Enhancement of Electrochemical Performance of CuO/rGO/Incorporated PVDF Nano‐Composites in Stable and Efficient Application of Supercapacitators

ABSTRACT This investigation observed at preparing and investigating nanocomposites of copper oxide (CuO)/rGO@PVDF to determine their suitability for application in supercapacitors as electrodes. Analysis by FTIR showed that Cu‐O bonds are present around the region of 500 cm −1 . A size of 42 nm was found for the crystallites using the Debye Scherrer formula. The peaks in the XRD appear to be being generated by the monoclinic CuO. The finding implies that the material exhibits pseudocapacitive characteristics. It is evident from the SEM that the rGO sheets have CuO nanoparticles spread symmetrically. Samples imaged under the TEM indicated that the rGO had CuO nanoparticles that measured 20 nm. Results from EDX analysis confirmed 70% of carbon (C), 19% oxygen (O) and 10% copper (Cu), with 5% chlorine (Cl). The Raman spectra of rGO revealed a high number of defects, since the intensity ratio of the D band at 1350 cm −1 and G band at 1600 cm −1 was 1.18. Electrochemical analysis found that the material provided the same high cycling stability over 10,000 cycles, as confirmed by a specific capacitance (SC) of 180 F g −1 at 0.2 A g −1 going down to 50 F g −1 and the material retaining capacitance at over 90% of original. As a result, the study develops CuO/rGO@PVDF nanocomposites which may be selected as a suitable alternative in building high‐energy storage devices. This investigation proposes a CuO/rGO incorporated PVDF nanocomposite in which PVDF is not only used as a binder but also as an active structure that contributes to the improvement of the mechanical stability and durability of the electrochemical activity. The combination of the pseudocapacitance of CuO and the double‐layer capacitance of rGO in a flexible polymer matrix makes this particular arrangement potentially insightful into the creation of stable and high‐performance electrodes to the next‐generation supercapacitors. We propose to make the first contribution by making PVDF a working electrochemical matrix, which hosts both CuO and rGO and provides a pathway between binder and actor to the long‐life and high‐performance supercapacitors.