Defect Control in the Synthesis of 2 D MoS 2 Nanosheets: Polysulfide Trapping in Composite Sulfur Cathodes for Li-S Batteries.

Autor: Abraham A; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA., Wang L; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA., Quilty CD; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA., Lutz DM; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA., McCarthy AH; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA., Tang CR; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA., Dunkin MR; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA., Housel LM; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA., Takeuchi ES; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA.; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.; Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, NY, 11973, USA., Marschilok AC; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA.; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.; Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, NY, 11973, USA., Takeuchi KJ; Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA.; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2020 Mar 20; Vol. 13 (6), pp. 1517-1528. Date of Electronic Publication: 2019 Dec 19.
DOI: 10.1002/cssc.201903028
Abstrakt: One of the inherent challenges with Li-S batteries is polysulfide dissolution, in which soluble polysulfide species can contribute to the active material loss from the cathode and undergo shuttling reactions inhibiting the ability to effectively charge the battery. Prior theoretical studies have proposed the possible benefit of defective 2 D MoS 2 materials as polysulfide trapping agents. Herein the synthesis and thorough characterization of hydrothermally prepared MoS 2 nanosheets that vary in layer number, morphology, lateral size, and defect content are reported. The materials were incorporated into composite sulfur-based cathodes and studied in Li-S batteries with environmentally benign ether-based electrolytes. Through directed synthesis of the MoS 2 additive, the relationship between synthetically induced defects in 2 D MoS 2 materials and resultant electrochemistry was elucidated and described.
(© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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