Method of testing a fuel cell by infrared thermography
A fuel cell and imaging technology, applied to fuel cell parts, fuel cells, fuel cell additives, etc., can solve problems such as high cost and performance of fuel cells, constraints on commercial applicability, and testing difficulties
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test approach 100
[0051] The thermographic image of the sample(s) can be captured by an array of IR detectors, which can include an array of infrared pyrometers (i.e., two or more IR pyrometers), an infrared camera, and preferably a digital infrared camera. Figure 2 illustrates a typical experimental scheme used in the method of the present invention 100 . with an IR detector array 102 capture fuel cell 10 A thermographic map, which is interpreted with a computer 104 connection, for data collection and analysis. IR detector 102 Preferably an IR digital camera where each pixel can be mapped to a fuel cell 10 Points on the MEA surface for multiple point capture. As shown, the IR detector 102 positioned substantially perpendicular to the fuel cell 10 surface of the MEA. Although a single detector is shown 102 , but can also be designed towards fuel cell 10 Multiple detectors on the opposite surface of the MEA, as described therein. Also describes the electrical load 106 , which can b...
Embodiment 1
[0081] A test fuel cell was prepared according to FIG. 1 . Prepare the cathode side by cutting a 5 cm x 5 cm (2 in x 2 in) window in the end plate electrode and graphite barrier. The graphite barrier was additionally cut to provide protrusions on which to glue the GE214 quartz window with epoxy cement. The dual duty of current collector and flow field is provided by a fine platinum mesh (52 mesh, 0.1 mm diameter metal wire) placed between the MEA and the graphite barrier. A platinum mesh overlies the same area as the MEA and extends through the quartz window so that it makes electrical contact with the graphite barrier. The anode side was left unchanged in the conventional cell, which included aluminum end plates, gold-coated electrodes with insulating layers, graphite barrier layers with machined flow fields, and Toray paper current collectors. Flexible silicon heaters are attached to the outer surfaces of the end plates for temperature control. The MEA was fabricated from...
Embodiment 2
[0083] A test cell similar to that described in Example 1 was assembled except that MEAs were prepared with four different materials in four quadrants. The four materials are PtMnFe, PtCoFe, PtNiFe and PtHf. A FLIR SC1000 camera (FLIR Systems, Boston MA), with a field of view of roughly one square inch, was focused at the intersection of four quadrants and then spread out slightly to eliminate lines caused by the platinum screen. Once the cell temperature stabilized, the cell was heated to 76° C. with no applied voltage and a background image was recorded. Images were then recorded at constant voltages of 0.8 volts, 0.7 volts, 0.6 volts, 0.5 volts and 0.45 volts. Figure 5 shows the background-removed thermograms at these voltages.
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