Document Type

Article

Publication Date

8-17-2015

Publication Title

Journal of the Electrochemical Society

DOI

10.1149/2.0031512jes

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.

Comments

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.

Copyright by The Author(s) 2015. Published by ECS.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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