Role of surface functional groups in ordered mesoporous carbide-derived carbon/ionic liquid electrolyte double-layer capacitor interfaces

Pinkert K, Oschatz M, Borchardt L, Klose M, Zier M, Nickel W, Giebeler L, Oswald S, Kaskel S, Eckert J (2014)

Publication Type: Journal article

Publication year: 2014

Journal

ACS Applied Materials and Interfaces American Chemical Society

Book Volume: 6

Pages Range: 2922-2928

Journal Issue: 4

DOI: 10.1021/am4055029

Abstract

Ordered mesoporous carbide-derived carbon (OM-CDC) with a specific surface area as high as 2900 m2 g-1 was used as a model system in a supercapacitor setup based on an ionic liquid (IL; 1-ethyl-3-methylimidazolium tetrafluoroborate) electrolyte. Our study systematically investigates the effect of surface functional groups on IL-based carbon supercapacitors. Oxygen and chlorine functionalization was achieved by air oxidation and chlorine treatment, respectively, to introduce well-defined levels of polarity. The latter was analyzed by means of water physisorption isotherms at 298 K, and the functionalization level was quantified with X-ray photoelectron spectroscopy. While oxygen functionalization leads to a decreased capacitance at higher power densities, surface chlorination significantly improves the rate capability. A high specific capacitance of up to 203 F g-1 was observed for a chlorinated OM-CDC sample with a drastically increased rate capability in a voltage range of ±3.4 V. © 2014 American Chemical Society.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Pinkert, K., Oschatz, M., Borchardt, L., Klose, M., Zier, M., Nickel, W.,... Eckert, J. (2014). Role of surface functional groups in ordered mesoporous carbide-derived carbon/ionic liquid electrolyte double-layer capacitor interfaces. ACS Applied Materials and Interfaces, 6(4), 2922-2928. https://doi.org/10.1021/am4055029

MLA:

Pinkert, Katja, et al. "Role of surface functional groups in ordered mesoporous carbide-derived carbon/ionic liquid electrolyte double-layer capacitor interfaces." ACS Applied Materials and Interfaces 6.4 (2014): 2922-2928.

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