alpha-Fe2O3@PANI-Core Shell Nanowire Arrays as Negative Electrodes for Asymmetric Supercapacitors

作者：Lu, Xue-Feng; Chen, Xiao-Yan; Zhou, Wen; Tong, Ye-Xiang; Li, Gao-Ren^*

来源：ACS Applied Materials & Interfaces, 2015, 7(27): 14843-14850.

DOI：10.1021/acsami.5b03126

• alpha-Fe2O3@PANI
• hybrid
• core-shell nanowire
• negative electrode
• supercapacitor

Highly ordered three-dimensional alpha-Fe2O3@PANI core-shell nanowire arrays with enhanced specific areal capacity and rate performance are fabricated by a simple and cost-effective electrodeposition method. The alpha-Fe2O3@PANI core shell nanowire arrays provide a large reaction surface area, fast ion and electron transfer, and good structure stability, which all are beneficial for improving the electrochemical performance. Here, high-performance asymmetric supercapacitors (ASCs) are designed using alpha-Fe2O3@PANI core-shell nanowire arrays as anode and PANT nanorods grown on carbon cloth as cathode, and they display a high volumetric capacitance of 2.02 mF/cm(3) based on the volume of device, a high energy density of 0.35 mWh/cm(3) at a power density of 120.51 mW/cm(3), and very good cycling stability with capacitance retention of 95.77% after 10 000 cycles. These findings will promote the application of alpha-Fe2O3@PANI core-shell nanowire arrays as advanced negative electrodes for ASCs.

• 出版日期2015-7-15
• 单位中山大学