Abstract

• Supercapacitors have been widely distributed in recent years and are becoming one of the promising energy storage systems. In this work, hierarchical mesoporous Zn-Ni-Mn ternary oxide (ZNMO) films were firstly prepared to ongoing the supercapacitors by a simple hydrothermal method at different annealing temperatures. Hydrothermal treatment is conducted to prepare unusual ternary metal oxide nanostructures (nanocubes and hollow spheres). The structural and morphological properties of Zn-Ni-Mn ternary metal oxide films onto the nickel foam were characterized by some analytical methods such as X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM). The XRD analysis confirmed that the crystallographic phases of samples were in good agreement with the tetragonal structure for Zn-Ni-Mn ternary metal oxide film. SEM can be shown that the presence of non-homogeneous grains and having different grain sizes were found the surface morphology of Zn-Ni-Mn ternary metal oxide film.