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@PHDTHESIS{Yan:878123,
      author       = {Yan, Gang},
      title        = {{M}echanical {B}ehavior of {S}olid {E}lectrolyte
                      {M}aterials for {L}ithium-ion {B}atteries},
      volume       = {500},
      school       = {RWTH Aachen},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2020-02641},
      isbn         = {978-3-95806-484-3},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {x, 139 S.},
      year         = {2020},
      note         = {RWTH Aachen, Diss., 2020},
      abstract     = {All solid-state lithium-ion batteries (ASSLIBs) being based
                      on solid state electrolytes are at present regarded as a
                      promising alternative for conventional batteries on account
                      of their higher ionic conductivity, energy density as well
                      as higher chemical stability and safety. The solid
                      electrolytes are expected to possess enhanced ionic
                      conductivity and in addition a mechanical stability that
                      warrants a safer separation of electrodes and is envisaged
                      to permit them to withstand long-term cycling operation.
                      However, in contrast to the widely investigated
                      electro-chemical properties of solid electrolytes, the
                      mechanical properties, which are important for long-term
                      reliability, need to be studied deeper. Hence, the main aim
                      of this work is the mechanical characterization of
                      respective ceramic materials as candidates for solid
                      electrolytes and the relationship to materials’
                      microstructures. For this purpose three types of solid
                      electrolytes, NASICON type
                      Li$_{1+x}$Al$_{x}$Ti$_{2-x}$(PO$_{4)3}$ (LATP), garnet type
                      Li$_{7}$La$_{3}$Zr$_{2}$O$_{12}$ (LLZO), perovskite type
                      Li$_{0.350}$La$_{0.557}$TiO$_{3}$ (LLTO), were chosen due to
                      their previously verified promising electro-chemical
                      properties. With the aim of understanding the mechanical
                      properties of the LATP material, LATPs sintered at different
                      temperatures (950 –1100 °C) were characterized via
                      indentation method in this work. The results revealed that
                      LATP sintered at higher temperature possesses higher elastic
                      modulus, hardness and fracture toughness. The anisotropy of
                      the mechanical properties of the solid electrolyte material
                      LATP sintered at 1100 °C was investigated in this work via
                      indentation mapping test in a depth control mode at room
                      temperature with associated EBSD characterization. The
                      experimentally derived elastic modulus and hardness of LATP
                      show similar trends, i.e. that the rotation angle between
                      two prismatic type planes had no detectable influence,
                      whereas when the rotation angle from basal plane to
                      prismatic plane increased, elastic modulus and hardness
                      value decrease conspicuously. Furthermore, to assess the
                      fracture reliability of electrolytes,
                      Li$_{1.5}$Al$_{0.5}$Ti$_{1.5}$P$_{3}$O$_{12}$ mixed with
                      SiO$_{2}$ (LATP:Si) and a LLZO material were selected to
                      investigate the macroscopic mechanical properties,
                      concentrating on fracture strength and Weibull modulus. The
                      Weibull moduli of LATP:Si and LLZO are in a similar range as
                      for other ceramic materials, whereas the fractur [...]},
      cin          = {IEK-2},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2020081204},
      url          = {https://juser.fz-juelich.de/record/878123},
}