Mass Transport Phenmena in Thin Polyelectrolyte Films under Device Operating Conditions

2016 Fiscal Year Final Research Report

• Project/Area Number: 26410224
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Polymer/Textile materials
• Research Institution: Kyushu University
• Principal Investigator: Kawaguchi Daisuke 九州大学, 分子システムデバイス国際リーダー教育センター, 准教授 (70362267)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 界面 / 薄膜 / 高分子電解質 / 固体高分子形燃料電池 / 水 / 拡散

Outline of Final Research Achievements

Aggregation states and proton conductivity in Nafion thin films were examined by neutron reflectivity (NR) in conjunction with impedance measurements. NR indicates that multi-hydrated interfacial layers exists at the substrate interface for the Nafion films. The proton conductivity parallel to the substrate increased with decreasing film thickness. On the other hand, the proton conductivity normal to the interface decreased with decreasing film thickness. Thus, it can be claimed that the hydrated interfacial layer is a responsible factor for the anisotropic proton transport in Nafion thin films.

Free Research Field

高分子構造・物性