fig3

Figure 3. (A) Schematic of the synthesis, (B) SEM and (C) TEM images, and (D) cycling performance of hollow carbon nanofibers (HCNF)^[69]. (E) SEM and TEM images, (F) cycling performance of nitrogen-rich hollow carbon nanotubes (NCNT)^[70]. (G) SEM and (H) TEM images, (I) rate performance, and (J) cycling performance of SnS hollow nanofibers (SnS HNFs)^[71].