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- W2890247233 endingPage "21783" @default.
- W2890247233 startingPage "21770" @default.
- W2890247233 abstract "In Li/S and Mg/S batteries, the charge and discharge of the sulfur cathode proceeds through a cascade of bivalent Sx2– and radical Sy•– polysulfide intermediates. The presence of Li+ or Mg2+ cations in the electrolyte determines the type of intermediates and the overpotentials of their formation in a different manner. Based on systematic cyclic voltammetry (CV) and UV/vis investigations, this work reveals how the mutual interplay of the different cations, the electrolyte solvent, and the polysulfide anions is reflected in the electrochemical behavior of “Li2S8”/LiTFSI and “MgS8”/MgTFSI2 solutions with dimethyl sulfoxide, dimethylformamide, acetonitrile, dimethoxyethane, tetraethylene glycol dimethyl ether, or tetrahydrofuran as solvent. It was observed that the disproportionation reactions of the polysulfides are generally more pronounced and especially the S3•– radical is less stabilized in Mg2+ than in Li+ containing solutions. In contrast to their Li counterparts, the formation of S42– polysulfides during the reduction of sulfur is not observed in glyme-based Mg polysulfide solutions. Quantum chemical predictions of stability and disproportionation of the Mg/polysulfide/solvent clusters complemented the CV and UV/vis investigations." @default.
- W2890247233 created "2018-09-27" @default.
- W2890247233 creator A5000203192 @default.
- W2890247233 creator A5042561977 @default.
- W2890247233 creator A5047514574 @default.
- W2890247233 creator A5050353892 @default.
- W2890247233 creator A5063946116 @default.
- W2890247233 creator A5083203006 @default.
- W2890247233 creator A5090379939 @default.
- W2890247233 date "2018-09-04" @default.
- W2890247233 modified "2023-10-16" @default.
- W2890247233 title "Cation-Dependent Electrochemistry of Polysulfides in Lithium and Magnesium Electrolyte Solutions" @default.
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