Using impedance spectroscopy to probe conductivity properties in electrode materials

specialized e-chem cellsTo kick off the working group on “Electronic and Ionic Conduction of Electrode Materials” at the Danish Battery Symposium 2016, Daniel Sørensen held a short presentation about the use of impedance spectroscopy to obtain values related to conductivity properties in electrode materials. Steen and Eivind mentioned that the impedance measured was very dependent on the geometry of the electrode, and the size and shape of the particles. This led to a discussion regarding the bulk resistance (ideally in single crystals) versus the resistance typically measured in whole battery cells. Daniel presented two cases about the measurement of the bulk electronic and ionic conductivities, and techniques to separate them. See his presentation by following the link below:

Presentations from the working groups
(https://drive.google.com/folderview?id=0B1XEeNNxnSyOcVU1Z1dEU2JqTms&usp=sharing)

WG2: Electronic and Ionic Conduction of Electrode Materials

Click here to see details about Working Group 2: Electronic and Ionic Conduction of Electrode Materials

Daniel Risskov Sørensen

Daniel received his BSc in Inorganic Chemistry and Crystallography from the University of Southern Denmark in 2008, where he worked on crystalline molecular macrocycles for the storage of hydrogen.

His Master’s project in 2010 was a collaboration between SDU, with Eivind Skou as supervisor, and DTU Risø. The subject was the transport properties of lanthanum strontium manganates for use in Solid Oxide Fuel Cells. He received his PhD degree in 2014 on the subject of medium temperature fuel cells and electrolyzers from SDU. This project was part of the larger MEDLYS project, and the work was done in close collaboration with DTU Lyngby. Currently, he holds a postdoctoral position at SDU with Dorthe Ravnsbæk as supervisor, where he works on rechargeable magnesium and lithium batteries.

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