MOF-derived tremelliform Co3O4/NiO/Mn2O3 with excellent capacitive performance

Tremelliform Co3O4/NiO/Mn2O3 has been prepared by temperature-programmed calcination of the metal-organic framework (CoNiMn-MOF). The Co3O4/NiO/Mn2O3 possesses a quite large available surface area (123.9 m(2) g(-1)) and riches of mesopores. It displays a superior specific capacitance of 3652 mF cm(-2) in the concentrated potassium hydroxide solution when the current density is 1 mA cm(-2), and the rate property of the Co3O4/NiO/Mn2O3 is much well than its counterparts (Co3O4/NiO and Co3O4/Mn2O3). The energy density of the asymmetrical supercapacitor of rGO//Co3O4/NiO/Mn2O3 reaches to 65.7 Wh kg(-1) within 1.7 V potential window. Co3O4/NiO/Mn2O3 is a promising hybrid electrode materials for excellent performance supercapacitor as well as it provides a simple and economic way to fabricate supercapacitor composite materials.