uniform growth of mn-sn-co ternary oxide nanostructure as a high-performance electrode material for electrochemical capacitor applications

Abstract: in recent years, population growth and economic-social development have increased dramatically the energy consumption, promoting the depletion of non-renewable resources while pushing environmental pollution to alarming levels [1]. thus, the electrochemical energy storage devices such as fuel cells, batteries, and supercapacitors play a vital role in fabrication of renewable, clean, more abundant and environmentally friendly energy systems. amongst the electrical energy storage devices, supercapacitors have attracted significant attention due to their fast charge-discharge ability, excellent rate capability, high power density, and long life stability. these outstanding properties of existing supercapacitors put them somewhere between batteries and regular capacitors [2,3]. in this work, we have developed a facile strategy to prepare mn-sn-co oxide ultrathin nanostructure on ni foam substrate through a fast electrochemical approach. the physicochemical characteristics of the material were investigated by various techniques such as energy dispersive x-ray analysis, field-emission scanning electron microscopy, and transmission electron microscopy. the prepared nanostructure was examined using various analytical methods and electrochemical activities such as cyclic voltammetry, galvanostatic charge and discharge analysis, electrochemical impedance spectroscopy, and cycle life measurements in 3 m koh electrolyte. impressively, the as-prepared mn-sn-co oxide nanostructure delivers a high specific capacity (1730 f g-1 at 1 a g-1), good rate capability, and excellent cyclic stability with 92.9% capacitance retention after 3000 cycles, suggesting the great application potential of this material in renewable energy storage.