Ether‐Oxygen Groups Modified Carboxylic Ester Enabling High‐Voltage Lithium Metal Batteries

(NCM811) battery employing the formulated PMA-based electrolyte demonstrates stable cycling at a high cut-off voltage of 4.5 V for over 100 cycles, retaining 90.1% of its initial capacity even at 60 °C. Furthermore, a molecular interfacial model is proposed to elucidate the impact of the designed electrolyte on electrode interfacial behavior and battery performance, providing valuable insights for the development of high-performance LMB electrolytes.