Mesoporous spheres of Dy2NiMnO6 synthesized via hydrothermal route for structural, morphological, and electrochemical investigation

Here, we report the synthesis of the double perovskite-mesoporous spheres of Dy2NiMnO6 via hydrothermal process exhibiting P21/n monoclinic symmetry. Field emission electron micrographs confirmed the formation of porous spheres. The elemental mapping exhibited the homogenous distribution of metal ions, i.e., Dy3+, Ni2+, and Mn3+/Mn4+ as observed via X-ray photoelectron spectroscopy. The Dy2NiMnO6 spheres exhibited a specific surface area of ~ 38 m2/g, with an average pore diameter of ~ 10 nm. The specific capacitance for mesoporous spheres of Dy2NiMnO6 has been found to be ~ 395.2 F/g at the scan rate of 0.5 A/g. Furthermore, mesoporous spheres of Dy2NiMnO6 displayed stability over 2500 cycles with 71% specific capacitance retention at constant current destiny of 3 A/g.