| Abstract Scope |
Solid oxide cells (SOCs) exhibit distinct degradation behaviors depending on whether they operate in fuel cell or electrolysis mode. Among the critical degradation phenomena is chemo-mechanical failure, such as electrode delamination, which results from the development of high chemical potentials within the electrolyte. Similar degradation mechanisms have also been observed in other electrochemical systems, notably all-solid-state batteries (ASSBs). In particular, both reversible SOCs and ASSBs share degradation pathways related to the distribution of chemical potential across electrode/electrolyte interfaces. Accordingly, understanding the degradation mechanisms of rechargeable lithium-ion batteries can serve as an effective strategy to mitigate SOC degradation—and vice versa. In this study, we investigated the mechanism of electrode delamination in SOCs under various operating conditions and identified a key factor associated with chemo-mechanical failure. The findings offer valuable insights into the chemo-mechanical degradation of SOCs by elucidating parallels with failure mechanisms observed in ASSBs. |
