Nowadays, the global energy transition is driven by efforts to cut greenhouse gas emissions and adopt sustainable sources. In this context, hydrogen has emerged as a key energy vector, providing a viable solution for energy storage and helping to mitigate the intermittent nature of renewable sources. Among its production methods, water electrolysis stands out as a carbon-free process, while high-temperature ceramic-based electrolysers and fuel cells offer high efficiency, making them a promising technology for sustainable energy systems. Among these high-temperature electrochemical devices, Solid Oxide Cells (SOCs) and Protonic Ceramic Cells (PCCs) are particularly promising. While SOCs represent the most mature technology, their high operating temperatures (700–1000°C) accelerate degradation, limiting long-term performance.