| 초록 |
Nanostructured hybrid metal oxide@rGO electroactive material was directly coated on nickel-foam (NF) using two step binder-free and additive-less hydrothermal method. The material interface plays a vital role to control the dimensions of grown metal oxide nano-needle structure. The nano-needle dimensions in the case of bare NF are longer and thicker than rGO coated NF due to different surface energy. However, the smaller nano-needles grown on rGO coated NF reveals superior electrochemical performance like specific capacitance, coulombic efficiency, cycling stability, etc. compare to bare NF in alkaline 2 M KOH electrolyte due to improved interface resistances and adhesion. Whereas, rGO coated NF electrode demonstrate good capacitive response in negative potential window in the same alkaline electrolyte. So, the fabricated hybrid supercapacitor (HSC) reveals excellent electrochemical performance. |
