Solid State Science and Technology, Vol. 16, No 1 (2008) 1-7

ISSN 0128-7389

Corresponding Author: azizhanom@salam.uitm.edu.my

1

CONDUCTIVITY AND FTIR STUDIES ON PVA/CHITOSAN-LiCF3SO3

N.A.A. Razak, T. Winie, F.S.A. Ghani and A.H. Ahmad

Institute of Sciences, Faculty of Applied Sciences, University Teknologi MARA,

40450 Shah Alam, Selangor, Malaysia

ABSTRACT

New polymer electrolytes using Chitosan and Poly(vinyl alcohol)[PVA] with different weight percent (wt%) have been prepared using solution cast technique. The low conductivity of this system (S/cm) was enhanced due to the dissociation of lithium trifluoromethanesulfonate (LiCF3SO3) added to the blend. The ac conductivity of the polymer electrolytes has been investigated by using impedance spectroscopy method in the frequency range of 100 kHz to 5 MHz at room temperature. Result for conductivity studies has shown that the sample with 45% lithium trifluoromethanesulfonate exhibits the highest conductivity of 1.241 x 10-4 S/cm at room temperature. The enhanced conductivity observed was due to complexation occurred between the Li+ cation and the lone pair electron of the nitrogen (N) and oxygen (O) atoms present in the polymer blend. Infrared spectroscopy was employed to confirm the polymer-salt complexation.

 

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