Spherulite-packed polymer electrolytes with high ion selectivity for stable lithium–sulfur battery performance

Abstract

We reported a spherulite-packed polymer electrolyte prepared by modulating the phase separation kinetics with TEGDME and the in situ polymerization of AMPSLi. This structure established a synergistic physical–electrostatic barrier against polysulfides. Consequently, lithium–sulfur batteries retain a capacity of 705 mAh g⁻¹ after 300 cycles at 1C, demonstrating enhanced long-term stability.