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@ARTICLE{Ma:863239,
      author       = {Ma, Qianli and Tsai, Chih-Long and Wei, Xian-Kui and
                      Heggen, Marc and Tietz, Frank and Irvine, John T. S.},
      title        = {{R}oom temperature demonstration of a sodium superionic
                      conductor with grain conductivity in excess of 0.01 {S} cm
                      −1 and its primary applications in symmetric battery
                      cells},
      journal      = {Journal of materials chemistry / A Materials for energy and
                      sustainability A},
      volume       = {7},
      number       = {13},
      issn         = {2050-7496},
      address      = {London ˜[u.a.]œ},
      publisher    = {RSC},
      reportid     = {FZJ-2019-03329},
      pages        = {7766 - 7776},
      year         = {2019},
      abstract     = {The lack of suitable candidate electrolyte materials for
                      practical application limits the development of
                      all-solid-state Na-ion batteries. Na3+xZr2Si2+xP1−xO12 was
                      the very first series of NASICONs discovered some 40 years
                      ago; however, separation of bulk conductivity from total
                      conductivity at room temperature is still problematic. It
                      has been suggested that the effective Na-ion conductivity is
                      ∼10−4 S cm−1 at room temperature for
                      Na3+xZr2Si2+xP1−xO12 ceramics; however using a
                      solution-assisted solid-state reaction for preparation of
                      Na3+xZr2Si2+xP1−xO12, a total conductivity of 5 × 10−3
                      S cm−1 was achieved for Na3.4Zr2Si2.4P0.6O12 at 25 °C,
                      higher than the values previously reported for
                      polycrystalline Na-ion conductors. A bulk conductivity of
                      1.5 × 10−2 S cm−1 was revealed by high frequency
                      impedance spectroscopy (up to 3 GHz) and verified by low
                      temperature impedance spectroscopy (down to −100 °C) for
                      Na3.4Zr2Si2.4P0.6O12 at 25 °C, indicating further the
                      potential of increasing the related total conductivity. A
                      Na/Na3.4Zr2Si2.4P0.6O12/Na symmetric cell showed low
                      interface resistance and high cycling stability at room
                      temperature. A full-ceramic cell was fabricated and tested
                      at 28 °C with good cycling performance.},
      cin          = {IEK-1},
      ddc          = {530},
      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:000463819400048},
      doi          = {10.1039/C9TA00048H},
      url          = {https://juser.fz-juelich.de/record/863239},
}