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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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ShafiqueA_2020.pdf Restricted Access | Published version | 3.21 MB | Adobe PDF | View/Open Request a copy |
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