fig3
Figure 3. Structural characterization of the Cu@CNT/S electrode after 80 cycles. (A) XRD pattern; (B and C) TEM images, inset in (B) is the size distribution diagram, (D) SAED pattern, and (E) S 2p XPS spectrum of Cu@CNT/S electrode after 80 cycles. Cross-section SEM image of the pristine Cu@CNT/S electrode (F) and cycled Cu@CNT/S electrode after 80 cycles (G). SEM images of the pristine Cu-CC surface (H) and cycled Cu-CC surface after 80 cycles (I).
