The key to solid oxide fuel applications

Part Name Material Power Spray Distance Powder Feed Ion Gas (slpm) Travel Speed ​​Anode Electrolyte Cathode. Experimental results and discussion, structural analysis The temperature in the central region of the plasma jet can be as high as nearly 20,000. After the powder enters the plasma jet, it is heated to a molten or semi-molten state, and then under the action of the plasma jet, it impacts the substrate or the formed coating at high speed. Surface, mechanical or metallurgical bonding occurs. At such high temperatures, whether the ablation or denaturation of the components occurs is a key factor affecting whether plasma spraying can be used in the manufacture of solid oxide fuel cell membranes. For this purpose, the Dmax III-C X-ray diffractometer was used to analyze the composition and phase structure of the cathode and anode materials before and after spraying. The results were compared between the cathode original powder and the sprayed film by XRD, and the diffraction peaks of the powder before and after spraying were found. The intensity angle and position did not change, and both were monoclinic before and after spraying. This shows that the experiment using the process conditions shown in Table 1 will not cause the change of the chemical composition of the electrode, so the plasma spraying method is suitable for manufacturing the SOFC electrode film. As can be seen from Fig. 3, in addition to Ni and NiO, there is Fe present in the anode after spraying. This may be related to the plasma spraying process to produce anodes. The Fe element in the matrix 45 steel diffuses into the anode.

Composite electrode microstructure analysis Electrolytes, as the heart of SOFCs, primarily act to transport ions between the anode and cathode and separate the fuel from the oxidant. To prevent helium, the electrolyte must be dense. The anode and the cathode respectively serve as sites for fuel oxidation and oxidant reduction, and must have a certain porosity in order to facilitate the transport of fuel and oxidant to the three-phase reaction zone and increase the output power of the solid oxide fuel cell.