scholarly journals Development of Polymer Blend Electrolyte Membranes Based on Chitosan: Dextran with High Ion Transport Properties for EDLC Application

2019 ◽  
Vol 20 (13) ◽  
pp. 3369 ◽  
Author(s):  
Shujahadeen B. Aziz ◽  
Muhamad H. Hamsan ◽  
Mohd F. Z. Kadir ◽  
Wrya O. Karim ◽  
Ranjdar M. Abdullah
Keyword(s):  
Ion Transport ◽  
Polymer Blend ◽  
Lithium Perchlorate ◽  
Linear Sweep Voltammetry ◽  
Solid Polymer ◽  
Transference Numbers ◽  
Equivalent Series Resistance ◽  
Electrolyte Membranes ◽  
Ion Conducting ◽  
Polymer Blend Electrolyte

Solid polymer blend electrolyte membranes (SPBEM) composed of chitosan and dextran with the incorporation of various amounts of lithium perchlorate (LiClO4) were synthesized. The complexation of the polymer blend electrolytes with the salt was examined using FTIR spectroscopy and X-ray diffraction (XRD). The morphology of the SPBEs was also investigated using field emission scanning electron microscopy (FESEM). The ion transport behavior of the membrane films was measured using impedance spectroscopy. The membrane with highest LiClO4 content was found to exhibit the highest conductivity of 5.16 × 10−3 S/cm. Ionic (ti) and electronic (te) transference numbers for the highest conducting electrolyte were found to be 0.98 and 0.02, respectively. Electrochemical stability was estimated from linear sweep voltammetry and found to be up to ~2.3V for the Li+ ion conducting electrolyte. The only existence of electrical double charging at the surface of electrodes was evidenced from the absence of peaks in cyclic voltammetry (CV) plot. The discharge slope was observed to be almost linear, confirming the capacitive behavior of the EDLC. The performance of synthesized EDLC was studied using CV and charge–discharge techniques. The highest specific capacitance was achieved to be 8.7 F·g−1 at 20th cycle. The efficiency (η) was observed to be at 92.8% and remained constant at 92.0% up to 100 cycles. The EDLC was considered to have a reasonable electrode-electrolyte contact, in which η exceeds 90.0%. It was determined that equivalent series resistance (Resr) is quite low and varies from 150 to 180 Ω over the 100 cycles. Energy density (Ed) was found to be 1.21 Wh·kg−1 at the 1st cycle and then remained stable at 0.86 Wh·kg−1 up to 100 cycles. The interesting observation is that the value of Pd increases back to 685 W·kg−1 up to 80 cycles.

scholarly journals Synthesis of Porous Proton Ion Conducting Solid Polymer Blend Electrolytes Based on PVA: CS Polymers: Structural, Morphological and Electrochemical Properties

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4890 ◽  
Author(s):  
Muaffaq M. Nofal ◽  
Shujahadeen B. Aziz ◽  
Jihad M. Hadi ◽  
Rebar T. Abdulwahid ◽  
Elham M. A. Dannoun ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Blend ◽  
Salt Content ◽  
Linear Sweep Voltammetry ◽  
Solid Polymer ◽  
Transference Numbers ◽  
Poly Vinyl Alcohol ◽  
Casting Technique ◽  
Peak Broadening ◽  
Ion Conducting

In this study, porous cationic hydrogen (H+) conducting polymer blend electrolytes with an amorphous structure were prepared using a casting technique. Poly(vinyl alcohol) (PVA), chitosan (CS), and NH4SCN were used as raw materials. The peak broadening and drop in intensity of the X-ray diffraction (XRD) pattern of the electrolyte systems established the growth of the amorphous phase. The porous structure is associated with the amorphous nature, which was visualized through the field-emission scanning electron microscope (FESEM) images. The enhancement of DC ionic conductivity with increasing salt content was observed up to 40 wt.% of the added salt. The dielectric and electric modulus results were helpful in understanding the ionic conductivity behavior. The transfer number measurement (TNM) technique was used to determine the ion (tion) and electron (telec) transference numbers. The high electrochemical stability up to 2.25 V was recorded using the linear sweep voltammetry (LSV) technique.

scholarly journals Lithium ion conducting solid polymer blend electrolyte based on bio-degradable polymers

2013 ◽  
Vol 36 (2) ◽  
pp. 333-339 ◽  
Author(s):  
NATARAJAN RAJESWARI ◽  
SUBRAMANIAN SELVASEKARAPANDIAN ◽  
MONI PRABU ◽  
SHUNMUGAVEL KARTHIKEYAN ◽  
C SANJEEVIRAJA
Keyword(s):  
Polymer Blend ◽  
Lithium Ion ◽  
Solid Polymer ◽  
Degradable Polymers ◽  
Ion Conducting ◽  
Polymer Blend Electrolyte

scholarly journals The Study of Plasticized Solid Polymer Blend Electrolytes Based on Natural Polymers and Their Application for Energy Storage EDLC Devices

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2531 ◽  
Author(s):  
Elham M.A. Dannoun ◽  
Shujahadeen B. Aziz ◽  
Mohamad A. Brza ◽  
Muaffaq M. Nofal ◽  
Ahmad S.F.M. Asnawi ◽  
...  
Keyword(s):  
Polymer Blend ◽  
Linear Sweep Voltammetry ◽  
Transference Number ◽  
Xrd Analysis ◽  
Solid Polymer ◽  
Natural Polymers ◽  
Nickel Metal ◽  
Crystallinity Degree ◽  
Ionic Transference Number ◽  
Ion Conducting

In this work, plasticized magnesium ion-conducting polymer blend electrolytes based on chitosan:methylcellulose (CS:MC) were prepared using a solution cast technique. Magnesium acetate [Mg(CH3COO)2] was used as a source of the ions. Nickel metal-complex [Ni(II)-complex)] was employed to expand the amorphous phase. For the ions dissociation enhancement, glycerol plasticizer was also engaged. Incorporating 42 wt% of the glycerol into the electrolyte system has been shown to improve the conductivity to 1.02 × 10−4 S cm−1. X-ray diffraction (XRD) analysis showed that the electrolyte with the highest conductivity has a minimum crystallinity degree. The ionic transference number was estimated to be more than the electronic transference number. It is concluded that in CS:MC:Mg(CH3COO)2:Ni(II)-complex:glycerol, ions are the primary charge carriers. Results from linear sweep voltammetry (LSV) showed electrochemical stability to be 2.48 V. An electric double-layer capacitor (EDLC) based on activated carbon electrode and a prepared solid polymer electrolyte was constructed. The EDLC cell was then analyzed by cyclic voltammetry (CV) and galvanostatic charge–discharge methods. The CV test disclosed rectangular shapes with slight distortion, and there was no appearance of any redox currents on both anodic and cathodic parts, signifying a typical behavior of EDLC. The EDLC cell indicated a good cyclability of about (95%) for throughout of 200 cycles with a specific capacitance of 47.4 F/g.

scholarly journals The Study of EDLC Device with High Electrochemical Performance Fabricated from Proton Ion Conducting PVA-Based Polymer Composite Electrolytes Plasticized with Glycerol

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1896 ◽  
Author(s):  
Mohamad A. Brza ◽  
Shujahadeen B. Aziz ◽  
Hazleen Anuar ◽  
Elham M. A. Dannoun ◽  
Fathilah Ali ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Ammonium Thiocyanate ◽  
Linear Sweep Voltammetry ◽  
Film Structure ◽  
Transference Numbers ◽  
Poly Vinyl Alcohol ◽  
Equivalent Series Resistance ◽  
Composite Electrolytes ◽  
Solution Cast ◽  
Ion Conducting

In the present work, a novel polymer composite electrolytes (PCEs) based on poly(vinyl alcohol) (PVA): ammonium thiocyanate (NH4SCN): Cd(II)-complex plasticized with glycerol (Gly) are prepared by solution cast technique. The film structure was examined by XRD and FTIR routes. The utmost ambient temperature DC ionic conductivity (σDC) of 2.01 × 10−3 S cm−1 is achieved. The film morphology was studied by field emission scanning electron microscopy (FESEM). The trend of σDC is further confirmed with investigation of dielectric properties. Transference numbers of ions (tion) and electrons (tel) are specified to be 0.96 and 0.04, respectively. Linear sweep voltammetry (LSV) displayed that the PCE potential window is 2.1 V. The desired mixture of activated carbon (AC) and carbon black was used to fabricate the electrodes of the EDLC. Cyclic voltammetry (CV) was carried out by sandwiching the PCEs between two carbon-based electrodes, and it revealed an almost rectangular shape. The EDLC exhibited specific capacitance, energy density, and equivalent series resistance with average of 160.07F/g, 18.01Wh/kg, and 51.05Ω, respectively, within 450 cycles. The EDLC demonstrated the initial power density as 4.065 × 103 W/Kg.

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

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.

Silicone‐containing polymer blend electrolyte membranes for fuel cell applications

2020 ◽  
pp. 50328
Author(s):  
Byungchan Hwang ◽  
Shoichi Kondo ◽  
Takamasa Kikuchi ◽  
Kazunari Sasaki ◽  
Akari Hayashi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Blend ◽  
Electrolyte Membranes ◽  
Polymer Blend Electrolyte
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