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@ARTICLE{Makvandi:1009620,
      author       = {Makvandi, Ardavan and Lobe, Sandra and Wolff, Michael and
                      Peterlechner, Martin and Gammer, Christoph and Hamedi
                      Jouybari, Yaser and Uhlenbruck, Sven and Wilde, Gerhard},
      title        = {{A}l-doped {Z}n{O}-coated {L}i{C}o{O}2 thin-film electrode:
                      {U}nderstanding the impact of a coating layer on the
                      degradation mechanism},
      journal      = {Journal of power sources},
      volume       = {580},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2023-02924},
      pages        = {233451 -},
      year         = {2023},
      abstract     = {Despite the high theoretical capacity of LiCoO2 electrode,
                      only half of it can be used in commercial cells due to
                      chemical and structural instabilities of the electrode
                      surface at high charge cut-off voltages. Surface
                      modifications by coating layers are among the best
                      approaches used to mitigate the surface degradation. Here, a
                      systematic study of degradation mechanism of uncoated
                      polycrystalline LiCoO2 thin-film electrodes and of the
                      suppression mechanisms induced by an Al-doped ZnO (Al:ZnO)
                      coating layer during electrochemical cycling was performed,
                      using analytical transmission electron microscopy (TEM). The
                      Al:ZnO coating layer was deposited onto the LiCoO2 electrode
                      surface using a wet-chemical dip-coating process. The
                      coating layer increased the first discharge capacity and
                      improved capacity retention. In the case of uncoated LiCoO2
                      electrode after 40 cycles, an irreversible phase transition
                      from a layered to a spinel phase occurred at the electrode
                      surface due to a direct electrolyte exposure. Moreover, Li
                      and oxygen losses as well as a reduction of the oxidation
                      state of Co ions occurred at the electrode surface. In the
                      case of an Al:ZnO - coated LiCoO2 electrode, the coating
                      layer significantly mitigated the chemical and structural
                      degradation of the electrode surface and, thereby,
                      suppressed the capacity and voltage fading.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {1221 - Fundamentals and Materials (POF4-122) / 1222 -
                      Components and Cells (POF4-122) / Nanobat: Nanostrukturierte
                      Batteriematerialien; Teilvorhaben: Beschichtung von
                      Aktivmaterialien für Elektroden mit hoher Effizienz und
                      Lebensdauer (03ET6104B)},
      pid          = {G:(DE-HGF)POF4-1221 / G:(DE-HGF)POF4-1222 /
                      G:(BMWi)03ET6104B},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001047305200001},
      doi          = {10.1016/j.jpowsour.2023.233451},
      url          = {https://juser.fz-juelich.de/record/1009620},
}