Figure 5 | Scientific Reports

Figure 5

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

Figure 5

Two-electrode cell data for devices.

(a) A digital image of a 1 cm AFSC. (b) CV curves of the asymmetric GF/NiCo2S4//GF-802 AFSC with different operation voltages at the scan rate of 20 mV s−1. (c) CV curves of the AFSC at scan rates from 2 to 10 mV s−1. (d) Discharged curves of AFSCs at applied currents from 30 to 90 μA. (e) Charged and discharged curves of AFSCs at current density of 424.3 mA cm−3. (f) Volumetric (area) capacitance vs. volumetric (area) current density for AFSCs. (g) Cell capacitance as a function of current density for AFSCs. (h) Ragone plots for our AFSCs compared with commercially available energy-storage systems. Data of the Li battery, Al electrolytic capacitors and the 5.5 V/100 mV commercial SC were reproduced from ref. 12. Data for biscrolled SC are from ref. 41. (i) Cycle life of the asymmetric GF/NiCo2S4//GF-802 AFSC.

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