Dynamic Microinterfacial Polymerization Enables Scalable Synthesis of Two‐Dimensional Polymer Sheets for Quasi‐Solid‐State Electrolytes in Sodium‐Metal Batteries

at 20 C), and high-capacity retention (92% after 1000 cycles at 1 C). This work establishes a new, scalable approach for synthesizing 2D organic sheets with promising applications in energy-related areas.