was observed in 20 wt. % of PEO and NaClO4 salt present PMMA films of SEM image. This establishes a dominant presence of amorphous content in these NaClO4 complexed PMMA:PEO hybrid electrolyte films when compared to pure PMMA and PEO. Disappearance of melting temperature was observed in all concentrations of NaClO4 salt and PEO polymer added PMMA polymer films, which suggests a decrease of crystalline and an increase of amorphous nature. Enhancing of DC conductivity with temperature was observed in all the films but higher conductivity was exhibited at higher concentration of NaClO4 salt present films.

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