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High Efficiency Electrolyte Lithium Battery and RF Characterization

Authors: Wei Quan, Liu Chao, Mohammed N. Afsar

Abstract:

The dielectric properties and ionic conductivity of novel "ceramic state" polymer electrolytes for high capacity lithium battery are characterized by Radio frequency and Microwave methods in two broad frequency ranges from 50 Hz to 20 KHz and 4 GHz to 40 GHz. This innovative solid polymer electrolyte which is highly ionic conductive (10-3 S/cm at room temperature) from -40oC to +150oC can be used in any battery application. Such polymer exhibits properties more like a ceramic rather than polymer. The various applied measurement methods produced accurate dielectric results for comprehensive analysis of electrochemical properties and ion transportation mechanism of this newly invented polymer electrolyte. Two techniques and instruments employing air gap measurement by Capacitance Bridge and in-waveguide measurement by vector network analyzer are applied to measure the complex dielectric spectra. The complex dielectric spectra are used to determine the complex alternating current electrical conductivity and thus the ionic conductivity.

Keywords: Polymer electrolyte, dielectric permittivity, lithium battery, ionic relaxation, microwave measurement.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1099428

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References:


[1] J. R. MacCallum and C. A. Vincent, Polymer electrolyte reviews vol. 2: Springer, 1989.
[2] T. Springer, T. Zawodzinski, M. Wilson, and S. Gottesfeld, "Characterization of polymer electrolyte fuel cells using AC impedance spectroscopy," Journal of The Electrochemical Society, vol. 143, pp. 587-599, 1996.
[3] J. R. Macdonald, "Impedance spectroscopy and its use in analyzing the steady-state AC response of solid and liquid electrolytes," Journal of electroanalytical chemistry and interfacial electrochemistry, vol. 223, pp. 25-50, 1987.
[4] J. T. S. Irvine, D. C. Sinclair, and A. R. West, "Electroceramics: characterization by impedance spectroscopy," Advanced Materials, vol. 2, pp. 132-138, 1990.
[5] X. Qian, N. Gu, Z. Cheng, X. Yang, E. Wang, and S. Dong, "Impedance study of (PEO)10LiClO4–Al2O3 composite polymer electrolyte with blocking electrodes," Electrochimica acta, vol. 46, pp. 1829-1836, 2001.
[6] L. Nyikos and T. Pajkossy, "Fractal dimension and fractional power frequency-dependent impedance of blocking electrodes," Electrochimica acta, vol. 30, pp. 1533-1540, 1985.
[7] R. Armstrong and R. Burnham, "The effect of roughness on the impedance of the interface between a solid electrolyte and a blocking electrode," Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, vol. 72, pp. 257-266, 1976.
[8] A. Sharma and M. N. Afsar, "Accurate permittivity and permeability measurement of composite broadband absorbers at microwave frequencies," in Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE, 2011, pp. 1-6.
[9] A. Sharma and M. N. Afsar, "Microwave complex permeability and permittivity of nanoferrites," Journal of Applied Physics, vol. 109, pp. 07A503-07A503-3, 2011.