Manufacture of Low-Temperature SOFC by APS Coating Technology

Ni-Co-Al-Li oxide (NCAL) is an important catalyst material for low-temperature solid oxide fuel cells (LTSOFCs). In this paper, air-plasma spray (APS) coating technology was applied to make NCAL layers on porous steel supports for the LTSOFC. The results showed that NCAL was well deposited on the skeletons of the support. Due to the plasma heating, the original LiMO₂ phase transferred to Li-deficient Li_0.4M_1.6O₂ phase simultaneously forming Li-rich oxide. New fuel cell structures were designed. The stability of the fuel cells was evaluated by performing galvanostatic test at 500 °C. The influence of the cell structures and quality on the electronic property of the cells was discussed.