Connecting material for solid oxide fuel cell, manufacturing method thereof, and solid oxide fuel cell comprising same
A solid oxide, fuel cell technology, used in fuel cell parts, fuel cells, chemical instruments and methods, etc., can solve the problems of high coating cost and difficult selection of coating conditions, and achieve the effect of maintaining electrical conductivity
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[0114] According to an exemplary embodiment of the present specification, the connection material for a solid oxide fuel cell connects a plurality of unit cells in series.
[0115] According to an exemplary embodiment of the present specification, the connection material of the m-th unit cell among the plurality of unit cells connects the m-th air electrode and the (m+1)-th fuel electrode in series. m is an integer of 1 or more.
[0116] Hereinafter, the present invention will be described in more detail through examples. These examples are provided only to describe the present invention more specifically, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited to these examples.
preparation Embodiment 1 to preparation Embodiment 8
[0119] A mixed solution in a sol liquid state was prepared by dissolving the starting materials in Table 1 below in D.I water to which ethylene glycol and citric acid were added according to the weight ratio of each material. In this case, the weight ratio of citric acid to starting material was 2:1. In this case, D.I water was evaporated by heating the mixed solution, and a mixed solution in a gel state was formed by a sol-gel process at 70°C. After the solution is dried, a calcined powder is prepared by raising the temperature at a temperature raising rate of 3°C / min to 5°C / min and keeping the resultant product in an air atmosphere of 1,000°C for 3 hours or more. The final powder is prepared by mixing calcined powder together with zirconia balls.
preparation Embodiment 9
[0121] Starting materials were prepared as shown in Table 1, and these materials were introduced into a container formed of polyethylene (PE) material, and then mixed with zirconia balls using D.I water as a solvent. After that, the resulting solution was dried at 100°C, then the temperature was raised from 25°C at a rate of 3°C / min to 5°C / min, and calcined by keeping the temperature at 1,000°C for 3 hours or more The powders were mixed to prepare a conductive oxide powder. That is, in Preparation Example 9, the powder had the same composition as in Preparation Example 1, but was prepared by the solid-phase synthesis method in the related art.
[0122] [Table 1]
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