Synergistic interaction between magnesium and iron layered hydroxide with enhanced supercapacitor performance

Abstract

The utility of multivalent metal ions with aqueous electrolyte increases the electrochemical performances of supercapacitors. These compounds are non- toxic, low cost and provide accessible ionic potential towards the application’s scenario. Herein, we report a facile and effective combination of magnesium and iron layered double hydroxides (L-MFH) synthesized by industrially applicable electrodeposition technique. As of now, the bulky compositions between the metals, poor ionic conductivity and deteriorated nanostructure limits the innovation in supercapacitors. Interestingly, L-MFH dendritic structure delivers high specific capacity, 610 Cg−1 at 10 mV/s in 1 M NaOH electrolyte. The derived material retains 80% specific capacity over 3000 cycles, further the asymmetric device through the combination of L-MFH//ACC (activated carbon cloth) delivered a high energy and power densities of 39.86 Whkg−1 and 1206.03 Wkg−1, respectively. Our prescribed methodology encourages the reliability of electrode preparations, which promotes high performances of many hybrid devices.