Article
Carbide-Derived Carbon by Electrochemical Etching of Vanadium Carbides
Journal of The Electrochemical Society
(2015)
Abstract
Carbide-derived Carbon (CDC) has been demonstrated to be an excellent electrode material for electrochemical devices including supercapacitors due to its chemical and electrochemical stability, large specific surface area and controllable pore size and morphology. Currently, CDC is prepared from metal carbides by chlorination in a chlorine gas atmosphere at temperatures of 350°C or higher. In this paper, conversion using electrochemical methods is reported, which can be achieved by oxidizing vanadium carbides (VC or V2C) in aqueous solutions at room temperature and a mild electrode potential to prepare CDC thin film as electrode materials for “on-chip” supercapacitiors. It was found that VC and V2C can both be oxidized at a potential of about 0.4 V vs. Ag/AgCl or higher in neutral, acidic, or basic solutions. After the oxidation, vanadium is readily detected in the electrolyte solutions by ICP-MS (Inductively Coupled Plasma – Mass Spectrometry). The so-produced CDC thin film electrode (ca. 2.0 - 2.6 μm thick) has a porous morphology and bears specific double layer capacitance values as high as 0.026 F.cm−2 (or 130 F.cm−3) with some dependence on the oxidation potential, time, and electrolyte solutions.
Keywords
- Carbide-derived Carbon,
- Electrochemical etching,
- supercapacitor
Disciplines
Publication Date
2015
DOI
10.1149/2.0031512jes
Publisher Statement
This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
Citation Information
Luis G. B. Camargo, Benjamin G. Palazzo, Greg Taylor, Zach A. Norris, et al.. "Carbide-Derived Carbon by Electrochemical Etching of Vanadium Carbides" Journal of The Electrochemical Society Vol. 162 Iss. 10 (2015) p. H811 - H815 ISSN: 0013-4651 Available at: http://works.bepress.com/lei-yu/2/
Creative Commons license
This work is licensed under a Creative Commons CC_BY International License.