Freestanding MnO₂ nanoflakes on carbon nanotube covered nickel foam as a 3D binder-free supercapacitor electrode with high performance

详细信息    查看全文

• 作者：Shuying Kong ; Kui Cheng ; ^{chengkui@hrbeu.edu.cn} ; Tian Ouyang ; Ke Ye ; Guiling Wang ; Dianxue Cao ; ^{caodianxue@hrbeu.edu.cn}
• 关键词：Manganese dioxide ; Dip & dry ; Carbon nanotube ; Hydrothermal ; Supercapacitor
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：786
• 期：Complete
• 页码：35-42
• 全文大小：1688 K
• 卷排序：786

文摘

A 3D electrode with CNT decorated on Ni foam is built for MnO2 growth. MnO2 nanoflakes uniformly grow on the 3D electrode via a simple hydrothermal method. MnO2 nanoflakes exhibit a specific capacitance as high as 402.5 F g− 1 at 1 A g− 1. The asymmetric supercapacitor exhibits an energy density of 25 Wh kg− 1 with 85.3% capacitance retention after 5000 cycles.