Abstract
Portable electronic device industry is vastly developing over the last few years. As electrochemical batteries are suitable power sources for portable devices, demand for reliable and efficient batteries have also been increased. Since liquid electrolytes can cause several safety hazards due to leaking of the electrolyte, studies on gel polymer electrolytes have been able to attract many researchers. In this research work, a gel polymer electrolyte based primary cell was fabricated and discharge characteristics were studied. To prepare the gel polymer electrolyte, Polymethylmethacrylate (PMMA), Ethylene Carbonate (EC), Propylene Carbonate (PC) and Copper trifluoromethanesulfonate (Cu(CF 3 SO 3 ) 2 - CuTf) were used. Gel polymer electrolyte sample which contained 22.5% PMMA: 30% EC: 30% PC: 17.5% CuTf showed a conductivity of 2.34 10 -3 S cm -1 at room temperature with an appreciable mechanical stability. Primary cell with Cu and Mg electrodes showed 1.73 V open circuit potential, 131 µA h capacity and 1.13 mA short circuit current. DOI: http://dx.doi.org/10.4038/sljp.v15i0.6686 Sri Lankan Journal of Physics, Vol. 15 (2014) 45-51
Highlights
As a diverse range of portable electronic devices are being introduced to the market, requirement of reliable power sources has been increased
The structure of a gel polymer electrolyte is described as a liquid electrolyte encapsulated in polymer matrices
Gel polymer electrolyte which is containing 22.5% PMMA: 30% Ethylene Carbonate (EC): 30% Propylene Carbonate (PC): 17.5% CuTf is having a good ionic conductivity of 2.34×10-3 S cm-1 which is suitable for applications
Summary
As a diverse range of portable electronic devices are being introduced to the market, requirement of reliable power sources has been increased. Earlier liquid electrolytes were used widely for batteries but at present, gel polymer electrolytes (GPE) have received a global interest because they have many advantages such as free of internal shorting, no leakage of electrolytes and higher ionic conductivity over the liquid electrolytes[2]. Due to these characteristics, gel polymer electrolytes can be used in various electrochemical devices such as batteries, solar cells and super capacitors[3,4]. Discharge characteristics of the cells were studied under different loads
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