Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722662 | International Journal of Hydrogen Energy | 2013 | 9 Pages |
Abstract
The Nafion/polytetrafluoroethylene (Nafion/PTFE) composite membrane is fabricated by a solution-spray process. The performance and morphology of the composite membrane are studied in terms of the mechanical properties, conductivity, and permeability. The results of TEM and X-ray studies show that the morphologies of crystalline and ion cluster of the perfluorosulfonated acid (PFSA) in composite membrane are apparently similar to that of Nafion® NR211 membrane. The composite membrane has higher stiffness and strength and lower swelling than that of Nafion® NR211. The conductivity at 85 °C of 0.375 S cmâ1 is relatively high in comparison to that of 0.300 S cmâ1 for Nafion® NR211. The 20 kW stack with the composite membranes is evaluated. The mean single cell voltage is 0.67 V @1000 mA cmâ2. The stack has behaved performance uniformity and steadily operated under low humidifying condition. In consideration of the integration of complex structure and perfect morphology, the solution-spray process is feasible for composite proton exchange membrane manufacture.
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Authors
Danmin Xing, Gaohong He, Zhongjun Hou, Pingwen Ming, Shufan Song,