Journal of Physical Chemistry C
Journal of Physical Chemistry C
5 years ago

Quantitative Information about Electrosorption of Ionic Liquids in Carbon Nanopores from Electrochemical Dilatometry and Quartz Crystal Microbalance Measurements

Quantitative Information about Electrosorption of Ionic Liquids in Carbon Nanopores from Electrochemical Dilatometry and Quartz Crystal Microbalance Measurements
Volker Presser, Nicolas Jäckel, Steffen Patrick Emge, Bernhard Roling, Benjamin Krüner
Electrochemical energy storage using nanoporous carbons and ionic liquids enables large cell voltages and is a promising way to increase the energy density of electrical double-layer capacitors. The structure of the double layer in solvent-free electrolytes is fundamentally different from other systems with organic or aqueous solvents. In our study, we investigate the physical behavior of nanoporous carbon electrodes in contact with ionic liquids with a multilength scale approach by combining electrochemical quartz-crystal microbalance and electrochemical dilatometry. Synergistic combination of both in situ methods allows one to correlate system properties on particle and electrode level. We find that the charging mechanism at low charge is characterized by the exchange of more smaller ions by fewer larger ions. At higher charges, the system is changing to preferred counterion adsorption, which is resulting in a strong increase in the electrode volume. The maximum linear strain for a bulk electrode is 2% in our study, which is quite high for a supercapacitor system.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b06915

DOI: 10.1021/acs.jpcc.7b06915

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.