fig5
Figure 5. Morphology of the N-C@TNO array after rate and long-term cycling. (A and B) SEM images, (C) TEM image, and (D) HRTEM image. TNO: TiNb2O7, titanium niobium oxide; N-C: N-doped carbon; TEM: transmission electron microscopy; HRTEM: high-resolution TEM; SEM: scanning electron microscope.
