% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Atik:906974,
      author       = {Atik, Jaschar and Winter, Martin and Paillard, Elie},
      title        = {{L}ocal superconcentration via solvating ionic liquid
                      electrolytes for safe 4.3{V} lithium metal batteries},
      journal      = {Electrochimica acta},
      volume       = {415},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2022-01787},
      pages        = {140181 -},
      year         = {2022},
      abstract     = {A novel solvating ionic liquid (SIL), N-methyl
                      N-oligo(ethylene oxide)pyrrolidinium
                      bis(fluorosulfonyl)imide (Pyr1,(2O)7FSI) was synthesized and
                      used to prepare binary and ternary liquid electrolytes with
                      LiFSI as conducting salt and
                      1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (TTE) as
                      a non-solvating low viscosity co-solvent. Thereby, the
                      binary superconcentrated liquid electrolyte (i.e., 6.8 m
                      LiFSI in Pyr1,(2O)7FSI) reaches a Li+ ion transference
                      number of 0.25 ± 0.02. To enhance the ionic conductivity
                      and separator wetting, the binary electrolyte was mixed with
                      TTE leading to local superconcentrated Li+ ion solvation
                      structures as shown by Raman measurements. These ternary
                      electrolytes exhibit improved wettability, excellent safety
                      and allow cycling in NMC622||Li cells and Cu||Li cells with
                      Coulombic efficiencies of up to $99.9\%$ and $98.5\%,$
                      respectively, and a capacity retention of $84\%$ for
                      NMC622||Li cells with the electrolyte 2.0 m LiFSI,
                      Pyr1,(2O)7FSI:TTE (1:1 $wt\%)$ after 100 cycles vs. a cell
                      failure after 35 cycles for the state-of-the-art containing
                      IL N‑butyl‑N-methylpyrrolidinium FSI electrolyte.},
      cin          = {IEK-12},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000872022700001},
      doi          = {10.1016/j.electacta.2022.140181},
      url          = {https://juser.fz-juelich.de/record/906974},
}