Template‐Free Synthesis of Nanorod‐Assembled Hierarchical Zn1−xMnxS Hollow Nanostructures with Enhanced Pseudocapacitive Properties

In this study, mixed-metal sulfide Zn1-xMnxS nanorod-assembled hierarchical hollow spheres are successfully synthesized via a template-free solvothermal process base on Ostwald ripening process. In the reaction system the glycerol plays a key role for the formation of ZnxMn1-xS hierarchical hollow structures through a "quasi-microemulsion-template" mechanism. When applied as capacitor electrode material, the hierarchical Zn1-xMnxS hollow spheres display excellent electrochemical performances. Specifically, Zn0.25Mn0.75S hollow spheres can deliver a high specific capacitance of 664 Fg-1 at a current rate of 1 Ag-1, which is almost five times of that of the MnS sample under the same conditions and higher than those of previously reported single Mn-based compounds.