CONDUCTIVITY STUDIES OF BIOPOLYMER ELECTROLYTE BASED ON POTATO STARCH/CHITOSAN BLEND DOPED WITH LICF3SO3

2015 ◽  
Vol 75 (7) ◽  
Author(s):  
Shanti Navaratnam ◽  
Azlin Sanusi ◽  
A. H. Ahmad ◽  
S. Ramesh ◽  
K. Ramesh ◽  
...  
Keyword(s):  
Potato Starch ◽  
Cost Effective ◽  
Casting Method ◽  
Biopolymer Electrolytes ◽  
Electrolyte Film ◽  
Solution Casting Method ◽  
Electrochemical Devices ◽  
Biopolymer Electrolyte ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer

Biopolymer electrolytes are currently attracting a great deal of attention as substitute for synthetic polymers in electrochemical devices, as they are cost effective and eco-friendly. In this research, the biopolymer potato starch/chitosan blend polymer electrolyte film doped with LiCF3SO3 was prepared by solution casting method. Sample with 35wt. % LiCF3SO3 showed the highest ionic conductivity at room temperature. The dielectric studies reveal the non-Debye nature of the electrolyte. The Rice and Roth model was used quantitatively to explain the conductivity trends of the prepared electrolyte systems. The complexation of salt with the polymer host was studied using Fourier transform infrared (FTIR) spectroscopy.

Proton Conducting Biopolymer Electrolytes Based on Starch Incorporated with Ammonium Thiocyanate

2015 ◽  
Vol 1112 ◽  
pp. 275-278 ◽  
Author(s):  
Fatin Nabella Zulkefli ◽  
S. Navaratnam ◽  
Azizah Hanom Ahmad
Keyword(s):  
Ionic Conductivity ◽  
Room Temperature ◽  
Corn Starch ◽  
Ammonium Thiocyanate ◽  
Casting Method ◽  
Arrhenius Model ◽  
Proton Conducting ◽  
Biopolymer Electrolytes ◽  
Solution Casting Method ◽  
Biopolymer Electrolyte

In the present study, proton conducting biopolymer electrolyte systems based on corn starch and NH4SCN salt were prepared using solution casting method. The sample with 30 wt.% NH4SCN exhibited the highest ionic conductivity of 5.54 x 10-3S cm-1at room temperature. Temperature-dependence ionic conductivity relationship obeys Arrhenius model and minimum activation energy of 0.28 eV was obtained for the highest conducting composition.

The Effect of Ammonium Bromide on Methylcellulose Biopolymer Electrolytes for Electrical Studies

2021 ◽  
Vol 317 ◽  
pp. 426-433
Author(s):  
Siti Nurhaziqah Abd Majid ◽  
Afiqah Qayyum Ishak ◽  
Nik Aziz Nik Ali ◽  
Muhamad Zalani Daud ◽  
Hasiah Salleh
Keyword(s):  
Fourier Transform ◽  
Ammonium Bromide ◽  
Solution Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Electrical Studies ◽  
Biopolymer Electrolytes ◽  
Salt Complex ◽  
Solution Casting Method

The development of biopolymer electrolytes based on methylcellulose (MC) has been accomplished by incorporating ammonium bromide (NB) to the polymer-salt system. The biopolymer electrolytes were prepared via solution-casting method. The conductivity and permittivity characteristics of the material were studied. The biopolymer-salt complex formation have been analysed through Fourier Transform Infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The conductivity of the sample was measured by EIS HIOKI. Upon addition of 20 wt.% of NB, highest conductivity of 3.25×10-4 μScm-1 was achieved at ambient temperature. The temperature dependence of the biopolymer electrolytes exhibit Arrhenius behaviour. This result had been further proven in FTIR study.

scholarly journals THERMAL AND ELECTROCHEMICAL PROPERTIES OF SOLID BIOPOLYMER ELECTROLYTES FROM STARCH OF DIFFERENT BOTANICAL ORIGIN

2021 ◽  
Vol 18 (38) ◽  
pp. 137-148
Author(s):  
Alvaro ARRIETA
Keyword(s):  
Thermal Decomposition ◽  
Corn Starch ◽  
Potato Starch ◽  
Cassava Starch ◽  
Redox Potentials ◽  
Botanical Origin ◽  
Scanning Calorimetry ◽  
Biopolymer Electrolytes ◽  
Starch Films ◽  
Biopolymer Electrolyte

Background: Solid biopolymer electrolytes are a type of material with high technological potential used in the development of solar cells, batteries, fuel cells, among others, due to their biodegradable nature and low environmental impact. Aim: This study aimed to evaluate the effect of the botanical origin of the starch used to prepare solid biopolymeric electrolyte films on its electrochemical and thermal properties and to establish the variations in thermal decomposition temperatures and redox potentials depending on the botanical origin of the starch used. Methods: Films of solid biopolymer electrolyte were made by thermochemical synthesis processes using corn starch, cassava starch, potato starch, glycerol, polyethylene glycol, and glutaraldehyde as plasticizers and lithium perchlorate salt. The synthesis solutions were taken to an oven at 70 °C for 48 hours. The films were characterized electrochemically by cyclic voltammetry using a dry electrochemical cell and thermally by differential scanning calorimetry and thermogravimetric analysis. Results and Discussion: The results showed that the electrochemical behavior of the films was similar in terms of registered redox processes. However, the potential values of the oxidation and reduction were different, as are the stability and intensity of the processes. On the other hand, the thermal analysis allowed establishing two decomposition processes in each of the films studied; the first process was due to dehydration and depolymerization phenomena in the films. The temperatures recorded were 59.0 °C, 58.9 °C, and 89.9 °C for potato starch, cassava starch, and corn starch films. The second process evidenced the thermal decomposition at different temperatures, 267.7 °C in potato starch films, 280.6 °C in corn starch films, and 287.1 °C in cassava starch films. Conclusions: It could be concluded that the botanical origin of the starch used in the synthesis of solid biopolymer electrolyte films affects its behavior and electrochemical and thermal stability.

Preparation and characterization of blend polymer electrolyte film based on poly(vinyl alcohol)-poly(acrylonitrile)/MgCl2 for energy storage devices

Ionics ◽  
2017 ◽  
Vol 24 (4) ◽  
pp. 1083-1095 ◽  
Author(s):  
R. Manjuladevi ◽  
M. Thamilselvan ◽  
S. Selvasekarapandian ◽  
P. Christopher Selvin ◽  
R. Mangalam ◽  
...  
Keyword(s):  
Energy Storage ◽  
Poly Vinyl Alcohol ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrolyte Film ◽  
Polymer Electrolyte Film ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer ◽  
Poly Acrylonitrile

Ionic Conductivity and Dielectric Properties of CMC Doped NH4SCN Solid Biopolymer Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 230-235 ◽  
Author(s):  
N.A.M. Noor ◽  
M.I.N. Isa
Keyword(s):  
Dielectric Properties ◽  
Ionic Conductivity ◽  
Electrical Impedance ◽  
Ammonium Thiocyanate ◽  
Electrical Impedance Spectroscopy ◽  
Dielectric Studies ◽  
Arrhenius Law ◽  
Casting Method ◽  
Biopolymer Electrolytes ◽  
Solution Casting Method

In this work, solid biopolymer electrolytes (SBE) containing carboxymethyl cellulose (CMC) doped with ammonium thiocyanate (NH4SCN) were prepared via solution casting method. The ionic conductivity and dielectric properties of CMC-NH4SCN system were investigated by electrical impedance spectroscopy in the temperature range of 303-353 K. The dc conductivity shows that the highest ionic conductivity of 6.48 x 10-5 Scm-1 at ambient temperature was obtained when 25 wt.% of NH4SCN was incorporated. The temperature dependence of ionic conductivity revealed that CMC-NH4SCN system was discovered to obey Arrhenius law where the regression value is almost unity (R2≈1). Activation energy of CMC-NH4SCN system was found to decrease with the increment of NH4SCN concentration. The dielectric behaviour of the CMC-NH4SCN system have been analyzed using dielectric permittivity (ε*) and electrical modulus (M*) spectra. Results from dielectric studies showed a non-Debye behaviour of CMC-NH4SCN system.

Conductivity and Transport Properties Study of Plasticized Carboxymethyl Cellulose (CMC) Based Solid Biopolymer Electrolytes (SBE)

2013 ◽  
Vol 856 ◽  
pp. 118-122 ◽  
Author(s):  
A.S. Samsudin ◽  
M.I.N. Isa
Keyword(s):  
Ionic Conductivity ◽  
Carboxymethyl Cellulose ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Casting Method ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Biopolymer Electrolytes ◽  
Arrhenius Relation ◽  
Solution Casting Method

Solid biopolymer electrolytes (SBE) comprising carboxymethyl cellulose (CMC) with NH4Br-EC were prepared by solution casting method. The samples were characterized by impedance spectroscopy (EIS) and sample containing 25wt. % of NH4Br exhibited the highest room temperature conductivity of 1.12 x 10-4S/cm for salted CMC based SBE system. The ionic conductivity increased to 3.31 x 10-3S/cm when 8 wt. % of ethylene carbonate (EC) was added to the highest conductivity. The conductivity-temperature of plasticized SBE system obeys the Arrhenius relation where the ionic conductivity increases with temperature. The influence of EC addition on unplasticized CMC based SBE was found to be dependent on the number and the mobility of the ions. This results revealed that the influence of plasticizer (EC) which was confirmed play the significant role in enhancement of ionic conductivity for SBE system.

Effect of Intermolecular Interaction on Ionic Conductivity of CMC-DTAB Plasticized with Ec Based Solid Biopolymer Electrolyte

2021 ◽  
Vol 1025 ◽  
pp. 26-31
Author(s):  
Nurhasniza Mamajan Khan ◽  
Noor Saadiah Mohd Ali ◽  
Ahmad Salihin Samsudin
Keyword(s):  
Ionic Conductivity ◽  
Intermolecular Interaction ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Ammonium Bromide ◽  
Ftir Analysis ◽  
Biopolymer Electrolytes ◽  
Electrochemical Devices ◽  
Biopolymer Electrolyte ◽  
Conduction Properties

The present work highlights on the structural and conduction properties of the solid biopolymer electrolytes (SBPE) based carboxymethyl cellulose (CMC) doped dodecyltrimethyl ammonium bromide (DTAB) and plasticized with ethylene carbonate (EC). The SBPE exhibits high ionic conductivity at room temperature where the highest value reaching 1.0 x 10-3 S cm-1 for sample containing with 10 wt. % of EC and increases the ionic conductivity when temperature was increased. Complexation within the SBPE has been confirmed by the FTIR analysis where the intermolecular interaction has improvised the coordination between CMC-DTAB and EC resulting in better structural and conductivity ability. The findings suggest that the great potential of CMC and make it promising to serve as an electrolyte for electrochemical devices.

Effects of LiCF3SO3 on PVDF-HFP/MG49 (70/30) Based Blend Polymer Electrolyte

2013 ◽  
Vol 313-314 ◽  
pp. 117-120 ◽  
Author(s):  
Narges Ataollahi ◽  
Azizan Ahmad ◽  
Harun Haji Hamzah ◽  
Mohd Yusri Rahman ◽  
Nor Sabirin Mohamed
Keyword(s):  
Polymer Electrolyte ◽  
Vinylidene Fluoride ◽  
Solid Polymer ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Poly Vinylidene Fluoride ◽  
Solution Casting Method ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer ◽  
The Degree Of Crystallinity

Poly (vinylidene fluoride-hexafluoro propylene) (PVDF-HFP), Poly (methyl methacrylate)-grafted natural rubber (MG49) (70/30) complexed with different compositions of lithium trifluoromethane sulfonate (LiCF3SO3) based solid polymer electrolyte has been prepared using solution casting method. This work has demonstrated that conductivity values were found to depend upon the concentration of LiCF3SO3. The highest ionic conductivity was 1.97×10ˉ4 S cm-1at 25 wt. % of LiCF3SO3 at room temperature. X-ray diffraction (XRD) indicates decrease in the degree of crystallinity by increasing of salt concentration.

scholarly journals Electrical Properties of PVA:PVP:PEG based Blend Polymer Electrolytes

2019 ◽  
Vol 9 (2S2) ◽  
pp. 291-294
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Dielectric Strength ◽  
Xrd Analysis ◽  
Solution Casting ◽  
Casting Method ◽  
Novel Approach ◽  
Amorphous Nature ◽  
Solution Casting Method ◽  
Blend Polymer

This is a novel approach to get polyblend films with improved properties such as ionic conductivity and dielectric strength. Different ratios of PEG (5%, 10%, 15%, 20%, 25%, 30%) are added with optimized PVA: PVP ratio. PVA: PVP: PEG based BPEs are prepared by using solution casting method. The polymer PEG act as a plasticizer and chemically stable in air.The prepared electrolytes are characterized by XRD, FTIR and ionic conductivity studies. The XRD analysis shows amorphous nature of the polyblend electrolytes. Dielectric analysis is carried out for the BPEs. The higher conductivity is obtained for 20% PEG added polyblend electrolytes and it is 9.0x10-9 S/Cm. Thus, PVA: PVP: PEG (40:40:20) system is confirmed as optimized one for further studies to enhance the ionic conductivity

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