UiO-66-NH2@67 Core–Shell Metal–Organic Framework as Fillers in Solid Composite Electrolytes for High-Performance All-Solid-State Lithium Metal Batteries

Benefiting from employing solid composite electrolytes (SCEs), all-solid-state lithium-ion batteries (ASSLBs) are recognized to occupy with high energy density and safety. Herein, a polymer-based SCE membrane (SCE-66@67) with core–shell structured metal–organic frameworks (MOFs) (UiO-66-NH 2 @67) as the fillers is presented. The SCE has combined the advantages of the two kinds of MOFs and shows a satisfying ionic conductivity (2.09 × 10 −4 S cm −1 at 60 °C) and a wide electrochemical stability window of ≈5.0 V. The full cell (Li/SCE-66@67/LiFePO 4 ) also maintains a high capacity of 120.9 mAh g −1 at 3 C. This research might help to promote the development of future SCEs for ASSLBs.