One Pot Solvothermal Synthesis of Sandwich-like Mg Al Layered Double Hydroxide anchored Reduced Graphene Oxide: An excellent electrode material for Supercapacitor

This work coined a one pot synthesis method for the preparation of sandwiched like Mg/Al layered double hydroxide anchored reduced graphene oxide (RGO@ MgAl LDH) nanocomposite for super-capacitor electrode. XRD, FTIR and XPS analysis along with FESEM, AFM and TEM confirmed the sandwiched like structure. Morphological analysis revealed that Mg2+/Al3+ LDH plates are uniformly grown on the surface of reduced graphene oxide nanosheet. Electrochemical characterization of developed nanocomposites, in 1 M aqueous KOH, gives rise to a specific capacitance of 1334 F g(-1) at a current density of 1 Ag-1 in three electrode cell set up. However, in two electrode configuration, a specific capacitance of 1092.5 Fg(-1) has been achieved with 1 M TEABF(4) (in acetonitrile) as electrolyte at a current density of 2 Ag-1. The cyclic stability test shows about 87% retention of specific capacitance after 10000 consecutive charge-discharge cycles at a steady current density of 5 Ag-1 in 2 electrode organic electrolyte system. The energy density of the nanocomposite also shows a high value of 388.26 W h Kg(-1) at a current density of 2 Ag-1 and a power density of 3198.48 W Kg(-1) in two electrode organic electrolyte configuration. (C) 2016 Elsevier Ltd. All rights reserved.