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Study of morphological characteristics on hydrophilicity-enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy

Title
Study of morphological characteristics on hydrophilicity-enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy
Authors
Son, ByungrakOh, KwangjinPark, SamLee, TaegwanLee, Dong-HaKwon, Osung
DGIST Authors
Son, Byungrak; Lee, Dong-Ha
Issue Date
2019-07
Citation
International Journal of Energy Research, 43(9), 4157-4169
Type
Article
Article Type
Article
Author Keywords
air-breathing proton exchange membrane fuel cells (AB-PEMFCs)composite membranesdynamic mode atomic force microscopy (DMAFM)electrostatic force microscopyliquid and solid interface analysisproton exchange membranewater clustering
Keywords
FUEL-CELL DURABILITYADHESION FORCESSILICATEMPERATUREHUMIDITYAFMOPERATIONSURFACESCONTRASTACID
ISSN
0363-907X
Abstract
Air-breathing proton exchange membrane fuel cells (AB-PEMFCs) have a great potential for commercialization owing to their simple mechanical configuration and low cost compared with traditional proton exchange membrane fuel cells (PEMFCs). However, AB-PEMFCs perform worse than traditional PEMFCs owing to the omission of the humidifier and a poor air supply system. In this study, hygroscopic metal oxide materials with good water absorption characteristics were employed in a Nafion membrane without humidification to compensate for the lack of performance owing to low proton conductivity. Among the various metal oxide materials, mesoporous structured silica has been synthesized with Nafion to increase the water content in nonhumidified conditions. The local morphological variation and surface charge distribution on the pristine Nafion and SiO 2 /Nafion composite membranes were analyzed by using multimode atomic force microscopy and force distance analyses. Several remarkable results were revealed, including considerable morphological changes and a locally separated water cluster network structure. © 2019 John Wiley & Sons, Ltd.
URI
http://hdl.handle.net/20.500.11750/10049
DOI
10.1002/er.4528
Publisher
John Wiley & Sons Inc.
Related Researcher
  • Author Son, Byungrak  
  • Research Interests 연료전지; Fuel Cell; 하이브리드 전원; Hybrid Power; 스택; Stack; 촉매; Catalyst; 연료전지시스템; Fuel Cell System;
Files:
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Collection:
Division of Energy Technology1. Journal Articles
Division of Intelligent Robotics1. Journal Articles


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