Lewis Acid and Hydroxyl Enabled PEO Electrolytes for Solid-State Lithium Metal Batteries

• • Ionic conductivity of 8.3 × 10-4 S cm-1 at 60 ℃ exceeds conventional PEO-LiTFSI electrolytes by roughly an order of magnitude, directly enabling higher current densities and faster charging in solid-state cells. • • Li+ transference number of 0.57 (vs. ~0.2 for pristine PEO) reduces concentration polarization, mitigating lithium dendrite nucleation and extending cycle life under practical areal capacities. • • Electrochemical stability window of 5.2 V supports high-voltage cathodes (e.g., NMC622, NMC811) without oxidative decomposition, broadening the accessible energy density beyond 4 V-class systems. • • Li||Li symmetric cells sustain over 1200 h at 0.1 mA cm-2, and LFP||Li full cells retain 80% capacity after 400 cycles at 0.5 C, demonstrating industrial-grade cycling durability for stationary and EV applications.