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http://dx.doi.org/10.3938/NPSM.68.1173

Surface Charge and Morphological Characterization of Mesoporous Cellular Foam Silica/Nafion Composite Membrane by Using EFM  

Kwon, Osung (Tabula Rasa College, Keimyung University)
Publication Information
New Physics: Sae Mulli / v.68, no.11, 2018 , pp. 1173-1182 More about this Journal
Abstract
Mesoporous silica allows proper hydration of an ion exchange membrane under low relative humidity due to its strong hydrophilicity and structural characteristic. A mesoporous silica and Nafion composite membrane shows good proton conductivity under low relative humidity. An understanding of ion-channel formation and proton transfer through an ion-channel network in mesoporous silica and Nafion composite membranes is essential for the development and the optimization of ion exchange membranes. In this study, a mesoporous cellular foam $SiO_2/Nafion$ composite membrane is fabricated, and its proton conductivity and performance are measured. Also, the ion-channel distribution is analyzed by using electrostatic force microscopy to measure the surface charge density of the mesoporous cellular foam $SiO_2/Nafion$ composite membrane. The research reveals a few remarkable results. First, the composite membrane shows excellent proton conductivity and performance under low relative humidity. Second, the composite membrane is observed to form ion-channel-rich and ion-channel-poor region locally.
Keywords
$SiO_2/Nafion$ composite membrane; Mesoporous cellular foam $SiO_2$; Electrostatic force microscopy; PEM fuel cell;
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