Planar stacks of the solid oxide fuel cell (SOFC) made from CrFe5-interconnector were tested at typical operation conditions (850°C, 300 Ma/cm~2, H_2/Air). The cell voltage decreased during 5000 h up to 20% from their initial value. The used materials and their interfaces were analyzed after different times of the stack operation to find the origin of the degradation. The following effects were recognized: 1. Glass penetration in the air channels 2. Glass crystallization 3. Small damaging of the cathode surface at the air inlet 4. Change in the microstructure of the cathode during operation 5. Deformation of the anode by Ni-mesh 6. Sintering of Ni in the anode 7. Reaction between protective layer and interconnector with CrO_x-formation 8. Oxidation of the Ni-mesh/interconnector contacts in H_2/H_2O (1:1) atmosphere. The correlations to the stack degradation are discussed.
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机译：在典型的工作条件（850°C，300 Ma / cm〜2，H_2 /空气）下测试了由CrFe5互连器制成的固体氧化物燃料电池（SOFC）的平面堆栈。电池电压在5000 h内从初始值下降了20％。在堆叠操作的不同时间后，对用过的材料及其界面进行分析，以找出降解的根源。认识到以下效果：1.玻璃在空气通道中的渗透2.玻璃的结晶3.进气口处的阴极表面的小损伤4.操作过程中阴极的微观结构发生变化5.镍-造成阳极变形筛网6.阳极中Ni的烧结7.保护层与互连器之间的反应具有CrO_x的形成8. Ni筛网/互连器触点在H_2 / H_2O（1：1）气氛中的氧化。讨论了与堆栈退化的相关性。
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