Proton Conducting Properties of Layered Metal Phosphate Hydrates

Abstract:

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The proton conducting properties of layered metal phosphates hydrates (M (HPO4)2·nH2O (M = Sn, Ti, Zr), MPs) were examined under various humidities at 20−150°C. SnP showed a high conductivity of more than 10-2 S cm-1 under saturated water vapor pressure and a weak humidity dependence of its conductivity at 150°C. The hydrated water content (n) of ZrP was approximately stable at 1 in a wide humidity range of more than 20% at 150°C. The n of SnP varied more widely than that of ZrP; however, the conductivity of SnP remained high even in a low-n range. The short distance between adjacent hydrated water molecules was suggested to be the reason for the high proton conductivity of SnP.

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Periodical:

Edited by:

Keiichi Katayama, Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

267-270

DOI:

10.4028/www.scientific.net/KEM.320.267

Citation:

Y. Kawakami and M. Miyayama, "Proton Conducting Properties of Layered Metal Phosphate Hydrates ", Key Engineering Materials, Vol. 320, pp. 267-270, 2006

Online since:

September 2006

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Price:

$35.00

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