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Investigation of rechargeable lithium-sulfur batteries by in-situ techniques

Canas, Natalia and Hirose, Kei and Pascucci, Brigitta and Wagner, Norbert and Friedrich, K. Andreas and Hiesgen, Renate (2013) Investigation of rechargeable lithium-sulfur batteries by in-situ techniques. 13th International Conference on Electrified Surfaces, 30. Juni -3. Juli 2013, Chateau Liblice, Czech Republic.

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Abstract

The lithium-sulfur (Li-S) battery is currently of great interest for the research community. This battery promises with its high theoretical capacity (1675 mA h-1) and energy density (2600 Wh kg-1) to be one of the energy storage systems of the future. Nevertheless, the electrochemical processes and degradation mechanisms of the cell are still not well understood. In this work, in-situ characterization methods were applied for the characterization of reaction products and changes in the electrode properties. By means of XRD, the formation of reaction products during charging and discharging were monitored in operando. The formation of dilithium sulfide and the recrystallization of sulfur have been semi-quantitatively determined. The electrochemical behavior of the cell was also investigated using electrochemical impedance spectroscopy (EIS) at different depths of discharge and charge; and up to 50 cycles. An electrical circuit is proposed to quantify the impedance contribution of the cell. Changes in the electrolyte resistance and charge transfer resistance due layer formation on the electrode are amongst others the analyzed processes in this research. Furthermore, ex-situ atomic force microscopy (AFM) measurements provide information about changes in the electrical conductivity of the cathode surface.

Item URL in elib:https://elib.dlr.de/84596/
Document Type:Conference or Workshop Item (Poster)
Title:Investigation of rechargeable lithium-sulfur batteries by in-situ techniques
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Canas, Natalianatalia.canas (at) dlr.deUNSPECIFIED
Hirose, Keikei.hirose (at) dlr.deUNSPECIFIED
Pascucci, BrigittaBrigitta.Pascucci (at) dlr.deUNSPECIFIED
Wagner, Norbertnorbert.wagner (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Hiesgen, Renaterenate.hiesgen (at) hs-esslingen.deUNSPECIFIED
Date:2 July 2013
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Lithium-Schwefelbatterie In-Situ Messtechnik XRD AFM
Event Title:13th International Conference on Electrified Surfaces
Event Location:Chateau Liblice, Czech Republic
Event Type:international Conference
Event Dates:30. Juni -3. Juli 2013
Organizer:International Society of Electrochemistry
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (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:23 Oct 2013 10:50
Last Modified:31 Jul 2019 19:42

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