Development of spinel forming alloys with improved electronic conductivity for MCFC applications

摘要: Abstract The molten carbonate fuel cells (MCFC), as an alternative power source, present one of the most promising and environmental cleanest processes. As a high temperature cell, problems arise due to corrosion metallic current collectors voltage drop by formation insulating products. aim this work is develop Fe–Cr stainless steels, alloyed with different amounts Mn, Co, Si, Ni, Mo, in order obtain acceptable thin scale low electrical resistivity spinel formation. layers products, containing multivalent elements like Co Mo expected give satisfactory results. In situ conductivity measurements tests have been performed presence (Li, K) melt at 650 °C under oxidizing gas atmosphere (15 vol.% CO 2 synthetic air) up 5000 h. Investigations scales on hot rolled alloys indicated solubility Mn layer, formed simulated MCFC conditions. Outward diffusion was observed after longer reaction times. An inner oxidation zone also measured connection between behaviour composition found.