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Which risk increases when designing a high temperature solid oxide fuel cell (SOFC) stack?

A)Electrolyte grain boundary resistivity rises
B)Anodic carbon deposition significantly accelerates
C)Nernst potential shifts towards zero
D)Electrode-electrolyte delamination becomes dominant

💡 Explanation

Electrode-electrolyte delamination emerges due to differential thermal expansion. The mismatch generates stress because creep rate constants rise exponentially with temperature and therefore interface bonds weaken, rather than other electrical losses or deposition issues becoming limiting.

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