کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
639475 1456199 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physical and electrochemical properties of Nafion/polypyrrole composite membrane for DMFC
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Physical and electrochemical properties of Nafion/polypyrrole composite membrane for DMFC
چکیده انگلیسی

Nafion/polypyrrole composite membrane was prepared by chemical in situ polymerization for a direct methanol fuel cell. The composite membrane was characterized by quantitative analysis, DMA, TGA, EPMA, water and methanol uptake tests, conductivity and permeability measurements, and unit cell operation.The mechanical and thermal properties of the composite membrane were enhanced due to the interaction between the polar phase of Nafion and secondary ammonium groups of polypyrrole. In addition, the sorption properties of the composite membrane influenced two transport properties, proton conductivity and methanol crossover. The optimization of cell performance was related to the distribution of polypyrrole particles over the cross section of the membrane. In particular when the polypyrrole particles were mainly present near the surface rather than in the internal space, the difference in the relative proton conductivity and the relative methanol permeability was largest. It is supposed that the existence of the polypyrrole particles near the surface such as thin film was favorable to reducing methanol crossover with maintaining proton conductivity. As a result of that, N/P 003 had higher performance than Nafion under the specific condition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 272, Issues 1–2, 15 March 2006, Pages 28–36
نویسندگان
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