سال انتشار: ۱۳۸۷

محل انتشار: دومین همایش پیل سوختی ایران

تعداد صفحات: ۲

نویسنده(ها):

Abbas Soleimani – Department of Chemistry, Faculty of Materials, Malek Ashtar University of Technology, Lavizan, Tehran, Iran
Ali Reza Zarei –

چکیده:

The polymer electrolyte membrane fuel cells(PEM and DMFC) are the most promising power sources for stationary and transportation application in the future due to many attractive features. These features include high efficiency, high power density, relative low operating temperature, conventional fuel supply and long life time. In order to make the PEM and DMFC fuel cells more economically feasible, processing and material costs need to be reduced. In a fuel cell stack, the electrically conductive plates are often referred to as bipolar plates because one face contacts
the cathode electrode while the opposite face contacts the anode electrode. Each bipolar plate therefore conducts electrical current from anode of one cell to the cathode of the adjacent cell in the stack. Bipolar Plate is a vital component of PEM and DMFC fuel cells, which supplies fuel and oxidant to reactive sites, removes reaction products, collects produced current and provides mechanical support for the cells in the stack. Bipolar Plates constitute more than 60% of the weight and 30% of the total cost in a fuel cell stack.one approach to reduce the cost of fuel cells bipolar plates is to use of polymeric nanocomposite bipolar plate instead of graphite or metallic bipolar plates that exhibits adequate conductivity (about 20 mohm.cm2 which is well within an acceptable level (i, e. not greater than about 100 to 200 mohm.cm2)), corrosion resistant, low manufacturing costs and good mechanical strength. In this work we use polypropylene thermoplastic (resin base) and Multiwall carbon nanotube and graphite (additive) for preparation of polymeric nanocomposite that have good electrical conductivity (>10 s/cm), high mechanical Strength and low cost. The impact of different types of fillers on the composite blend properties was evaluated, as well as the synergetic and electrical conductivity effect of mixtures of filler types and concentrations within a thermoplastic polymer matrix. Research results show that Nanocomposite with loading up to 15% Multiwall carbon nanotube and 45% graphite exhibit better performance.