Nano Archive

Ionic conductivity enhancement in the (PEO)(9)LiCF3SO3+SiO2 nano-composite solid polymer electrolyte

Dissanayake , M. A. K. L and Jayathilaka, P. A. R. D. (2004) Ionic conductivity enhancement in the (PEO)(9)LiCF3SO3+SiO2 nano-composite solid polymer electrolyte. SOLID STATE IONICS: THE SCIENCE AND TECHNOLOGY OF IONS IN MOTION . pp. 437-441.

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Recent research efforts to improve the ambient temperature conductivity in polyethylene oxide (PEO) based solid polymer electrolytes have been directed towards the incorporation of ultra-fine nano-sized particles cf ceramic fillers into the polymer electrolyte. However, the mechanism of ionic conductivity enhancement in these nanocomposite polymer electrolytes is still not well understood. In this paper we report the ionic conductivity of the (PEO)(9)LiCF3SO3 + 10 wt% SiO2 system incorporating nanosized silica fillers of different specific surface areas. (PEO)(9)LiCF3SO3 + 10 wt% SiO2 films were prepared by solvent casting technique by incorporating SiO2 filler grains of three different specific surface areas: 225 m(2)/g, 338 m(2)/g and 390 M-2/g. Results show that (i) the discontinuity in the log a vs I/T plots around 50 degrees C becomes less visible for the filler concentrations that correspond to higher condictivities, (ii) the VTF behaviour extends down to ambient temperatures (iii) the conductivity of both the amorphous phase above 60 T and the partially crystalline phase below 60 T have increased substantially due to the presence of the silica filler, (iv) the observt d conductivity trend clearly shows that the conductivity enhancement increases with specific surface area of filler grains and the highest conductivity enhancement is obtained for the SiO2 particle having largest specific surface area (390 m(2)/g).

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7250
Deposited By:JNCASR
Deposited On:28 Oct 2009 05:20
Last Modified:28 Oct 2009 05:20

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