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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, 43(9), 4157-4169
- Article Type
- Author Keywords
- 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
- FUEL-CELL DURABILITY; ADHESION FORCES; SILICA; TEMPERATURE; HUMIDITY; AFM; OPERATION; SURFACES; CONTRAST; ACID
- 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.
- Related Researcher
연료전지; Fuel Cell; 하이브리드 전원; Hybrid Power; 스택; Stack; 촉매; Catalyst; 연료전지시스템; Fuel Cell System;
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