Fig. 4From: Hierarchical Heterostructures of NiCo2O4@XMoO4 (X = Ni, Co) as an Electrode Material for High-Performance SupercapacitorsSEM images of the morphology evolution of the NiCo2O4@NiMoO4 nanosheet arrays formed via different reaction time: (a) 0.5 h, (b) 1 h, (c) 2 h, and (d) 4 hBack to article page