Effect of brain-like shape polypyrrole nanomaterial on the capacitance and stability enhancements of β-Ni(OH)2 two-symmetric electrodes supercapacitor

β-Ni(OH) 2 /graphitic carbon nitride (G-C3N4) nanocomposite and brain-like shape polypyrrole are prepared using hydrothermal and oxidative polymerization, respectively. XRD, XPS, SEM, and TEM display the elemental, crystalline, and morphological properties of these nanomaterials. The SEM confirms the preparation of 2D sheets of G-C3N4 and brain-like shape polypyrrole. The hybrid supercapacitor is fabricated without/with the incorporation of polypyrrole material and then evaluated through the study of the electrochemical parameters of charge and cyclic voltammetry. The applications in a supercapacitor are carried out through the synthesis two-symmetric hybrid supercapacitor. There are enhancements in the cyclic voltammetry behavior after polypyrrole incorporation with the β-Ni(OH) 2 /G-C3N4 nanocomposite. At 0.3 A/g, the electrochemical charge is 122 and 142 s without/with the physical incorporation of polypyrrole, correspondingly. The supercapacitor specific capacitance ( C S ) values are 101 and 120 F/g without/with polypyrrole, respectively. Moreover, the retention stability is enhanced from 85.6 to 90.2% after polypyrrole addition, till 500 cycles. Soon, a prototype of this supercapacitor will be synthesized for industrial applications.