Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7991549 | Journal of Alloys and Compounds | 2018 | 25 Pages |
Abstract
In this work, the hybrid nanostructures composed of Ni-Co hydroxide, reduced graphene oxide (rGO) and carbon nanotubes (CNTs) are successfully synthesized and used as a self-supported electrode for supercapacitors. It is found that the hybrid shows a big capacity of 1093â¯Fâ¯gâ1, excellent rate capability, and superior cycle life (100% capacity maintain after 5000 cycles). One asymmetric supercapacitor (ASC) is developed using Ni-Co hydroxide/rGO/CNTs as positive material and active carbon as negative material. This ASC displays a maximum energy density of 34.7â¯Wh kgâ1 at a high power density of 1.55â¯kWâ¯kgâ1 and still keeps 20.7â¯Wh kgâ1 at 15.5â¯kWâ¯kgâ1. Moreover, it displays remarkable cycle life with 112.8% capacity retention after 10000 cycles. Such asymmetric supercapacitor demonstrates great potential for practical application in energy storage devices.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zhi-Qiang Hou, Feng-Shou Tian, Yong-Ping Gao, Wen Wu, Li-Xia Yang, Xiao-Lu Jia, Ke-Jing Huang,