Fig. 1. Microstructure and morphology of the synthesized Ni(HCO3)2/rGO. SEM images: (a) aerogel of the Ni(HCO3)2/rGO, (b and c) cross section, showing that most of the Ni(HCO3)2 nanocubes are embedded in the 3D layered rGO network, and (d and e) plane part, showing that most of the Ni(HCO3)2 nanocubes are wrapped by rGO films; (f and g) TEM, and (h) HRTEM images; (i) XRD pattern; (j) TEM image of the selected area, (k) elemental mapping images, and (l) EDS spectrum, showing the uniform presence of C, O, and Ni.
