Polymer Crust Electrolyte Based On Starch-Chitosan Blend Mixed With KI by Gelation Method

JASEM Front Page
Abstract:
The usage of biopolymer materials in the polymer crust electrolyte system helps to abolish environmental crisis, which will unswervingly carry towards green nation with good ionic conductivity. Biodegradable polymer crust electrolyte based on starch chitosan blends mixed with potassium iodide has been developed through gelation method. This work has the details of conductivity, dielectric, dielectric loss tangent, and modulus measurements. The decrease in diameter of the semicircle in Nyquist plots proved the increase in conductivity of polymer crust. Impedance analysis shows that the entire sample has gel like conductivity. The room temperature conductivity of electrolyte of 4.6544 x 10-4 was enhanced to 1.5405 x 10-2 S/cm on addition of 6 weight percentages of potassium iodide, affirming the increase in the number of charge carriers. The value of dielectric constant was low in higher frequency side and high at low frequency side. The height of the hump decreased from the addition of 1 to 6 weight percentages of KI. The long range motion of mobile charge carrier and conduction in material are indicated by the peak shift towards high frequency end. The long tail obtained in the modulus plot depicts the crust as an ionic conductor.

Keywords: Gel polymer electrolyte, Starch-chitosan blend, Potassium iodide, Conductivity, Conduction mechanism

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