FESTSTOFFBRENNSTOFFZELLE

摘要

The present invention provides a composite material suitable for use as the supporting member for a fuel cell, the composite material comprising (100-A) % by mole of MgO and A % by mole of MgAl2O4 (wherein A is 14 to 64) and having a coefficient of thermal expansion close to that of a electrolyte YSZ, which is used as a solid electrolyte in the fuel cell, and a high thermal conductivity. By using the above supporting member, no cracking occurs in the electrolyte at high temperature during the use thereof and further during the preparation thereof, so that no lowering in the electromotive force occurs.