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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/18465

Title: Hydration and OH-/Br- Conduction Properties of Fluorene-Thiophene-Based Anion Exchange Thin Films Tethered with Different Cations
Authors: Wang, Fangfang
Nagano, Shusaku
Hara, Mitsuo
Nagao, Yuki
Keywords: Fuel cells
temperature dependence of OH- conductivity
thin film
water uptake
Issue Date: 2022-07-25
Publisher: American Chemical Society
Magazine name: ACS Applied Polymer Materials
Volume: 4
Start page: 5965
End page: 5974
DOI: 10.1021/acsapm.2c00811
Abstract: After trimethylammonium (TMA) and N-methylpiperidinium (Pip) functionalized fluorene-thiophene-based anion conductive polymers were synthesized for this work, the effect of cationic groups on hydration and conduction properties of OH-/Br- form fluorene-thiophene-based thin films were investigated. Fluorene-thiophene-based thin film carrying TMA showed superior OH- conductivity to that functionalized with Pip, above 10-2 S cm-1 at 25 °C under 95% relative humidity (RH), because it had higher ion exchange capacity (IEC), lower hydrophobicity, and smaller size of TMA. In situ temperature dependence OH- conductivity measurement process for the thin film form was established under different temperatures and 90% RH. The activation energies (Ea) of OH- conduction for thin films carrying TMA and Pip are 33.2 kJ mol-1 and 35.7 kJ mol-1. The Ea of OH- conduction was independent of the cation. This is the first systematic study of hydration and OH- conduction properties of anion exchange thin films.
Rights: Fangfang Wang, Shusaku Nagano, Mitsuo Hara, Yuki Nagao, ACS Applied Polymer Materials, 2022, 4, 5965-5974. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Polymer Materials, copyright (c) American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsapm.2c00811.
URI: http://hdl.handle.net/10119/18465
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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