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@INPROCEEDINGS{Ma:863622,
      author       = {Ma, Qianli and Tsai, Chih-Long and Tietz, Frank and
                      Guillon, Olivier},
      title        = {{T}he re-discovery of {NASICON} materials},
      reportid     = {FZJ-2019-03634},
      year         = {2019},
      abstract     = {Despite of huge efforts, the lack of suitable candidate for
                      electrolytes still impedes the development of
                      all-solid-state Na batteries. Na3+xZr2Si2+xP1-xO12 (-0.2 ≤
                      x ≤ 0.2) are the very first composition series of NASICONs
                      discovered 40 years ago and were reported having a total
                      Na-ion conductivity of ~10-4 S cm-1 at room temperature. In
                      the present study, this composition series is reconsidered
                      and the focusing range of stoichiometry has been varied from
                      x = 0 to x = 0.6. A solution-assisted solid-state reaction
                      method is applied for powder preparation. Surprisingly, a
                      total conductivity of over 5 × 10-3 S cm-1 is achieved for
                      Na3.4Zr2Si2.4P0.6O12 at 25 °C, which is the best value of
                      all reported polycrystalline Na-ion conductors. A bulk
                      conductivity of about 1.5 × 10-2 S cm-1 is also revealed by
                      high frequency impedance spectroscopy up to 3 GHz for
                      Na3.4Zr2Si2.4P0.6O12 at 25 °C. The parameters influencing
                      the total conductivity are discussed in detail. Benefitted
                      from the superior total conductivity of
                      Na3.4Zr2Si2.4P0.6O12, a full-ceramic cell has been
                      fabricated and tested at 28 °C with good cycling
                      performance. To our knowledge, this is the first full
                      ceramic Na-ion battery which has been operated at room
                      temperature.},
      month         = {May},
      date          = {2019-05-25},
      organization  = {The 11th International Conference on
                       High-Performance Ceramics, Kunming
                       (China), 25 May 2019 - 29 May 2019},
      subtyp        = {Invited},
      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)6},
      url          = {https://juser.fz-juelich.de/record/863622},
}