Fig. 4: In situ Raman results of [Li(G4)][FSI] on six-layer graphene surface. | Nature Communications

Fig. 4: In situ Raman results of [Li(G4)][FSI] on six-layer graphene surface.

From: Unraveling the energy storage mechanism in graphene-based nonaqueous electrochemical capacitors by gap-enhanced Raman spectroscopy

Fig. 4

a In-situ SHINERS spectra of [Li(G4)][FSI] at Au@SiO2/six-layer graphene/Au. The purple Raman spectra correspond to the potential being negative relative to PZC, while the blue Raman spectra correspond to the potential being positive relative to PZC. b Proposed adsorption configuration of [Li(G4)][FSI] at six-layer graphene in different potential region (including E < PZC, E = PZC and E > PZC). F, S, O, N, C, H, and Li atoms are shown in green, yellow, red, cyan, gray, blue, and reseda, respectively. c Potential-dependent normalized intensity of the D band of graphene. d Potential-dependent frequency of the G band of graphene. Error bars represent s.d. for each data point (n  =  3 independent experiments), and points are average values.

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