In this work, we have fabricated pseudocapacitor electrodes with 2D materials, including (Bi2WO6) and graphitic carbon nitride (g-C3N4)-based sandwich-like heterostructure by facile hydrothermal method. The synthesized Bi2WO6/g-C3N4 heterostructure nanocomposites were probed with different characterization techniques through X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray photon spectroscopy (XPS). The combination of Bi2WO6 and Bi2WO(6)-g-C3N4 created a synergistic and complemental effect, which enhanced the electrochemical performance. Bi2WO6-g-C3N4-based electrode exhibited a specific capacitance of 158 mF/g at a current density of 1 mA/cm(2). Binary nanocomposites-based electrodes displayed enriched capacity retention (90%) indicating better supercapacitive performance. C1 [Manikandan, V. S.; Harish, S.; Navaneethan, M.] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, India. [George, Kesiya; Shimna, M.] Cent Inst Petrochem Engn & Technol CIPET, Sch Adv Res Petrochem, Lab Adv Res Polymer Mat LARPM, Bhubaneswar 751024, India. [Thirumurugan, Arun] Univ Atacama, Sede Vallenar, Costanera 105, Vallenar 1612178, Chile. [Navaneethan, M.] SRM Inst Sci & Technol, Nanotechnol Res Ctr NRC, Chennai 603203, India. C3 SRM Institute of Science & Technology Chennai; Universidad de Atacama; SRM Institute of Science & Technology Chennai