Residual stress distribution in solid oxide fuel cells: anode‑electrolyte and anode‑electrolyte‑cathode systems

摘要

Thermal residual stresses are analyzed in SOFC components, especially in conditions when electrolyte and cathode layers are attached to other system components at different temperatures. The residual stress calculations were shown to agree with experimental data. Upon successively joining layers at different temperatures, the anode-electrolyte system has a noticeable curvature when attaching the cathode. Microcracking in individual elements of the fuel cell can be predicted through evaluation of residual stresses in anode-electrolyte (half-cell) and anode-electrolyte-cathode (full cell) systems.