fig3
![Constructing three-dimensional architectures to design advanced anodes materials for sodium-ion batteries: from nanoscale to microscale](https://image.oaes.cc/3d9040ff-fca5-469a-bb18-aacb7645bea9/em4063.fig.3.jpg)
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].