Polyrotaxane‐Assembled Semi‐Interpenetrating Polymer Electrolytes Enabling High‐Voltage Lithium Metal Batteries

cathode, the SSNE, and Li foil delivers 81.4% capacity retention after 200 cycles and rate capability up to 2C. Moreover, a 1.2 Ah pouch-format cell operates reliably for 190 cycles at room temperature with a cutoff voltage of 4.5 V. This study integrates dynamic polyrotaxane chemistry with a semi-interpenetrating polymer electrolyte architecture, offering a molecule-to-system strategy for the development of next-generation high-voltage lithium metal batteries.