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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/18096

Title: OH^- Conductive Properties and Water Uptake of Anion Exchange Thin Films
Authors: Wang, Fangfang
Wang, Dongjin
Nagao, Yuki
Keywords: OH^- conductivity
Water uptake
Thin film
Issue Date: 2021-04-29
Publisher: Wiley-VCH
Magazine name: Chemsuschem
Volume: 14
Number: 13
Start page: 2694
End page: 2697
DOI: 10.1002/cssc.202100711
Abstract: Several investigations have indicated that proton conduction and hydration properties of acidic ionomers differ from those of membranes. However, relations between the OH^- conductivity and water uptake in thin film forms of anion exchange membranes have not been reported yet. For this study, new in situ measurements were established to elucidate the OH^- conductivity and water uptake without allowing any influence of CO_2 from the air. Poly[(9,9-bis(6′-(N,N,N-trimethylammonium)-hexyl)-9H-fluorene)-alt-(1,4-benzene)], denoted as PFB^+, was synthesized as a model ionomer. The highest OH^- conductivity of 273-nm-thick PFB^+ film is 5.3 × 10^-2 S cm^-1 at 25°C under 95% relative humidity (RH), which is comparable to the reported OH^- conductivity of PFB^+ membrane. Reduced OH^- conductivity was found in the thinner film at 95% RH. The decreased OH^- conductivity is explainable by the reduced number of water molecules contained in the thinner film. The OH^- conductivity was reduced only slightly under the same water uptake.
Rights: This is the peer reviewed version of the following article: Copyright (C) 2021 Wiley-VCH. Fangfang Wang, Dongjin Wang, Yuki Nagao, Chemsuschem, 14(13), 2021, pp.2694-2697, which has been published in final form at https://doi.org/10.1002/cssc.202100711. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
URI: http://hdl.handle.net/10119/18096
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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