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@ARTICLE{Yan:864390,
      author       = {Yan, Gang and Yu, Shicheng and Yang, Weiguang and Xiaqiang,
                      Li and Tempel, Hermann and Kungl, Hans and Eichel,
                      Rüdiger-A. and Krüger, Manja and Malzbender, Jürgen},
      title        = {{A}nisotropy of the mechanical properties of
                      {L}i1·3{A}l0·3{T}i1·7({PO}4)3 solid electrolyte material},
      journal      = {Journal of power sources},
      volume       = {437},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-04182},
      pages        = {226940 -},
      year         = {2019},
      abstract     = {Solid state lithium ion batteries have high potential for
                      future energy storage since they promise high energy density
                      and safety, latter being related to the mechanical
                      properties of the materials. For example the micro-battery,
                      being one application of the solid state batteries, requires
                      a thin solid electrolyte, which renders especially
                      anisotropic behavior of the materials’ properties
                      important. In particular, Li1+xAlxTi2-x (PO4)3 (LATP) is a
                      promising solid electrolyte material that possesses a
                      rhombohedral crystal structure that might lead to such
                      anisotropic mechanical properties. In current work a
                      nanoindentation test is combined with EBSD technique to
                      correlate elastic modulus and hardness of LATP to the
                      crystal orientation. Furthermore, calculations based on the
                      Vlassak-Nix and easy-slip models are adopted to verify the
                      anisotropic mechanical properties. Overall, the
                      experimentally derived elastic modulus and hardness of LATP
                      show similar trends. The experimentally derived indentation
                      modulus agrees well with the prediction of the Vlassak-Nix
                      model. The normalization of the experimentally derived
                      hardness and the hardness ratio from the easy-slip model
                      reveal comparable trends. This work aids a deepening of the
                      understanding of the mechanical properties of LATP
                      electrolyte and provides a basis for further improvement of
                      the Vlassak-Nix and easy-slip models in the application to
                      rhombohedral materials.},
      cin          = {IEK-2 / IEK-9},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)IEK-9-20110218},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000486355400009},
      doi          = {10.1016/j.jpowsour.2019.226940},
      url          = {https://juser.fz-juelich.de/record/864390},
}