Fuel cell and fuel cell system
A fuel cell and current collector technology, applied in the direction of fuel cells, fuel cell groups, fuel cell components, etc., can solve the problems of small catalysts and difficult performance of fuel cell systems, and achieve high power generation efficiency
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example 1
[0103] In this example, using the Figures 4A to 4C The oxygen supply layer shown in . The water-absorbing layer is placed on the oxygen-supplying layer, such as Figures 5A to 5E shown. With this configuration, even if the water-absorbing layer does not protrude from the battery, the area exposing the end of the water-absorbing layer to the atmosphere can be increased. Thereby, evaporability can be improved.
[0104] The width of the oxygen supply layer in a sectional view of the fuel cell taken along the surface perpendicular to the plane including the opening portion and parallel to the proton conduction direction is the same as the width of the membrane electrode assembly in the sectional view. exist Figure 4A In , the portion of the oxygen supply layer precursor layer where the cut-off portion γ was located before the cut-off is part of the sealing portion on the periphery of the battery.
[0105] A method of manufacturing the fuel cell according to this example wil...
example 2
[0129] In this example, using the Figures 8A to 8C The oxygen supply layer shown in . The water-absorbing layer is placed on the oxygen-supplying layer, such as Figures 9A to 9D shown. Example 2 is similar to Example 1, except that the Figure 8A and 9A The water-absorbing layer and the oxygen-supplying layer shown in .
[0130] That is, Example 2 is an example of a fuel cell using an oxygen supply layer obtained by cutting the end of the oxygen supply layer precursor layer at a width smaller than the beam width of the support so that The end portion penetrates the oxygen supply layer in a proton conduction direction and in a direction perpendicular to the proton conduction direction. For example, the oxygen supply layer can be obtained by cutting off the end of the oxygen supply layer precursor layer exceeding 0.65 mm which is half the beam width of the support.
[0131] In this configuration, the water-absorbing layer exposes the water-absorbing layer to the atmosphe...
example 3
[0133] In this example, using the Figures 6A to 6C The oxygen supply layer shown in . The water-absorbing layer is placed on the oxygen-supplying layer, such as Figures 7A to 7D shown. This configuration makes it possible to increase the area of said end of the water-absorbing layer exposed to the atmosphere, even without protruding the water-absorbing layer from the battery. Thereby, evaporability can be improved.
[0134] Example 3 is similar to Example 1, the difference is the use of Figure 6A and 7AThe water-absorbing layer and the oxygen-supplying layer shown in . For example, the depth width may be 1.3 mm, like the beam width of the support, and the depth may be 1.5 mm. Since the thickness of the oxygen supply layer was 2 mm, the beam portion of the support was pressed through the 0.5 mm thick oxygen supply layer.
[0135] In the fuel cell configured as described above, the entire beam portion can be pressurized even when the beam portion does not have suffic...
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Abstract
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