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Relaxation Impedance - The Nature of Inductive and capacitive Behaviour in Low Frequency Impedance Spectra of Corroding Electrodes, Batteries and Fuel Cells

Schiller, Carl-Albrecht and Richter, Franz and Wagner, Norbert (2012) Relaxation Impedance - The Nature of Inductive and capacitive Behaviour in Low Frequency Impedance Spectra of Corroding Electrodes, Batteries and Fuel Cells. 63rd Annual Meeting of the International Society of Electrochemistry (ISE), 19.-24 August 2012, Prag.

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Abstract

Some electrochemical systems may exhibit small inductive contributions to the overall frequency response, especially at low frequencies. Prominent examples are for instance corroding electrodes of Aluminium and Zirconium in the presence of chloride ions, mild steel in the presence of CO2 at low pH value, high temperature fuel cells under certain load conditions, PEM fuel cells in the presence of CO in the fuel or rechargeable batteries under high current charging/discharging conditions. A lot of different mechanisms are discussed in the literature explaining very special situations, leading to inductive behaviour of electrochemical systems. On the other hand, a very universal mechanism, the Relaxation Impedance, is able to explain the above examples and - beyond that - the appearance of low frequency capacitive loops in conjunction with the PEM membrane water balance. Although some principal considerations can be found in literature, a comprehensive and thoroughly treatment is still outstanding so far.

Item URL in elib:https://elib.dlr.de/77284/
Document Type:Conference or Workshop Item (Speech)
Title:Relaxation Impedance - The Nature of Inductive and capacitive Behaviour in Low Frequency Impedance Spectra of Corroding Electrodes, Batteries and Fuel Cells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schiller, Carl-AlbrechtZahner-elektrik GmbHUNSPECIFIED
Richter, FranzZahner-elektrik GmbHUNSPECIFIED
Wagner, NorbertTTUNSPECIFIED
Date:21 August 2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Relaxationsimpedanz Brennstoffzellen Batterien Korrosion
Event Title:63rd Annual Meeting of the International Society of Electrochemistry (ISE)
Event Location:Prag
Event Type:international Conference
Event Dates:19.-24 August 2012
Organizer:International Society of Electrochemistry (ISE)
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Wagner, Dr.rer.nat. Norbert
Deposited On:18 Sep 2012 08:33
Last Modified:18 Sep 2012 08:33

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