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7953896 
Journal Article 
Enhanced ionic conduction observed for ordered-mesoporous alumina-ionic conductor composites 
Maekawa, H; Tanaka, R; Yamamura, T 
2003 
1 
Materials Research Society Symposium Proceedings
ISSN: 0272-9172
EISSN: 1946-4274 
MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS 
756 
75-80 
English 
WOS:000183159100010 
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. 
Tuller, H.