| 摘要 |
A high temperature fuel cell stack is composed of high temperature fuel cells having interconnecting conducting plates for leading off current produced in the high temperature fuel cell. At least one of the plates is formed of an alloy based on Fe with a Cr content of between 17 and 30% by weight and has an average coefficient of thermal expansion of between 13 and 14x10-6/K in a temperature range from room temperature to 900 DEG C. Two electrodes are disposed between the plates and supplied with a working medium by the plates. One of the electrodes has a thickness of at least 100 mu m and the other a thickness of about 30 mu m. An electrolyte is disposed between the two electrodes, contains stabilized ZrO2 and has a thickness of between 5 and 30 mu m. The electrodes and the electrolyte have a coefficient of thermal expansion matched to that of the at least one plate. The material costs for the plates are reduced by a factor of 10 to 20 in comparison with prior art plates. |
