超级电容器
阳极
非阻塞I/O
材料科学
阴极
纳米管
纳米技术
电极
纳米棒
制作
电流密度
功率密度
碳纳米管
储能
纳米结构
电容
光电子学
电气工程
化学
功率(物理)
催化作用
物理
工程类
病理
物理化学
替代医学
生物化学
量子力学
医学
作者
Jinghuang Lin,Yaotian Yan,Haohan Wang,Xiaohang Zheng,Zhao Hua Jiang,Yiheng Wang,Junlei Qi,Jian Cao,Weidong Fei,Jicai Feng
标识
DOI:10.1016/j.jallcom.2019.04.273
摘要
Rational design and fabrication of advanced electrodes with tailored functionality is of great significance for high-performance asymmetric supercapacitors. Herein, we report the preparation of Fe2O3 nanotube arrays and core-branch NiO nanotube arrays directly on carbon paper by using ZnO nanorods as sacrificial templates via similar synthesis process, which works anode and cathode electrodes for the asymmetric supercapacitors. Benefiting from the free-standing nanotube nanostructures, a large number of surface active sites and fast ion diffusion paths, the Fe2O3 and NiO electrodes could achieve the high capacity up to 81.9 mAh g−1 and 119.7 mAh g−1, respectively. Further, an asymmetric supercapacitor is also assembled by using Fe2O3 as anode and NiO as cathode, which shows a high energy density of 48 Wh kg−1 at the power density of 2089 W kg−1. Current research may put a general route for constructing high-performance anode and cathode materials in energy storage devices.
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