Tracking the structural arrangement of ions in carbon supercapacitor nanopores using in situ small-angle X-ray scattering

By Prehal, C.; Weingarth, D.; Perre, E.; Lechner, R. T.; Amenitsch, H.; Paris, O. & Presser, V.
Published in Energy Environ. Sci. The Royal Society of Chemistry 2015

Abstract

The charge storage mechanism and ion arrangement inside electrically charged carbon nanopores is a very active research field with tremendous importance for advanced electrochemical technologies, such as supercapacitors or capacitive deionization. Going far beyond the state of art, we present for the first time a comprehensive study of tracking ion electrosorption in aqueous electrolytes during charging and discharging of porous carbon electrodes using in situ X-ray scattering. We provide novel and quantitative insights into the local concentration of anions and cations and demonstrate that the global n

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