Figure 5 | NPG Asia Materials

Figure 5

From: Ruthenium nanocrystal decorated vertical graphene nanosheets@Ni foam as highly efficient cathode catalysts for lithium-oxygen batteries

Figure 5

(a) Ex situ X-ray diffraction (XRD) pattern of discharged ruthenium (Ru)-decorated vertical graphene nanosheets (VGNS)@Ni foam electrode. (b, c) Ex situ field emission scanning electron microscopy (FESEM) images of Ru-decorated VGNS@Ni foam electrode: (b) in the fully discharged state and (c) in the fully charged state. (d) Ex situ Raman spectra of discharged Ru-decorated VGNS@Ni foam electrode. The inset is an enlargement of the Li2O2 peak. (e) In situ differential electrochemical mass spectrometry (DEMS) analysis of the O2 consumption of Ru-decorated VGNS@Ni foam electrode during discharge process. (f) In situ DEMS analysis of O2 and CO2 evolution of Ru-decorated VGNS@Ni foam electrode during charge process.

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