Figure 4 | Scientific Reports

Figure 4

From: Transition metal sulfides grown on graphene fibers for wearable asymmetric supercapacitors with high volumetric capacitance and high energy density

Figure 4

Three-electrode cell data for fibers.

(a) CV curves of single fibers at the scan rate of 20 mV s−1 in aqueous 2.0 M KOH electrolyte from 0 to 0.5 V. (b) CV curves of GF/NiCo2S4 at scan rates from 2 to 30 mV s−1. (c) The volumetric capacitance as a function of scan rate for different fibers. (d) CV curves of single fibers at the scan rate of 50 mV s−1 in aqueous 2.0 M KOH electrolyte from −1.0 to 0 V. (e) Comparative CV curves obtained for the GF-802 and GF/NiCo2S4 fibers at the scan rate of 50 mV s−1. (f) Electrochemical impedance measurement of GF/NiCo2S4 in 2.0 M KOH solution.

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