Cañas, Natalia A. and Baltazar, Ana and Morais, Micael Ângelo and Freitag, Thomas Oliver and Wagner, Norbert and Friedrich, K. Andreas (2015) Fabrication of sulfur cathodes by wet-powder spraying and the understanding of degradation. Electrochimica Acta, 157, pp. 351-358. Elsevier. doi: 10.1016/j.electacta.2015.01.002. ISSN 0013-4686.
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Official URL: http://www.elsevier.com/locate/electacta
Abstract
In this work, wet powder spraying is presented as an alternative method for the fabrication of sulfur/carbon composite cathodes. The high dispersion and homogeneity of the cathode layer result in high capacity Li/S batteries. Additional use of LiNO3 as additive improved the discharge capacity to 800 Ah kgS, 400 Ah kgcathode (at 0.18 C) and 410 Ah kgS, 205 Ah kgcathode (at 2 C) after 50 cycles. The shuttle mechanism is reduced and a coulombic efficiency of around 100% is reached and maintained constant until 1000 cycles. To understand more the degradation mechanisms of the battery, Thermogravimetry combined with gas analysis (TG/MS) as well X-ray diffraction (operando and mappings) were applied. The formation of an amorphous phase during cycling that remains nearly stable in the later cycles is considered to be one of the main factors affecting capacity decay. Moreover, others processes are identified as contributors of battery degradation like PVDF decomposition, structural changes of carbon black, and reduction of sulfur content on the bulk of the electrode. These new insights on the degradation processes may contribute to the further understanding, selection of materials, and improvement of this battery.
Item URL in elib: | https://elib.dlr.de/99192/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Title: | Fabrication of sulfur cathodes by wet-powder spraying and the understanding of degradation | ||||||||||||||||||||||||||||
Authors: |
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Date: | 2015 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Electrochimica Acta | ||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||
Volume: | 157 | ||||||||||||||||||||||||||||
DOI: | 10.1016/j.electacta.2015.01.002 | ||||||||||||||||||||||||||||
Page Range: | pp. 351-358 | ||||||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||||||
ISSN: | 0013-4686 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | Lithium sulfur batteries spraying degradation | ||||||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | ||||||||||||||||||||||||||||
HGF - Program Themes: | Electrochemical Energy Storage | ||||||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||||||
DLR - Program: | E EV - Energy process technology | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Processes (Batteries) (old) | ||||||||||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||||||||||
Deposited By: | Friedrich, Prof.Dr. Kaspar Andreas | ||||||||||||||||||||||||||||
Deposited On: | 15 Dec 2015 11:44 | ||||||||||||||||||||||||||||
Last Modified: | 27 Nov 2023 12:41 |
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