<p>Electrodeposition of an indium-based coating on a stainless steel mesh current collector was performed using an ionic liquid comprising InCl₃. Aqueous (alkaline and neutral) and non-aqueous (ionic liquid) electrolytes were used to cycle indium-coated steel mesh. The indium-based electrode was not electrochemically stable in aqueous solutions because the indium layer was oxidized and dissolved during cycling. The ionic liquid, on the other hand, could be employed as a cycling electrolyte for indium-based coatings on stainless steel since the indium-based layer did not dissolve when the electrode was scanned in a non-aqueous ionic liquid electrolyte. The electrode’s structure and composition analysis established the production of In₂O₃ in the ionic liquid electrolyte. After cycling in ionic liquid environments, the In₂O₃ film exhibited cubic and rhombohedral structures. When indium-coated steel mesh is cycled in an ionic liquid medium at the negative potential window, it exhibits redox peaks, whereas uncoated steel is not electroactive at the same potential window. As a result, stainless steel mesh covered with In₂O₃ is a potential negative electrode for energy storage devices. Under these conditions, the specific capacitance of the electrode reached 150&#xa0;F&#xa0;g⁻¹.</p> Graphical Abstract