Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Enhanced hydroxide ion conductivity of Mg–Al layered double hydroxide at low humidity by intercalating dodecyl sulfate anion
Daiju KUBOKohei IGARASHISho ISHIYAMANataly Carolina ROSERO NAVARROAkira MIURAMikio HIGUCHIKiyoharu TADANAGA
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2019 Volume 127 Issue 11 Pages 788-792

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Abstract

Ionic conductivity of dodecyl sulfate (DS) anion [CH3(CH2)11OSO3]-intercalated Mg–Al layered double hydroxide (LDH) was examined. Mg–Al DS LDH showed higher ionic conductivity under low humidity than Mg–Al CO32− LDH, the most typical LDH. The conductivity of Mg–Al DS LDH was 7.6 × 10−4 S cm−1 at 80°C 30%RH, whereas that of Mg–Al CO32− LDH was 1.1 × 10−4 S cm−1. This higher ionic conductivity is attributed to the increased amount of the adsorbed water with intercalation of DS anion. The increase of surface water probably provides a path for hydroxide ion conduction, which results in the higher ionic conductivity under low humidity. Additionally, Mg–Al DS LDH retained high ionic conductivity for a longer storage under low humidity.

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© 2019 The Ceramic Society of Japan
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