Hierarchical mesoporous NiCo2O4@MnO2 core-shell nanowire arrays on nickel foam for aqueous asymmetric supercapacitors

作者：Xu, Kaibing; Li, Wenyao; Liu, Qian; Li, Bo; Liu, Xijian; An, Lei; Chen, Zhigang; Zou, Rujia^*; Hu, Junqing

来源：Journal of Materials Chemistry A, 2014, 2(13): 4795-4802.

DOI：10.1039/c3ta14647b

• HIGH-PERFORMANCE
• ACTIVATED CARBON
• NI FOAM
• ELECTRODE MATERIALS
• NANOSHEET ARRAYS
• HIGH-POWER
• OXIDE
• GROWTH
• PAPER
• NANOSTRUCTURES

We demonstrate the design and fabrication of hierarchical mesoporous NiCo2O4@MnO2 core-shell nanowire arrays on nickel foam via a facile hydrothermal and electrodeposition process for supercapacitor applications. In order to increase the energy density and voltage window, a high-voltage asymmetric supercapacitor based on hierarchical mesoporous NiCo2O4@MnO2 core-shell nanowire arrays on nickel foam as the positive electrode and activated carbon (AC) as the negative electrode was successfully fabricated. The as-fabricated asymmetric supercapacitor device achieved a specific capacitance of 112 F g(-1) at a current density of 1 mA cm(-2) with a stable operational voltage of 1.5 V and a maximum energy density of 35 W h kg(-1). The present NiCo2O4@MnO2 core-shell nanowire arrays with remarkable electrochemical properties could be considered as potential electrode materials for next generation supercapacitors in high energy density storage systems.

• 出版日期2014
• 单位东华大学