Laminar Composite Solid Electrolyte with Poly(Ethylene Oxide)?Threaded Metal?Organic Framework Nanosheets for High?Performance All?Solid?State Lithium Battery

Developing laminar composite solid electrolyte with ultrathin thickness and continuous conduction channels in vertical direction holds great promise for all-solid-state lithium batteries. Herein, a thin, is synthesized by filtrating –NH2 functionalized metal-organic framework nanosheets then being threaded poly(ethylene oxide) chains induced the hydrogen-bonding interaction from groups. It demonstrated that lock adjacent nanosheets, giving highly enhanced structural stability (Young’s modulus, 1.3 GPa) to 7.5-?m-thick electrolyte. Importantly, these stretching structure serve as pathways along pores. makes non-conduction conductive: 3.97 × 10?5 S cm?1 at 25 °C, which even over times higher than of pure The assembled cell, thus, acquires superior cycling stability, initial discharge capacity (148 mAh g?1 0.5 C 60 °C), retention (94% after 150 cycles). Besides, pore size nanosheet tailored (24.5–40.9 Å) evaluate mechanisms chain conformation ion transport confined space. shows only proper could facilitate chains, meanwhile inhibit their disorder degree. Specifically, 33.8 Å optimized confinement effect trans-poly(ethylene cis-poly(ethylene conformation, offers significance conduction. Our design oxide)-threaded architecture provides platform paves way rational next-generation high-performance porous electrolytes.