Synthesis and characterization of graphene oxide-based nanocomposite NaCr₂O₄/GO for electrochemical applications

This work reports the synthesis of NaCr2O4/GO nanocomposite using co-precipitation method for energy storage applications. Characterizations e.g., scanning electron micro-scopy (SEM) and X-ray diffraction (XRD) were performed to investigate the important op-tical and structural properties. The Crystalline size is seen to decrease from 28 nm for sodium chromite to 16.56 nm for nanocomposite NaCr2O4/GO. Raman results showed the existence of characteristic peaks for NaCr2O4/GO. Using cyclic voltammetry, the specific capacitance for NaCr2O4/GO was measured to be 455.5 F/g. The NaCr2O4/GO nanohybrids depicted significantly higher values of specific capacitance combined with extremely low charge transfer resistance, useful for various applications. (c) 2021 The Author(s). Published by Elsevier B.V.