Additionally, the supercapacitor device with PVA gel
electrolyte shows higher area under the CV curves with symmetry
along the cathodic and anodic directions suggesting better supercapacitive
features of PVA gel electrolyte. Fig. 5(B) demonstrates
the charge–discharge curves of FSS-SCs with PVA, CMC and PEO
gel electrolytes at constant current density of 2 A g1