fig4

Figure 4. (A) Linear sweep voltammetry curve; (B) lithium plating/stripping test with 500 h cycling at 0.25 mA cm^-2; (C) interfacial resistance before and after plating/stripping test; (D) morphology of Li surface before and after 500 h cycling test of the cell using PF-70(IL-EC) membrane (scale bar at 100 µm). EC: Ethylene carbonate; IL: ionic liquid; Li lithium.