Template-Free Synthesis of Nanorod-Assembled Hierarchical Zn 1-x Mn x S Hollow Nanostructures with Enhanced Pseudocapacitive Properties.

Mixed-metal sulfide Zn1-x Mnx S nanorod-assembled hierarchical hollow spheres were synthesized by a template-free solvothermal process based on Ostwald ripening. In the reaction system, glycerol plays a key role in the formation of Znx Mn1-x S hierarchical hollow structures by a quasi-microemulsion-template mechanism. When applied as capacitor electrode material, the hierarchical Zn1-x Mnx S hollow spheres show excellent electrochemical performance. Specifically, Zn0.25 Mn0.75 S 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 MnS under the same conditions and higher than those of previously reported single Mn-based compounds.