Hierarchical porous ZnMn 2 O 4 synthesized by the sucrose-assisted combustion method for high-rate supercapacitors

摘要: A simple sucrose-assisted combustion and subsequent high-temperature calcination route have been employed to prepare hierarchical porous ZnMn2O4 nanostructure. When used as an electrode for supercapacitor, the displays a high specific capacitance of 411.75 F g−1 at current density 1 g−1, remarkable retention rate 64.28 % 32 compared with well excellent cycle stability (reversible capacity 88.32 after 4000 cycles). The outstanding electrochemical performances are mainly attributed its architecture, which provides large reaction surface area, fast ion electron transfer, good structure stability. All these impressive results demonstrate that shows promise application in supercapacitors.