Impedance study of (PEO) sub(10)LiClO sub(4)-Al sub(2)O sub(3) composite polymer electrolyte with blocking electrodes

A composite solid polymer electrolyte (SPE) of (PEO) sub(10)LiClO sub(4)-Al sub(2)O sub(3) was prepared and Pt and stainless steel (SS) blocking electrodes were used for an impedance study. It was found that the semicircle in the high frequency range and the straight line in the low frequency range...

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Bibliographic Details
Published in:Electrochimica acta 2001-03, Vol.46 (12), p.1829-1836
Main Authors: Qian, Xinming, Gu, Ningyu, Cheng, Zhiliang, Yang, Xiurong, Wang, Erkang, Dong, Shaojun
Format: Article
Language:English
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Summary:A composite solid polymer electrolyte (SPE) of (PEO) sub(10)LiClO sub(4)-Al sub(2)O sub(3) was prepared and Pt and stainless steel (SS) blocking electrodes were used for an impedance study. It was found that the semicircle in the high frequency range and the straight line in the low frequency range depend upon different blocking electrodes and polarization potentials applied in the experiments. In the equivalent circuit, two constant phase elements (CPE) have been used instead of the pure geometrical and double layer capacitances, respectively. A theoretical line calculated from their estimated values has a good correlation with the experiment data. Moreover, the equivalent circuit also can be used to explain the impedance properties of Pt and stainless steel (SS) blocking electrodes both in the high and the low frequency ranges.
ISSN:0013-4686