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Water Transport during Ion Conduction in Anion-Exchange and Cation-Exchange Membranes

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Title: Water Transport during Ion Conduction in Anion-Exchange and Cation-Exchange Membranes
Authors: Yamanaka, Toshiro Browse this author
Takeguchi, Tatsuya Browse this author
Takahashi, Hiroki Browse this author
Ueda, Wataru Browse this author
Keywords: electrolytes
ion exchange
ionic conductivity
membranes
water
Issue Date: 14-May-2009
Publisher: The Electrochemical Society
Journal Title: Journal of the Electrochemical Society
Volume: 156
Issue: 7
Start Page: B831
End Page: B835
Publisher DOI: 10.1149/1.3129618
Abstract: Water transport during ion conduction through an anion-exchange membrane (AEM) immersed in an aqueous solution of HNO3 and KOH was investigated. We have developed an apparatus to accurately measure small changes in volumes of the aqueous solution at each side of the membrane by capillary tubes during the passage of an electronic current through the membrane. In contrast to the previously reported apparatus, the present apparatus can be applied to an AEM in various aqueous solutions of electrolytes, and measurements under conditions close to those in actual solid alkaline fuel cells are therefore possible by using alkaline solutions. The water-transport number for AEM in HNO3 was larger than that in KOH, indicating the importance of selecting the appropriate aqueous solution of electrolytes. It is possible to determine whether anions or cations are conductors in electrolyte membranes with unknown properties. © 2009 The Electrochemical Society.
Rights: © The Electrochemical Society, Inc. 2009. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc., 156(7), B831-B835 (2009).
Type: article
URI: http://hdl.handle.net/2115/38860
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山中 俊朗

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