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Study of morphological characteristics on hydrophilicity-enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy
- Study of morphological characteristics on hydrophilicity-enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy
- Son, Byungrak; Oh, Kwangjin; Park, Sam; Lee, Taegwan; Lee, Dong-Ha; Kwon, Osung
- DGIST Authors
- Son, Byungrak; Lee, Dong-Ha
- Issue Date
- International Journal of Energy Research
- Article Type
- Author Keyword
- air-breathing proton exchange membrane fuel cells (AB-PEMFCs); composite membranes; dynamic mode atomic force microscopy (DMAFM); electrostatic force microscopy; liquid and solid interface analysis; proton exchange membrane; water clustering
- Atomic force microscopy; Composite membranes; Costs; Electric force microscopy; Electrostatic force; Fuel cells; Gas fuel purification; Membranes; Mesoporous materials; Metallic compounds; Metals; Phase interfaces; Silica; Water absorption; Air breathing; Dynamic modes; Electrostatic force microscopy; Proton exchange membranes; Solid interfaces; Proton exchange membrane fuel cells (PEMFC)
- 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.
- John Wiley & Sons Inc.
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