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Effects of various LiPF6 salt concentrations on PEO-based solid polymer electrolytes

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Abstract

In this research, various weight percents of LiPF6 are incorporated into PEO-based polymer electrolyte system. Thin film electrolytes are prepared via solution casting technique and characterized by FTIR, XRD and DSC analyses in order to study their complex behaviour. The amorphicity of the electrolytes are measured by DC impedance. The results reveal that the conductivity increases with increasing temperature when the salt concentration increases to 20 wt.%. The conductivity for 20 wt.% of salt remains similar to the conductivity of 15 wt.% of salt at 318 K. Impedance studies show that the conductivity increases with increasing LiPF6 concentration, whereas XRD studies reveal that the phase changes from crystalline to amorphous when LiPF6 concentration increases. DSC studies indicate a decrease in T m with increasing LiPF6 concentration. Finally, the complexation process is examined using FTIR.

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Acknowledgements

This work was financially supported by the PPP fund (PS083/2009B) provided by University of Malaya and Science fund (Grant no. 13-02-03-3068) provided by the Ministry of Science, Technology and Environment (MOSTE), Malaysia. We warmly acknowledge Mr. Ismail, Mr. Yap, Mr. Din and Ms. Lina from the Department of Physics, University of Malaya for their assistance during FTIR testing and Mr. Zailan, Mr. Riduan and Dr. Hafiz for their assistance during XRD testing at University Kebangsaan Malaysia. The authors specially thank Ms. Nadia for her constructive comments on the manuscript.

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  1. Advanced Materials Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Suriani Ibrahim, Mariah Mohd Yassin, Roslina Ahmad & Mohd Rafie Johan

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  1. Suriani Ibrahim
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  2. Mariah Mohd Yassin
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  3. Roslina Ahmad
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  4. Mohd Rafie Johan
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Correspondence to Suriani Ibrahim.

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Ibrahim, S., Yassin, M.M., Ahmad, R. et al. Effects of various LiPF6 salt concentrations on PEO-based solid polymer electrolytes. Ionics 17, 399–405 (2011). https://doi.org/10.1007/s11581-011-0524-8

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  • DOI: https://doi.org/10.1007/s11581-011-0524-8

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