% 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”.

@INPROCEEDINGS{Lobe:860155,
      author       = {Lobe, Sandra and Dellen, Christian and Windmüller, Anna
                      and Tsai, Chih-Long and Möller, Sören and Sohn, Yoo Jung
                      and Sebold, Doris and Finsterbusch, Martin and
                      Fattakhova-Rohlfing, Dina and Uhlenbruck, Sven and Guillon,
                      Olivier},
      title        = {{T}hin film electrolytes for all-solid-state lithium
                      batteries by sputter deposition},
      reportid     = {FZJ-2019-00941},
      year         = {2018},
      abstract     = {Current battery research and development is focused on
                      cells with high energy density as well as high inherent
                      safety. One approach to reach both goals at the same time is
                      a battery concept including a mixed cathode, a solid-state
                      thin film electrolyte and a lithium metal anode.
                      Lithium-stuffed garnets, like Li7La3Zr2O12 (LLZ), are
                      promising electrolyte materials due to their high ionic
                      conductivity and chemical and electrochemical stability with
                      Lithium and common cathode materials, e.g. LiCoO2. However,
                      the co-sintering of garnets with cathode material is impeded
                      by the low thermal stability of these mixtures (e.g. <700°C
                      for LiCoO2, <600°C for 5 V lithium manganese based
                      spinels). Well-defined interfaces can be obtained, when the
                      electrolyte is processed via gas phase at significant lower
                      temperatures than in co-sintering processes. In a previous
                      study we showed that single-phase LLZ thin films with a
                      Li-ion conductivity of 1.2x10-4 S cm-1 can be formed by a
                      sputter deposition process at 700°C. However, this
                      deposition temperature leads to interphase formation with
                      the used substrate material.In order to avoid detrimental
                      diffusion and reaction during deposition, our approach
                      concentrates on the reduction of substrate temperature by
                      careful adjustment of the process parameters. Furthermore,
                      the microstructure of the thin films has to be optimized, so
                      that the Li-ion conductivity can be maximized. Therefore,
                      post-annealing in different atmospheres was applied, too. As
                      a major result we will show the deposition of
                      garnet-structured thin films at around 400°C. The
                      integration of garnet electrolytes in all-solid-state
                      lithium batteries is facilitated by this low deposition
                      temperature. That means, even electrodes, that show a low
                      thermal stability, like e.g. high-voltage spinel materials,
                      could be used as substrate for deposition of garnet
                      electrolytes.},
      month         = {Jan},
      date          = {2018-01-24},
      organization  = {Batterieforum Deutschland, Berlin
                       (Germany), 24 Jan 2018 - 26 Jan 2018},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/860155},
}