Fig. 9 | Communications Chemistry

Fig. 9

From: Cobalt doping of tin disulfide/reduced graphene oxide nanocomposites for enhanced pseudocapacitive sodium-ion storage

Fig. 9

Electrochemical properties. Electrochemical impedance spectra of the cells with SnS2/RGO (black squares), Sn0.9Co0.1Sx/RGO (red circles), Sn0.8Co0.2Sx/RGO (blue triangles) electrodes. Co doping of SnS2/RGO significantly improves the conductivity and diffusion of Na+. The diameter of semicircle for Sn0.9Co0.1Sx/RGO is much smaller as compared to SnS2/RGO in high-medium frequency region, suggesting lower contact and charge transfer resistance of Sn0.9Co0.1Sx/RGO than those of SnS2/RGO

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