期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 37, 页码 11237-11245出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12037f
关键词
-
资金
- National Science Council of Taiwan [NSC 100-2221-E-002-242-MY2, NSC 101-3113-E-008-003]
- Academia Sinica, Taipei, Taiwan [AS-100-TP-A05]
A novel core-shell heterostructure with multi-walled carbon nanotubes as the core and graphene oxide nanoribbons as the shell (MWCNT@GONR), fabricated by the facile unzipping of MWCNTs with the help of microwave energy, was used as a supercapacitor (SC) electrode material. Graphene nanopowder (GNP) and multi-walled carbon nanotubes (MWCNTs) have also been applied as SC materials for comparison. A smooth surface and a tube-like structure are found for the GNP and MWCNTs, respectively, while for the MWCNT@GONR material, graphene oxide sheet structures are observed on both sides of central nanotube cores that retain their tube-like structure. The specific capacitance is much better for the SC electrode with the MWCNT@GONR (252.4 F g(-1)) compared to the SC electrodes with commercial MWCNTs (39.7 F g(-1)) and GNP (19.8 F g(-1)), as determined using cyclic voltammetry (CV) at a scan rate of 50 mV s(-1), which is due to the defective edges of the nanostructures in the former. The SC electrode with the MWCNT@GONR also exhibits good stability and capacitance retention even after 1000 cycles of galvanostatic charge-discharge testing, indicating its potential as a SC material. CV, galvanostatic charge-discharge (GC/D) and electrochemical impedance spectroscopy (EIS) were applied to analyze the SC performance.
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