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Electrochemical impedance spectroscopy as a non-destructive tool to investigate lithium ion battery aging

Dreizler, Andreas and Fitz, Oliver Sebastian and Wagner, Norbert and Friedrich, K. Andreas (2017) Electrochemical impedance spectroscopy as a non-destructive tool to investigate lithium ion battery aging. 11th International Symposium on Electrochemical Impedance Analysis, 06.-10. Nov. 2017, Camogli, Italien.

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In order to run lithium ion batteries in a secure and lifetime optimized way, it is essential to understand the cell degradation behavior due to load cycling and calendar aging. Thereby, cell degradation is associated with an increasing cell resistance. For automotive applications battery cells will usually be replaced when the cell capacity drops under 80% or the internal ohmic resistance is doubled in comparison to the new state. A very useful and non-destructive method to detect increasing cell resistances during cell operation is electrochemical impedance spectroscopy (EIS). One main reason for increasing ohmic resistances during load cycling is attributed to a growing solid electrolyte interface (SEI) located at the phase boundary between graphite anode and electrolyte. In this work we present first results of EIS measurements as a function of different operating parameters. In this context, a useful tool to interpret EIS spectra is the use of suitable equivalent circuits to simulate battery components, chemical reactions and mass transfer limitations. All experiments are performed with different electrode materials assembled in self-build coin cells (LIR2032 body).

Item URL in elib:https://elib.dlr.de/115275/
Document Type:Conference or Workshop Item (Poster)
Additional Information:Posterpreis (Best Poster Award)
Title:Electrochemical impedance spectroscopy as a non-destructive tool to investigate lithium ion battery aging
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dreizler, AndreasAndreas.Dreizler (at) dlr.dehttps://orcid.org/0000-0003-2681-6350
Fitz, Oliver SebastianOliver.Fitz (at) dlr.deUNSPECIFIED
Wagner, NorbertNorbert.Wagner (at) dlr.dehttps://orcid.org/0000-0002-2596-8689
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:6 November 2017
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Elektrochemische Impedanz-Spektroskopie; Lithium-Ionen-Batterie; Alterung; Degradation
Event Title:11th International Symposium on Electrochemical Impedance Analysis
Event Location:Camogli, Italien
Event Type:international Conference
Event Dates:06.-10. Nov. 2017
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Dreizler, Dr. Andreas
Deposited On:01 Dec 2017 12:58
Last Modified:31 Jul 2019 20:12

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