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@INPROCEEDINGS{Odenwald:885969,
      author       = {Odenwald, Philipp and Bauer, Alexander and Tsai, Chih-Long
                      and Uhlenbruck, Sven and Fattakhova-Rohlfing, Dina and
                      Guillon, Olivier},
      title        = {{S}uperior sintering behavior and ionic conductivity:
                      {F}acile coating methods for improved electrolyte materials},
      reportid     = {FZJ-2020-04200},
      year         = {2020},
      abstract     = {Objective:Solid-state batteries are intensively
                      investigated as a disruptive energy storage technology.
                      Oxide and phosphate-based Li-ion conductors such as
                      Li1.5Al0.5Ti1.5(PO4)3 (LATP) and
                      Li6.45La3Zr1.6Ta0.4Al0.05O12 (LLZ) show properties like
                      improved safety and electrochemical stability compared to
                      incumbent Li-ion battery technologies, but also require
                      treatment at elevated temperatures. We present advanced
                      processing methods for these ceramic electrolyte materials.
                      By applying various surface coatings on electrolyte
                      particles and electrode-electrolyte interfaces we improved
                      the sintering behavior and the electrode
                      compatibility.Methods:LATP solid electrolyte powder was
                      prepared by solution-assisted solid-state-reaction (SASSR),
                      whereas LLZ was prepared via a solid state reaction.
                      Sintering additives were dispersed along with the
                      oxide-based electrolyte powder to perform screening tests.
                      Further, wet coating methods employing organometallic
                      precursors were developed for powders and planar substrates.
                      The resulting solid electrolyte materials were characterized
                      by X-ray diffraction (XRD), microscopic imaging and
                      conductivity measurements.Results and discussion:A mixture
                      of Al- and B-alkoxide was used to modify the conventional
                      LATP. Phase-pure LATP was confirmed for pellets of modified
                      and unmodified LATP by XRD, and the relative densities after
                      sintering exceeded 90 $\%$ for both the modified and
                      unmodified powder. Symmetric cells with the modified
                      LATP-electrolyte and sputtered Au-electrodes showed an
                      improved ionic conductivity at room temperature. Trilithium
                      borate and lithium fluoride were identified as the most
                      effective sintering additives among those investigated in
                      conjunction with LLZ, yielding a relative density of 89 $\%$
                      and improved conductivity compared to conventional LLZ.},
      month         = {Jan},
      date          = {2020-01-22},
      organization  = {Batterieforum Deutschland 2020, Berlin
                       (Germany), 22 Jan 2020 - 24 Jan 2020},
      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/885969},
}