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@ARTICLE{Leopold:1044448,
      author       = {Leopold, Maike and Pfeiffer, Felix and Muschiol, Elisabeth
                      Christine and Wölke, Christian and Yan, Peng and Brüning,
                      Kai and Nowak, Sascha and Esselen, Melanie and Winter,
                      Martin and Cekic-Laskovic, Isidora},
      title        = {{I}mportance of {F}luorine in {H}igh {V}oltage
                      {E}lectrolytes for {LNMO}||{S}i{G}r {C}ell {C}hemistry},
      journal      = {Small},
      volume       = {21},
      number       = {35},
      issn         = {1613-6810},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2025-03202},
      pages        = {2505254},
      year         = {2025},
      abstract     = {Lithium nickel manganese oxide (LNMO) and silicon/graphite
                      (SiGr) are promising active materials for high voltage
                      lithium ion batteries attributed to the high operating
                      potential versus Li|Li+ of LNMO and the high specific
                      discharge capacity of silicon. However, this cell chemistry
                      exhibits rapid capacity fading, primarily attributed to
                      electrolyte decomposition at the high operating voltage of
                      4.9 V. Here, a fluorinated electrolyte containing lithium
                      hexafluorophosphate as conducting salt, as well as
                      fluoroethylene carbonate and methyl (2,2,2-trifluoroethyl)
                      carbonate as electrolyte solvents is introduced. The
                      influence of the selected solvents on the interphase
                      formation and galvanostatic cycling performance is analyzed
                      using complementary electrochemical, spectroscopic, and
                      safety-related techniques. The presence of fluorinated
                      solvents enables a high oxidative stability of an
                      electrolyte up to 5.0 V versus Li|Li+ and effective
                      interphase formation. In comparison to cells with
                      non-fluorinated electrolytes, the galvanostatic cycling
                      performance demonstrates a considerable improvement, leading
                      to a doubling of the achievable cycle life. Roll-over
                      failure observed in the electrolyte with non-fluorinated
                      solvents could be effectively suppressed for over 300 cycles
                      and the resulting electrolyte formulation with fluorinated
                      solvents is non-flammable. Additionally, by fine-tuning the
                      electrolyte formulation, the extent of acetylcholinesterase
                      inhibition, an indication of substance toxicity of the aged
                      electrolyte could be reduced.},
      cin          = {IMD-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IMD-4-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {40641267},
      UT           = {WOS:001525540600001},
      doi          = {10.1002/smll.202505254},
      url          = {https://juser.fz-juelich.de/record/1044448},
}