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An electrochemical impedance spectroscopy method applied to porous LiMn2O4 and metal hydride battery electrodes
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0001-9203-9313
2003 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 150, no 2, A234-A241 p.Article in journal (Refereed) Published
Abstract [en]

An electrochemical impedance spectroscopy method utilizing the signals from reference electrodes positioned in front of and behind a porous electrode is investigated. The basis for the method is illustrated theoretically, and limiting values under different assumptions are presented. The method was applied to a porous metal hydride and a LiMn2O4 battery electrode. It was concluded that the method facilitates the separation of local impedance effects from the effects of the potential distribution in the porous electrode. Consequently, a more accurate determination of local kinetic parameters and the effective conductivity in the pore electrolyte could be obtained.

Place, publisher, year, edition, pages
2003. Vol. 150, no 2, A234-A241 p.
Keyword [en]
cells
Identifiers
URN: urn:nbn:se:kth:diva-22193DOI: 10.1149/1.1538225ISI: 000180517000014OAI: oai:DiVA.org:kth-22193DiVA: diva2:340891
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Lindbergh, Göran

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