Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/32825
Title: The impact of polymeric binder on the morphology and performances of sulfur electrodes in lithium–sulfur batteries
Authors: SHAFIQUE, Ahmed 
Rangasamy, Vijay Shankar
Vanhulsel, Annick
SAFARI, Momo 
VAN BAEL, Marlies 
HARDY, An 
Sallard, Sebastien
Issue Date: 2020
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Source: ELECTROCHIMICA ACTA, 360 (Art N° 136993)
Abstract: In this research work, three different polymers LiPAA, PVDF, and PEO were used as polymeric binders for the sulfur electrodes in Li-S cells. All electrodes had a high sulfur, loading similar to 4.0 mg per cm(2). The coincells were characterized by EIS and tested by constant current cycling and cyclic voltammetry using a standard electrolytic solution of LiTFSI in an ether mixture with LiNO3 as additive. The cycled sulfur electrodes were characterized by post-mortem SEM and N-2-sorption and compared to the pristine states. LiPAA-based cells showed the highest reproducibility of the electrochemical performances, the most limited specific capacity fading (at least twice smaller), and the better rate capability compared to PVDF- and PEO-based cells. The electrochemical data agreed with the post-mortem analyses of the different electrodes. The pristine electrodes showed similar morphologies and porosities independent of the polymeric binder used. Dramatic changes were observed for the PEO- and PVDF-based sulfur electrodes, in which a new dense morphology appeared after two and thirty cycles, respectively. Both PEO- and PVDF-based cycled electrodes were prone to delaminate from the current collector. In comparison, the morphology of the LiPAA-based sulfur electrodes remained mostly unchanged even after thirty cycles and no delamination behavior could be observed.
Notes: Sallard, S (corresponding author), VITO Flemish Inst Technol Res, Sustainable Mat, B-2400 Mol, Belgium.; Hardy, A (corresponding author), Hasselt Univ, Inst Mat Res IMO Imomec, UHasselt, Martelarenlaan 42, B-3500 Hasselt, Belgium.; Hardy, A (corresponding author), Energyville, Thor Pk 8320, B-3600 Genk, Belgium.
an.hardy@uhasselt.be; sebastien.sallard@vito.be
Other: Sallard, S (corresponding author), VITO Flemish Inst Technol Res, Sustainable Mat, B-2400 Mol, Belgium. Hardy, A (corresponding author), Hasselt Univ, Inst Mat Res IMO Imomec, UHasselt, Martelarenlaan 42, B-3500 Hasselt, Belgium ; Energyville, Thor Pk 8320, B-3600 Genk, Belgium. an.hardy@uhasselt.be; sebastien.sallard@vito.be
Keywords: Lithium polyacrylate;Binder;Ageing;Sulfur;Lithium
Document URI: http://hdl.handle.net/1942/32825
ISSN: 0013-4686
e-ISSN: 1873-3859
DOI: 10.1016/j.electacta.2020.136993
ISI #: WOS:000576817300013
Rights: (C) 2020 Elsevier Ltd. All rights reserved.
Category: A1
Type: Journal Contribution
Validations: ecoom 2021
Appears in Collections:Research publications

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