Effect of conducting polymer incorporated heterostructure morphology of MgCo2O4@PPy nanosheets: a novel cathode material for asymmetric supercapacitor applications

In this study,the facile hydrothermal synthesis of Magnesium–cobalttite MgCo 2 O 4 spinel with different morphologies, such as nanosheets and nanospheres has been investigated. The structural, morphological, textural, and chemical composition of the materials were examined using powdered X-ray diffraction (XRD), scanning electron microscopy (SEM), Transition electron mictroscopy (TEM), N 2 adsorption–desorption isotherm and X-ray photoelectron spectroscopy (XPS). The produced materials have heterostructure morphology with a nanospherical surface-coated nanosheet-like morphology that is clearly visible in the results of FESEM and TEM. The results of N2 adsorption–desorption reveal that MgCo 2 O 4 @PPy has a larger specific area of 103 m 2 g −1 than MgCo 2 O 4 , which has a specific area of 73 m 2 g −1 . The synthesized electrode material with inventive nanoarchitectures showed attractive electrochemical performance in a variety of applications. The heterostructure MgCo 2 O 4 @Ppy electrode produced an impressive capacitive retention of 93% at current density 5 Ag −1 and a high specific capacitacne of 988 Fg −1 after 10,000 cycles. The assembled ASC cell MgCo 2 O 4 @Ppy//AC provided remarkable high capacitance retention of 84% after 10,000 cycles at 5 Ag −1 , intensely high energy density of 40 Whkg −1 , and power density of 1544 Wkg −1 .