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Figure 5. Mechanism research. (A and B) SEM images of lithium deposition morphology on the copper surface of the Li||Cu battery at different deposition times at 1 mA cm^-2; (C) Single-cycle galvanostatic discharge profiles of BC/ZIF-67 and BC/ZIF-67@Li₂TiO₃ QSSEs at 10 mA cm^-2; inset shows in situ optical microscopy images of electrolyte-electrode interfaces; (D and E) BC QSSE and (F and G) BC/ZIF-67@Li₂TiO₃ QSSE lithium dendrite growth simulation; (H) Schematic diagram of the bridging effect of ZIF-67; (I) Schematic diagram of the tip-shielding effect of Li₂TiO₃. BC: Bacterial cellulose; ZIF-67: zeolitic imidazolate framework-67; QSSEs: quasi-solid-state electrolytes; SEM: scanning electron microscope.