Højberg, Jonathan

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 20, 2017Analyzing Cell Resistance with Electrochemical Impedance Spectroscopy in Lithium-Air BatteriesHøjberg, JonathanPublication date:2012Link back to DTU OrbitCitation (APA):Højberg, J. (2012). Analyzing Cell Resistance with Electrochemical Impedance Spectroscopy in Lithium-AirBatteries. Abstract from Beyond Lithium Ion V, Berkeley, CA, United States.Analyzing Cell Resistance with Electrochemical Impedance Spectroscopy in Lithium-Air Batteries  J. Højberg* Haldor Topsøe A/S and Technical University of Denmark Kgs. Lyngby, Denmark  *jhoj@topsoe.dk   From a theoretical point of view, Lithium-Air batteries are currently the most promising battery system. The technology is however still in a premature state and commercialization is still years ahead. A further development of Lithium-Air batteries are depending on an improved understanding of the actual mechanisms involved during charge and discharge – both the desired and the undesired ones.  The electrochemical characterization of Lithium-Air battery systems are dominated by charge-discharge curves and cyclic voltammetry. Both methods are well suited as screening tools to distinguish different materials, but in complex systems like the Lithium-Air battery both methods are incapable of determining the reaction and degradation mechanisms and need to be complemented by other techniques. One promising supplement is the Electrochemical Impedance Spectroscopy (EIS) and although this technique is used widely within Lithium-Ion batteries, only few research groups have used it to characterize Lithium-Air batteries [1, 2].  This poster will introduce different EIS measurement series adapted to Lithium-Air batteries. The methods may be used to distinguish between different sources of internal resistance in the battery, differentiate cathode and anode reactions from each other and enable a quantitative description of relevant degradation mechanisms. Certain important features in the EIS spectra will be highlighted and examples of measurements, conducted at a Swagelok-setup, will be discussed.   References:  1. M. Mirzaeian and P. J. Hall, J. Power Sources 195 (2010) 6817-6824 2. M. Eswaran, N. Munichandraiah and L. G. Scanlon, Electrochemical and Solid-State Letters, 13 (2010) A121-A124 

Analyzing Cell Resistance with Electrochemical Impedance Spectroscopy in Lithium-Air Batteries

http://orbit.dtu.dk/ws/files/100079610/Analyzing_Cell_Resistance.pdf

Analyzing Cell Resistance with Electrochemical Impedance Spectroscopy in Lithium-Air Batteries

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