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Electrochemical measurements of the electronic density of states
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2015 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 90, no 9, 094005Article in journal (Refereed) Published
Abstract [en]

We present a simple electrochemical method, called intercalation spectroscopy, to study the electronic density-of-states of intercalation materials. It is based on the realization that electrochemical quasi-steady state potential curves of a number of materials exhibit fine structure in good agreement with features in the density of electronic states. Different electrochemical techniques are able to give this information, but chronopotentiometry appears to have advantages from an experimental viewpoint. In this paper we compare the so called 'electrochemical density-of-states' of amorphous and crystalline structures. We also address the limitations of intercalation spectroscopy due to kinetic effects, i.e. very slow relaxations of the charge carriers. Intercalation spectroscopy is in principle very sensitive, although in limited energy ranges, and is able to give information complementary to electron and x-ray spectroscopies for a number of materials.

Place, publisher, year, edition, pages
Uppsala Univ, Dept Engn Sci, Angstrom Lab, SE-75121 Uppsala, Sweden., 2015. Vol. 90, no 9, 094005
Keyword [en]
density of states, electrochemistry, intercalation
National Category
Physical Sciences Engineering and Technology
URN: urn:nbn:se:uu:diva-265594DOI: 10.1088/0031-8949/90/9/094005ISI: 000362492500006OAI: diva2:866497
Available from: 2015-11-03 Created: 2015-11-02 Last updated: 2015-11-17Bibliographically approved

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Niklasson, Gunnar A.
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