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Preparation of Composite Nafion/polyphenylene Oxide(PPO) with Hetropoly Acid(HPA) Membranes for Direct Methanol Fuel Cells  

Kim, Donghyun (School of Chemical and Biological Engineering, & Institute of Chemical Process, Seoul National Universty)
Sauk, Junho (School of Chemical and Biological Engineering, & Institute of Chemical Process, Seoul National Universty)
Kim, Hwayong (School of Chemical and Biological Engineering, & Institute of Chemical Process, Seoul National Universty)
Lee, Kab Soo (Environmental System Engineering, Kimpo College)
Sung, Joon Yong (Center for Clean Technology, Yonsei University)
Publication Information
Korean Chemical Engineering Research / v.44, no.2, 2006 , pp. 187-192 More about this Journal
Abstract
The preparation and characterization of new polymer composite membranes containing polyphenylene oxide (PPO) thin films with hetropoly acid (HPA) are presented. PPO thin films with phosphotungstic acid (PWA) or phosphomolybdic acid (PMA) have been prepared by using the solvent mixture. The PWA and PPO can be blended using the solvent mixture, because PPO and PWA are not soluble in the same solvent. In this study, methanol was used as a solvent dissolving PWA and chloroform was used as a solvent dissolving PPO. PPO-PWA solutions were cast onto a glass plate with uniform thickness. The composite membranes were prepared by casting Nafion mixture on porous PPO-PWA films. The morphology and structure of these PPO-PWA films were observed with scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The composite membranes were characterized by measuring their ion conductivity and methanol permeability. The performance was evaluated with composite membranes as electrolytes in fuel cell conditions. The methanol cross-over of composite membranes containing PPO-PWA barrier films in the DMFC reduced by 66％.
Keywords
Polyphenylene Oxide; Hetropoly Acid; Phosphotungstic Acid; PPO-PWA Films; Direct Methanol Fuel Cells; Methanol Cross-over;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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