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@ARTICLE{Heidrich:906960,
      author       = {Heidrich, Bastian and Pritzlaff, Lars and Börner, Markus
                      and Winter, Martin and Niehoff, Philip},
      title        = {{C}omparative {X}-ray {P}hotoelectron {S}pectroscopy
                      {S}tudy of the {SEI} and {CEI} in {T}hree {D}ifferent
                      {L}ithium {I}on {C}ell {F}ormats},
      journal      = {Journal of the Electrochemical Society},
      volume       = {169},
      number       = {3},
      issn         = {0013-4651},
      address      = {Bristol},
      publisher    = {IOP Publishing},
      reportid     = {FZJ-2022-01778},
      pages        = {030533 -},
      year         = {2022},
      abstract     = {The solid electrolyte interphase (SEI) and cathode
                      electrolyte interphase (CEI) of three lithium ion cell
                      formats, i.e., coin, lab-scale pouch and multi-layer pouch,
                      are compared. Half the cells are additionally dried prior to
                      electrolyte filling and cycling. The highest water content
                      per cell, determined by Karl Fischer titration, is found for
                      lab-scale pouch cells due to their disadvantageous ratio of
                      cell housing area to electrode area. The water content
                      influences the performance during electrochemical formation
                      as well as the impedance. This is linked to increasing
                      lithium fluoride concentration, as determined by X-ray
                      photoelectron spectroscopy. For dried cells, this is not the
                      case because there is less conducting salt hydrolysis. The
                      CEI thickness decreases for dried pouch cells, while the
                      organic SEI thickness increases in all cell formats for
                      dried cells. It is concluded that the initial thickness of
                      the porous organic SEI depends on the insulation of the
                      dense inorganic SEI close to the electrode surface. Organic
                      species are more likely to contribute to negative electrode
                      passivation when the extent of conducting salt hydrolysis is
                      low. For coin cells, the presence of atmospheric gases
                      during formation results in thicker SEI and CEI, no matter
                      whether cells are additionally dried.},
      cin          = {IEK-12},
      ddc          = {660},
      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:000770136300001},
      doi          = {10.1149/1945-7111/ac5c08},
      url          = {https://juser.fz-juelich.de/record/906960},
}