DataVXACS Applied Materials & InterfacesPaper
journal article·2017-07-19

In Situ Measurement of Electrosorption-Induced Deformation Reveals the Importance of Micropores in Hierarchical Carbons

Christian Koczwara, Simon Rumswinkel, Christian Prehal, Nicolas Jäckel, Michael S. Elsässer, Heinz Amenitsch, Volker Presser, Nicola Hüsing, Oskar Paris

ACS Applied Materials & Interfaces· Volume 9· Issue 28
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Source abstract

Abstract

Dimensional changes in carbon-based supercapacitor electrodes were investigated using a combination of electrochemical dilatometry and in situ small-angle X-ray scattering. A novel hierarchical carbon material with ordered mesoporosity was synthesized, providing the unique possibility to track electrode expansion and shrinkage on the nanometer scale and the macroscopic scale simultaneously. Two carbons with similar mesopore structure but different amounts of micropores were investigated, employing two different aqueous electrolytes. The strain of the electrodes was always positive, but asymmetric with respect to positive and negative applied voltages. The asymmetry strongly increased with increasing microporosity, giving hints to the possible physical origin of electrosorption induced pore swelling.
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Research context

Energy storageNanomaterials

OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Membrane-based Ion Separation Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Physics, Montanuniversitaet Leoben, Franz-Josef Straße 18, 8700 Leoben, Austria

Materials Chemistry, Paris Lodron University Salzburg, Jakob-Haringer Strasse 2a, 5020 Salzburg, Austria

INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany

Department of Materials Science and Engineering, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany

Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/IV, 8010 Graz, Austria

Funding

?sterreichische Forschungsf?rderungsgesellschaft · German-Israeli Foundation for Scientific Research and Development

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