Facile synthesis of Co-Ni-Mn oxide for high performance supercapacitor

摘要

Transition metal oxides possess unique properties for energy storage devices. In this study, Co-Ni-Mnternary metal oxide (Co-Ni-Mn-O) was synthesized in a facile way. Co-Ni alloy was first prepared bychemical reduction and then oxidized by potassium permanganate. MnO 2 was thus covered on the Co-Ni oxides. The Co-Ni-Mn-O has high electrochemical activity and can be used for supercapacitorelectrode. The Co-Ni-Mn-O demonstrates high specific capacitance as well as excellent rate capabilityand stability, which is promising for energy storage applications.