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@ARTICLE{Tsai:205134,
      author       = {Tsai, Chih-Long and Dashjav, Enkhtsetseg and Hammer,
                      Eva-Maria and Finsterbusch, Martin and Tietz, Frank and
                      Uhlenbruck, Sven and Buchkremer, Hans Peter},
      title        = {{H}igh conductivity of mixed phase {A}l-substituted
                      {L}i$_{7}${L}a$_{3}${Z}r$_{2}${O}$_{12}$},
      journal      = {Journal of electroceramics},
      volume       = {35},
      number       = {1-4},
      issn         = {1385-3449},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2015-05599},
      pages        = {25-32},
      year         = {2015},
      abstract     = {Al-substituted Li7La3Zr2O12 (LLZ:Al) was synthesized via
                      conventional solid state reaction. Different dwell times at
                      sintering temperature of 1200 °C led to a varying Li
                      content in LLZ:Al which significantly affected the Li-ion
                      conductivity. Electrochemical impedance spectroscopy and
                      X-ray diffraction were used to characterize the sintered
                      pellets which showed a maximum total ionic conductivity of
                      ~3 × 10−4 S cm−1 at room temperature although the
                      samples were composed of cubic and tetragonal LLZ:Al, with
                      the tetragonal phase as its major phase. Inductively coupled
                      plasma optical emission spectroscopy revealed that the Li
                      content steadily decreased from 7.5 to 6.5 Li per formula
                      unit with increasing sintering time. The highest
                      conductivity was observed from the sample with the lowest Li
                      concentration at 6.5 per formula unit. Scanning electron
                      microscopy images revealed the formation of large grains,
                      about 500 μm in diameter, which additionally could be the
                      reason for achieving high total Li-ion conductivity.
                      Electrochemical tests showed that mixed phase LLZ:Al is
                      stable against metallic Li up to 8 V.},
      cin          = {IEK-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000366155900004},
      doi          = {10.1007/s10832-015-9988-7},
      url          = {https://juser.fz-juelich.de/record/205134},
}