Graphene/Sulfur@Graphene Composite Structure Material for a Lithium-Sulfur Battery Cathode

Figure 10

EIS of the cells with G/S-G, G/S, and S monolayer cathodes (a) before and (b) after 200 cycles at 0.1 C. (c) Equivalent circuit used to fit the impedance spectra.

(a)

(b)

(c)