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On the understanding and improvement of high capacity lithium/sulfur (Li/S) batteries

Cañas, Natalia A. and Pascucci, Brigitta and Wagner, Norbert and Friedrich, K. Andreas (2014) On the understanding and improvement of high capacity lithium/sulfur (Li/S) batteries. 14th Ulm Electrochemical Talks (UECT), 24-25 March 2014, Ulm, Germany.

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Li/S batteries present many advantages including a high theoretical capacity (1675 Ah∙kg−1), high energy density (2500 Wh∙kg−1), and low cost of sulfur. However, degradation of the battery components at high cycle number and high discharge rates is still a problem. In this work, the investigations are focused on the understanding of the critical issues associated with the electrochemical and degradation processes occurring in Li-S batteries. For this, different characterization techniques and experimental procedures were studied: X-ray diffraction for detection and quantification of crystalline products Li2S and S8 [1], electrochemical impedance spectroscopy for analysis of electrolyte resistance, charge transfer resistance in the electrodes, and reaction and dissolution of Li2S and S8 [2], UV-Vis spectroscopy for detection and quantification of dissolved species (mainly polysulfides) [3], as well as thermal analysis (TG/DSC) and mass spectroscopy to study the degradation of components and morphological changes on the cathode. The development of components and fabrication processes applicable at large-scale production and at low cost is also a great challenge for the commercialization of Li/S batteries. Here, we present developments related with the fabrication of industrially-oriented cathodes and the main factors affecting the battery capacity. Moreover, a new approach is investigated for the retention of active material in the bulk of the cathode.

Item URL in elib:https://elib.dlr.de/89621/
Document Type:Conference or Workshop Item (Poster)
Title:On the understanding and improvement of high capacity lithium/sulfur (Li/S) batteries
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Cañas, Natalia A.natalia.canas (at) dlr.deUNSPECIFIED
Pascucci, BrigittaBrigitta.Pascucci (at) dlr.deUNSPECIFIED
Wagner, Norbertnorbert.wagner (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:24 June 2014
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:lithium sulfur batteres
Event Title:14th Ulm Electrochemical Talks (UECT)
Event Location:Ulm, Germany
Event Type:international Conference
Event Dates:24-25 March 2014
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 - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Cañas, Natalia Andrea
Deposited On:14 Jul 2014 15:43
Last Modified:31 Jul 2019 19:46

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