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A novel nanocomposite consisting of p-conjugated 2-aminoterephthalic acid (ATA) coated iron oxide\ud(Fe3O4) nanoparticles and reduced graphene oxide (RGO) has been synthesized using a facile\udcombination of wet-chemistry and low-power sonication. The ATA–Fe3O4/RGO nanocomposites\udexhibited a high specific capacitance of the order of 576 F g1; significantly higher than that of pristine\udFe3O4 (132 F g1) and RGO (60 F g1) counterparts, indicative of a synergistic effect between the\udATA–Fe3O4 and RGO components. Furthermore, the maximum energy storage density was calculated to\udbe 75 W h kg1 (at a current density of 6 A g1). The charging–discharging analysis showed promising\udlong-term stability with nearly 86% retention of the capacitance after 5000 cycles. The superior\udcapacitive behaviour of these ATA–Fe3O4/RGO nanocomposites is attributed to the synergistic effect of\udthe p-conjugated ATA coating on Fe3O4 which enhances the pseudo-capacitive charge transfer process\udof Fe3O4 and works in conjunction with the surface functional groups (such as carboxylic, amino and\udamide) present on the RGO surface, providing enhanced double layer capacitance. Thus, the current\udsystem exploits the advantages of both the double layer capacitors and pseudocapacitors in a hybrid\udstructure

Novel π-conjugated iron oxide/reduced graphene oxide nanocomposites for high performance electrochemical supercapacitors