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Enhanced Ionic Conduction Observed for Ordered-Mesoporous Alumina-Ionic Conductor Composites

Published online by Cambridge University Press:  11 February 2011

Hideki Maekawa ,
Ryo Tanaka  and
Tsutomu Yamamura
Hideki Maekawa
Affiliation:
Tohoku Univ, Dept of Metallurgy, Sendai, Japan PRESTO, Japan Science and Technology Corporation, Japan.
Ryo Tanaka
Affiliation:
Tohoku Univ, Dept of Metallurgy, Sendai, Japan
Tsutomu Yamamura
Affiliation:
Tohoku Univ, Dept of Metallurgy, Sendai, Japan
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Abstract

Ordered-mesoporous Al2O3 was synthesized by the sol-gel method using neutral surfactants as templates. The pore size can be controlled over the range of 2.8∼12.5 nm by using different surfactant copolymers and by different synthetic conditions. By utilizing cyclohexane as a co-solvent, mesoporous Al2O3 having relatively mono-dispersed particle size was obtained. Composites composed of the synthesized mesoporous Al2O3 and the lithium ion conductor (LiI) was prepared. The dc electrical conductivity of 50LiI ·50(mesoporous Al2O3) was 2.6×10-4 S cm-1 at room temperature, which is more than 100 times higher than that of pure LiI. The pore size dependence of the conductivity of LiI-mesoporous Al2O3 composite was examined. A systematic dependence of conductivity upon pore size was observed, in which the conductivity increased with decreasing the pore size.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE6.18
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCES

1. Liang, C.C., J. Electrochem. Soc. 120, 1289 (1973).Google Scholar
2. Pack, S., Owens, B., and Wagner, J.B. Jr, J. Electrochem. Soc. 127, 2177 (1980).Google Scholar
3. Maier, J., Prog. Solid St. Chem. 23, 171 (1995).Google Scholar
4. Tuller, H. L., Solid State Ionics 131 143 (2000).Google Scholar
5. Maier, J., Solid State Ionics 23, 59 (1987).Google Scholar
6. Bagshaw, S.A., and Pinnavaia, T.J., Angew. Chem. Int. Ed. 35, 1102(1996).Google Scholar
7. Zhang, W.Z., and Pinnavaia, T.J., Chem. Comm. 1185 (1998).Google Scholar
8. Vaudry, F., Khodabandeh, S., and Davis, M.E., Chem. Mater. 8, 1451 (1996).Google Scholar
9. Barret, E.P., Joyner, L.G., and Halenda, P.P., J. Am. Chem. Soc. 73, 373 (1987).Google Scholar