Fig. 2From: Hierarchical Heterostructures of NiCo2O4@XMoO4 (X = Ni, Co) as an Electrode Material for High-Performance Supercapacitors a, b Low- and high-magnification SEM images of as-prepared NiCo2O4 nanosheet arrays on the Ni foam. c TEM image of a NiCo2O4 nanosheet. d XRD pattern of the product scratched from the Ni foamBack to article page