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@ARTICLE{Klein:890327,
      author       = {Klein, Sven and van Wickeren, Stefan and Röser, Stephan
                      and Bärmann, Peer and Borzutzki, Kristina and Heidrich,
                      Bastian and Börner, Markus and Winter, Martin and Placke,
                      Tobias and Kasnatscheew, Johannes},
      title        = {{U}nderstanding the {O}utstanding {H}igh‐{V}oltage
                      {P}erformance of {NCM}523||{G}raphite {L}ithium {I}on
                      {C}ells after {E}limination of {E}thylene {C}arbonate
                      {S}olvent from {C}onventional {E}lectrolyte},
      journal      = {Advanced energy materials},
      volume       = {11},
      number       = {14},
      issn         = {1614-6840},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-00893},
      pages        = {2003738},
      year         = {2021},
      abstract     = {The increase of specific energy of current Li ion batteries
                      via further increase of the cell voltage, for example, to
                      4.5 V is typically accompanied by a sudden and rapid
                      capacity fade, known as “rollover” failure. This failure
                      is the result of Li dendrite formation triggered in the
                      course of electrode cross‐talk, that is, dissolution of
                      transition metals (TMs) from the cathode and deposition on
                      the anode. It is shown herein, that the elimination of
                      ethylene carbonate (EC) from a state‐of‐the‐art
                      electrolyte, that is, from 1.0 m LiPF6 in a 3:7 mixture of
                      EC and ethyl methyl carbonate prevents this failure in
                      high‐voltage LiNi0.5Co0.2Mn0.3O2||graphite cells, even
                      without any electrolyte additives. While the oxidative
                      stability on the cathode side is similar in both
                      electrolytes, visible by a decomposition plateau at 5.5 V
                      versus Li|Li+ during charge, the anode side in the EC‐free
                      electrolyte reveals significantly less TM deposits and Li
                      metal dendrites compared to the EC‐based electrolyte. The
                      beneficial effect of EC‐free electrolytes is related to a
                      significantly increased amount of degraded LiPF6 species,
                      which effectively trap dissolved TMs and suppress the effect
                      of detrimental cross‐talk, finally realizing
                      rollover‐free performance under high voltage conditions.},
      cin          = {IEK-12},
      ddc          = {050},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {122 - Elektrochemische Energiespeicherung (POF4-122)},
      pid          = {G:(DE-HGF)POF4-122},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000612637200001},
      doi          = {10.1002/aenm.202003738},
      url          = {https://juser.fz-juelich.de/record/890327},
}