Song, Y., Song, Y., Wang, Y., Xu, M., Zeng, J., Liang, M., Huang, H., Zhou, W., Ran, R., Shao, Z. (2025). Cation‐Selective Defects Engineering in A‐Site Ordered Layered Perovskites for High‐Performance Reversible Protonic Ceramic Cells. Advanced Materials. https://doi.org/10.1002/adma.202511519