Entropy‐Driven Polymer Electrolyte with Liquid Single‐Atoms for Fast‐Charging Solid‐State Sodium Batteries

at 10 C, and the capacity retention of 91.76% after 1000 cycles at 10 C. Cell has the capability of 5-minute fast-charging with 19.8 µm thickness for the full-capacity at 10 C. Ah-level engineering application cells have the retention of 93.69% after 600 cycles at 1 C. Electrolytes incorporating liquid single-atoms offer new strategies for fast charging.