The Comparative Study of Electrochemical Capacitance Performance between Sulphur-Doped Co₃O₄ and CoS Anodes

Figure 3

(a) CV curves collected for CoS and S-Co₃O₄ anodes at a scan rate of 100 mV/s. (b) CV curves collected for CoS anode at various scan rates. (c) Areal capacitance of the CoS anode as a function of the scan rate. (d) Galvanostatic charge-discharge curves of the S-Co₃O₄ and CoS anodes at a current density of 2 mA/cm². (e) Galvanostatic charge-discharge curves of the CoS anodes collected at different current densities. (f) Areal capacitance of the CoS anode collected from galvanostatic charge-discharge curves as a function of current density.

(a)

(b)

(c)

(d)

(e)

(f)