Construction of PEO composite electrolyte based a hybrid from metal organic framework and sepiolite (ZIF-8@SEP) for lithium-ion batteries

Abstract Polyethylene oxide (PEO) exhibits excellent segmental flexibility and solubility for lithium salts, but its high crystallinity at room temperature results in relatively low ionic conductivity. To enhance its performance, this study incorporates highly adsorbent fibrous sepiolite (SEP) and zeolite imidazolate framework (ZIF-8) with high specific surface area and tunable pore structure. These are combined into a ZIF-8@SEP filler, aiming to synergistically reduce PEO crystallinity and esta