期刊
JOURNAL OF POWER SOURCES
卷 196, 期 11, 页码 5209-5214出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2011.02.019
关键词
Supercapacitor; Exfoliated carbon nanotubes; Capacitance; Graphene; Multi-walled carbon nanotubes
资金
- UCSC
- NSF [DMR-0847786]
- National Natural Science Foundation of China [50973013]
We report for the first time the enhanced capacitance of multi-walled carbon nanotubes (MWCNTs) after exfoliation. Transmission electron microscopy studies confirmed that the MWCNTs were partially exfoliated with improved effective surface area. Carbon cloth electrode deposited with partially exfoliated carbon nanotubes (Ex-CNTs) yielded specific capacitances in a range of 130-165 F g(-1) at charging/discharging current densities from 5 to 0.5 A g(-1), with coulombic efficiencies of similar to 98%. The specific capacitance of Ex-CNTs was an order of magnitude higher than untreated MWCNTs, and comparable to graphene at all charging/discharging current densities we studied. The enhanced capacitance can be attributed to improved effective surface area and increased defect density of the exfoliated tubular structure. The results declared that Ex-CNTs are promising electrode materials for high-capacitance supercapacitors. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据