3D Hierarchical Co₃O₄ Twin‐Spheres with an Urchin‐Like Structure: Large‐Scale Synthesis, Multistep‐Splitting Growth, and Electrochemical Pseudocapacitors

Abstract Novel, 3D hierarchical Co 3 O 4 twin‐spheres with an urchin‐like structure are produced successfully on the large scale for the first time by a solvothermal synthesis of cobalt carbonate hydroxide hydrate, Co(CO 3 ) 0.5 (OH)·0.11H 2 O, and its subsequent calcination. The morphology of the p... View More