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Conductivity studies of starch-based polymer electrolytes

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Abstract

A proton-conducting polymer electrolyte based on starch and ammonium nitrate (NH4NO3) has been prepared through solution casting method. Ionic conductivity for the system was conducted over a wide range of frequency between 50 Hz and 1 MHz and at temperatures between 303 K and 373 K. Impedance analysis shows that sample with 25 wt.% NH4NO3 has a smaller bulk resistance (R b) compared to that of the pure sample. The amount of NH4NO3 was found to influence the proton conduction; the highest obtainable room temperature conductivity was 2.83 × 10−5 S cm−1, while at 100 °C, the conductivity in found to be 2.09 × 10−4 S cm−1. The dielectric analysis demonstrates a non-Debye behavior. Transport parameters of the samples were calculated using the Rice and Roth model and thus shows that the increase in conductivity is due to the increase in the number of mobile ions.

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Acknowledgments

A.S.A. Khiar would like to thank the Applied Material Science Lab of the Physics Department, University of Malaya for providing the impedance spectroscopy that facilitates this work. Special thanks also are attributed to Mr. Ariffin Muda for his invaluable help in carrying out some of the experiments. This work was financed by Universiti Sains Islam Malaysia project no. PPPP(G)/2007.

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Authors and Affiliations

  1. Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800, Nilai, Negeri Sembilan, Malaysia

    A. S. Ahmad Khiar

  2. Physics Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia

    A. K. Arof

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  1. A. S. Ahmad Khiar
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Correspondence to A. S. Ahmad Khiar.

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Khiar, A.S.A., Arof, A.K. Conductivity studies of starch-based polymer electrolytes. Ionics 16, 123–129 (2010). https://doi.org/10.1007/s11581-009-0356-y

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