Enhancement of ionic conductivity of PEO based polymer electrolyte by the addition of nanosize ceramic powders
- Publication Type:
- Journal Article
- Journal of Nanoscience and Nanotechnology, 2005, 5 (7), pp. 1135 - 1140
- Issue Date:
The ionic conductivity of polyethylene oxide (PEO) based solid polymer electrolytes (SPEs) has been improved by the addition of nanosize ceramic powders (TiO 2 and Al 2O 3). The PEO based solid polymer electrolytes were prepared by the solution-casting method. Electrochemical measurement shows that the 10 wt% TiO 2 PEO-LiClO 4 polymer electrolyte has the best ionic conductivity (about 10 -4 S cm -1 at 40-60°C). The lithium transference number of the 10 wt% TiO 2 PEO-LiClO 4 polymer electrolyte was measured to be 0.47, which is much higher than that of bare PEO polymer electrolyte. Ac impedance testing shows that the interface resistance of ceramic-added PEO polymer electrolyte is stable. Linear sweep voltammetry measurement shows that the PEO polymer electrolytes are electrochemically stable in the voltage range of 2.0-5.0 V versus a Li/Li + reference electrode. Copyright © 2005 American Scientific Publishers All rights reserved.
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