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@ARTICLE{Bieker:857743,
      author       = {Bieker, Georg and Diddens, Diddo and Kolek, Martin and
                      Borodin, Oleg and Winter, Martin and Bieker, Peter and
                      Jalkanen, Kirsi},
      title        = {{C}ation-{D}ependent {E}lectrochemistry of {P}olysulfides
                      in {L}ithium and {M}agnesium {E}lectrolyte {S}olutions},
      journal      = {The journal of physical chemistry / C C, Nanomaterials and
                      interfaces},
      volume       = {122},
      number       = {38},
      issn         = {1932-7455},
      address      = {Washington, DC},
      publisher    = {Soc.66306},
      reportid     = {FZJ-2018-06711},
      pages        = {21770 - 21783},
      year         = {2018},
      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.},
      cin          = {IEK-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000446141900009},
      doi          = {10.1021/acs.jpcc.8b06560},
      url          = {https://juser.fz-juelich.de/record/857743},
}