Impact of the Solid Interface on Proton Conductivity in Nafion Thin Films

Yudai Ogata, Tatsuki Abe, Shigeki Yonemori, Norifumi L. Yamada, Daisuke Kawaguchi, Keiji Tanaka

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

Proton conductivity of polyelectrolytes in the interfacial region with a solid is key to the performance of polyelectrolyte-based fuel cells. The proton conductivity of Nafion thin films was examined as a function of the thickness along both directions, normal and parallel to the interface. Neutron reflectivity measurements revealed that a water-containing multilamellar structure was formed at the substrate interface. The presence of the interfacial layer, or the two-dimensional proton-conductive pathway, suppressed and enhanced the out-of-plane and in-plane proton conductivities, respectively. The method of proton conductivity in the interfacial region differed from that in the bulk, namely, the Grotthuss mechanism. Using laminated films, we conclude by showing that the proton conductivity in the Nafion thin film changes on the basis of the interface-to-volume ratio. This knowledge will be helpful for the design of devices containing polyelectrolytes with solid materials.

元の言語英語
ページ(範囲)15483-15489
ページ数7
ジャーナルLangmuir
34
発行部数50
DOI
出版物ステータス出版済み - 12 18 2018

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Proton conductivity
Thin films
conductivity
Polyelectrolytes
protons
thin films
Protons
Fuel cells
Neutrons
fuel cells
perfluorosulfonic acid
Water
reflectance
neutrons
Substrates
water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

これを引用

Impact of the Solid Interface on Proton Conductivity in Nafion Thin Films. / Ogata, Yudai; Abe, Tatsuki; Yonemori, Shigeki; Yamada, Norifumi L.; Kawaguchi, Daisuke; Tanaka, Keiji.

:: Langmuir, 巻 34, 番号 50, 18.12.2018, p. 15483-15489.

研究成果: ジャーナルへの寄稿記事

Ogata, Yudai ; Abe, Tatsuki ; Yonemori, Shigeki ; Yamada, Norifumi L. ; Kawaguchi, Daisuke ; Tanaka, Keiji. / Impact of the Solid Interface on Proton Conductivity in Nafion Thin Films. :: Langmuir. 2018 ; 巻 34, 番号 50. pp. 15483-15489.
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