fig4

Figure 4. (A) UV-vis absorption spectra of the supernatant of Li₂S₆ solution with 3D Ti₃C₂T_x and 3D N-Ti₃C₂T_x and the inset is a digital photograph. XPS pattern: (B) N 1s and (C) S 2p of 3D N-Ti₃C₂T_x after adsorption of Li₂S₆. The CV curves of symmetric cells with electrolytes containing Li₂S₆, (D) scan rate: 0.2 mV s^-1 and (E) scan rate: 10 to 50 mV s^-1 (3D N-Ti₃C₂T_x). (F) The potentiostatic discharging profiles of Li₂S precipitation (at 2.05 V) for 3D N-Ti₃C₂T_x. (G) The potentiostatic discharging profiles of Li₂S dissolution (at 2.35 V) for 3D N-Ti₃C₂T_xand 3D Ti₃C₂T_x. (H) Tafel plot. (I) The EIS plot of 3D N-Ti₃C₂T_x symmetrical battery containing Li₂S₆ electrolytes at different temperatures.