Green electrolytes based on dextran-chitosan blend and the effect of NH4SCN as proton provider on the electrical response studies

Dextran-chitosan blend added with ammonium thiocyanate (NH 4 SCN)-based solid polymer electrolytes are prepared by solution cast method. The interaction between the components of the electrolyte is verified by Fourier transform infrared (FTIR) analysis. The blend of 40 wt% dextran-60 wt% chitosan is...

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Bibliographic Details
Published in:Ionics 2018-08, Vol.24 (8), p.2379-2398
Main Authors: Kadir, M. F. Z., Hamsan, M. H.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chitosan
Condensed Matter Physics
Degree of crystallinity
Electrical resistivity
Electrochemistry
Electrolytes
Energy Storage
Field emission microscopy
Fourier transforms
Glass transition temperature
Infrared analysis
Molten salt electrolytes
Optical and Electronic Materials
Original Paper
Polymer blends
Polymers
Renewable and Green Energy
Scanning electron microscopy
Solid electrolytes
Temperature dependence
Thermal conductivity
Thiocyanates
X-ray diffraction
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Summary:Dextran-chitosan blend added with ammonium thiocyanate (NH 4 SCN)-based solid polymer electrolytes are prepared by solution cast method. The interaction between the components of the electrolyte is verified by Fourier transform infrared (FTIR) analysis. The blend of 40 wt% dextran-60 wt% chitosan is found to be the most amorphous ratio. The room temperature conductivity of undoped 40 wt% dextran-60 wt% chitosan blend film is identified to be (3.84 ± 0.97) × 10 −10  S cm −1 . The inclusion of 40 wt.% NH 4 SCN to the polymer blend has optimized the room temperature conductivity up (1.28 ± 0.43) × 10 −4  S cm −1 . Result from X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis shows that the electrolyte with the highest conductivity value has the lowest degree of crystallinity ( χ c ) and the glass transition temperature ( T g ), respectively. Temperature-dependence of conductivity follows Arrhenius theory. From transport analysis, the conductivity is noticed to be influenced by the mobility ( μ ) and number density ( n ) of ions. Conductivity trend is further verified by field emission scanning electron microscopy (FESEM) and dielectric results.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-017-2380-7