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CONDUCTIVITY STUDIES OF (PEO +KHCO3) SOLID ELECTROLYTE SYSTEM AND ITS APPLICATION AS AN ELECTROCHEMICAL CELL

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Author(s): K. VIJAY KUMAR | G. SUNEETA SUNDARI

Journal: Journal of Engineering Science and Technology
ISSN 1823-4690

Volume: 5;
Issue: 2;
Start page: 130;
Date: 2010;
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Keywords: EComplex | Polymer electrolyte | Ionic conductivity | Transport number | Electrochemical cell

ABSTRACT
Solid polymer electrolyte system, polyethylene oxide (PEO) complexed with potassium bicarbonate (KHCO3) salt was prepared by solution-cast technique. Several experimental techniques such as infrared radiation (IR), differential scanning calorimeter (DSC), and composition dependence conductivity, temperature dependence conductivity in the temperature range of 308–368 K and transport number measurements were employed to characterize this polymer electrolyte system. The conductivity of the (PEO+KHCO3) electrolyte was found to be about 3 times larger than that of pure PEO at room temperature. The transference data indicated that the charge transport in these polymer electrolyte systems is predominantly due to K+ ions. Using this polymer electrolyte an electrochemical cell with configuration K+/(PEO+KHCO3)/(I2+C+electrolyte) was fabricated and its discharge characteristics are studied. A number of other cell parameters associated with the cell were evaluated and are reported in this paper.
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