 This study investigated the synthesis of NECO-204 nanosheets on flexible AL and CU substrates using hydrothermal method. The thickness of the nanosheet was measured using three-dimensional profilometry and found to be 4.3 micrometers for AL and 8.4 micrometers for CU. The asymmetric supercapacitors were fabricated using NECO-204 and graphite electrodes and separated by filter paper. The performance of the supercapacitors was evaluated using cyclic voltammetry and galvanostatic charge discharge tests. The results reveal that the NECO-204-CU supercapacitor exhibited higher energy density and power density than the NECO-204-L supercapacitor. Furthermore, the NECO-204-CU supercapacitor showed superior electrochemical performance in terms of specific capacitance, energy density, and power density when operated in the basic KOH electrolyte. This article was authored by Abdelilah Alshinable, Boran Aldeen Albus, Bashar Aljourna, and others. We are article.tv, links in the description below.