Maximized proton conductivity of the HPF6 clathrate hydrate by structural transformation

Jong Ho Cha; Kyuchul Shin; Sukjeong Choi; Sangyong Lee; Huen Lee

doi:10.1021/jp805510g

Maximized proton conductivity of the HPF₆ clathrate hydrate by structural transformation

Jong Ho Cha
, Kyuchul Shin
, Sukjeong Choi
, Sangyong Lee
, Huen Lee

Korea Advanced Institute of Science and Technology
Texas A&M University

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The unique and specific interaction of ionic guests with the surrounding cage framework might play a key role in promoting the electrochemical properties of ionic clathrate hydrates. In this work we focus on addressing (1) structural transformation simply due to an increase of water content, (2) structure-dependent ionic conductivity, (3) the existence of maximum ionic conductivity at a specific hydration number, and (4) proton migration through channels in the crystalline hydrate matrix. The melting temperature and ionic conductivity of hexafluorophosphoric acid hexahydrate (HPF₆·6. 0H₂O) are found to be approximately 29.5 °C and 10^-1 S•cm^-1, respectively, showing that HPF₆·6. 0H₂O possesses desirable features as a solid proton conductor.

Original language	English
Pages (from-to)	13332-13335
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	35
DOIs	https://doi.org/10.1021/jp805510g
State	Published - 4 Sep 2008

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abstract = "The unique and specific interaction of ionic guests with the surrounding cage framework might play a key role in promoting the electrochemical properties of ionic clathrate hydrates. In this work we focus on addressing (1) structural transformation simply due to an increase of water content, (2) structure-dependent ionic conductivity, (3) the existence of maximum ionic conductivity at a specific hydration number, and (4) proton migration through channels in the crystalline hydrate matrix. The melting temperature and ionic conductivity of hexafluorophosphoric acid hexahydrate (HPF6·6. 0H2O) are found to be approximately 29.5 °C and 10-1 S•cm-1, respectively, showing that HPF6·6. 0H2O possesses desirable features as a solid proton conductor.",

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AU - Cha, Jong Ho

AU - Shin, Kyuchul

AU - Choi, Sukjeong

AU - Lee, Sangyong

AU - Lee, Huen

PY - 2008/9/4

Y1 - 2008/9/4

N2 - The unique and specific interaction of ionic guests with the surrounding cage framework might play a key role in promoting the electrochemical properties of ionic clathrate hydrates. In this work we focus on addressing (1) structural transformation simply due to an increase of water content, (2) structure-dependent ionic conductivity, (3) the existence of maximum ionic conductivity at a specific hydration number, and (4) proton migration through channels in the crystalline hydrate matrix. The melting temperature and ionic conductivity of hexafluorophosphoric acid hexahydrate (HPF6·6. 0H2O) are found to be approximately 29.5 °C and 10-1 S•cm-1, respectively, showing that HPF6·6. 0H2O possesses desirable features as a solid proton conductor.

AB - The unique and specific interaction of ionic guests with the surrounding cage framework might play a key role in promoting the electrochemical properties of ionic clathrate hydrates. In this work we focus on addressing (1) structural transformation simply due to an increase of water content, (2) structure-dependent ionic conductivity, (3) the existence of maximum ionic conductivity at a specific hydration number, and (4) proton migration through channels in the crystalline hydrate matrix. The melting temperature and ionic conductivity of hexafluorophosphoric acid hexahydrate (HPF6·6. 0H2O) are found to be approximately 29.5 °C and 10-1 S•cm-1, respectively, showing that HPF6·6. 0H2O possesses desirable features as a solid proton conductor.

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ER -

Maximized proton conductivity of the HPF₆ clathrate hydrate by structural transformation

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