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@ARTICLE{Adhitama:909607,
      author       = {Adhitama, Egy and van Wickeren, Stefan and Neuhaus, Kerstin
                      and Frankenstein, Lars and Demelash, Feleke and Javed, Atif
                      and Haneke, Lukas and Nowak, Sascha and Winter, Martin and
                      Gomez-Martin, Aurora and Placke, Tobias},
      title        = {{R}evealing the {R}ole, {M}echanism, and {I}mpact of
                      {A}l{F} 3 {C}oatings on the {I}nterphase of {S}ilicon {T}hin
                      {F}ilm {A}nodes},
      journal      = {Advanced energy materials},
      volume       = {12},
      number       = {41},
      issn         = {1614-6832},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2022-03279},
      pages        = {2201859},
      year         = {2022},
      abstract     = {Silicon (Si) holds great promise as an anode material for
                      high energy density lithium ion batteries owing to its
                      theoretical capacity of up to 3579 mAh g−1. However, this
                      potential comes at the expense of major challenges, because
                      the solid electrolyte interphase (SEI) at Si anodes hardly
                      provides long-term protection due to severe volume
                      expansion. Yet, when it comes to the SEI, the formation
                      mechanism is not thoroughly understood. Here, thin AlF3
                      coatings are deposited on Si thin film to stabilize the SEI.
                      To evaluate the SEI, system-atic observation utilizing X-ray
                      photoelectron spectroscopy is performed at different
                      (de-)lithiation states, allowing stage-by-stage analysis to
                      reveal the role, mechanism, and impact of AlF3 coating.
                      Results show that the capacity retention is significantly
                      improved for $90\%$ after 100 cycles. The transforma-tion of
                      AlF3 into Li-Al-F compounds, as confirmed by ion
                      chromatography, is responsible for an enhanced performance
                      due to its high ionic conductivity. Moreover, the SEI of
                      coated Si thin films is rich in inorganic species (i.e.,
                      LiF) which is beneficial to prevent electrons to pass
                      through. This work will deepen the understanding of SEI on
                      Si anodes with respect to the coating approach, suggesting
                      future directions to improve coating layers on Si},
      cin          = {IEK-12},
      ddc          = {050},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1222 - Components and Cells (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1222},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000844800700001},
      doi          = {10.1002/aenm.202201859},
      url          = {https://juser.fz-juelich.de/record/909607},
}