No abstract

In-situ sintering of the Ni-10 wt % Cr MCFC anode is attempted by adding an appropriate amount of Sn, one of those elements with a melting point lower than the operating temperature of an MCFC. The tape-cast green sheet is sintered for 100 h under the same condition as for an MCFC anode in operation and then characterized to determine whether or not it fulfilled the requirements for an MCFC anode. The porosity, pore size distribution, creep resistance and sinter resistance of the anode are judged to be adequate for an MCFC.

Bipolar plate and current collector are important stainless steel components of MCFC because they supply the pathway of the electron flow between each unit cell. However these stainless steel components are prone to corrosion in the hot corrosion environment and corrosion products forming on the surface increase the ohmic resistance. To solve these problems, alloy elements are added to modify the properties of the oxide layer on the surface. High Cr content causes the formation of thin oxide layer, therefore, improves the corrosion resistance. Mn enrichment occurs in the oxide layer and may lead to an increase in electrical conductivity.