Peng, B., Huang, X., Xu, C., Huang, Z., Zhu, R., Jin, C., Wang, L., Zhou, H. (2026). Grain Welding Strategy Suppressing Chemomechanical Failure in Polycrystalline Cathode for High‐Voltage Fast‐Charging Sodium‐Ion Batteries. Advanced Materials. https://doi.org/10.1002/adma.202514943