The article discusses the development of metal-supported reversible protonic ceramic cells, specifically the innovative use of pure nickel as the metal support to address diffusion and reaction challenges associated with conventional materials like stainless steel. The research team from Huazhong University of Science and Technology proposed an interfacial engineering strategy using a transition layer to mitigate thermal expansion mismatch, thereby enhancing cell stability and overall performance. The fabricated cell demonstrated improved power and current densities in both fuel cell and electrolysis modes. Structural analyses confirmed enhanced stability and durability, with minimal performance degradation even after multiple cycles and cold-start tests. While the cell showed limitations at lower temperatures due to air electrode catalytic activity, future research will focus on optimizing air electrode materials for better performance. Financial support for this research was provided by various Chinese programs and foundations.