Synergistic Gradient Interphase Engineering for Ultra‐Stable and High‐Rate Quasi‐Solid‐State Sodium Metal Batteries
Quasi‐solid‐state sodium metal batteries (QSSMBs) have emerged as a pivotal technology for safe, high‐energy‐density, and large‐scale energy storage. However, the practical application of QSSMBs is severely hindered by the formation of an unstable and high‐impedance solid electrolyte interphase (SEI) that fails to...