Figure 4

(a) low magnification, (b) high magnification HRTEM image, (c) TEM image, (d) corresponds FFT pattern, (f) SEM image and (e) element maps of the CNS/NiCo2O4 core-shell sub-microspheres.
(a) low magnification, (b) high magnification HRTEM image, (c) TEM image, (d) corresponds FFT pattern, (f) SEM image and (e) element maps of the CNS/NiCo2O4 core-shell sub-microspheres.