Figure 4

SEM, TEM and EDS mapping images of (A,B and C) NiO@CNT, (D,E and F) Co3O4@CNT, (G,H and I) NiCoO2@CNT and (J,K and L) ZnCo2O4@CNT.

SEM, TEM and EDS mapping images of (A,B and C) NiO@CNT, (D,E and F) Co3O4@CNT, (G,H and I) NiCoO2@CNT and (J,K and L) ZnCo2O4@CNT.