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@INPROCEEDINGS{Guin:150440,
      author       = {Guin, Marie and Tietz, Frank and Buchkremer, Hans Peter},
      title        = {{R}eview of physical properties of {NASICON} materials for
                      use in sodium batteries},
      reportid     = {FZJ-2014-00496},
      year         = {2014},
      abstract     = {The environmental concerns about the use of fossil fuels
                      and their resource constraints have led to a great interest
                      in renewable energy sources and new electrical energy
                      storage systems. One promising solution is the
                      electrochemical storage of electricity in batteries. Among
                      all rechargeable battery technologies, the Li-ion cells
                      offer the largest energy density and output voltage. But
                      recently, Na-ion batteries are back in the focus of interest
                      due to the abundant availability of Na instead of the
                      limited resources of Li. However, much work has to be done
                      in the field of Na-ion in order to catch up with Li-ion
                      technology. NASICON materials (sodium super ionic
                      conductors) are a thoroughly-studied class of solid
                      electrolytes for Na-ion batteries. In this study, their
                      structure, compositional diversity and ionic conductivity
                      are reviewed in order to correlate the lattice parameters
                      and specific crystal structure data with the sodium mobility
                      and the activation energy. For approximately 150 structures
                      with the general formula Na1+x+yMxM’2-xSiyP3-yO12 (M and
                      M’ di-, tri-, tetra- or pentavalent cations) an optimal
                      size for M and M’ could be found and the impact on the
                      conductivity of the amount of Na per formula unit could be
                      pointed out. This understanding will be useful for the
                      search of new and improved NASICON materials. An extensive
                      study of the size of the structural bottleneck for the
                      sodium conduction (formed by triangles of oxygen ions) has
                      been made to validate the influence of this geometrical
                      parameter on the sodium mobility.},
      month         = {Mar},
      date          = {2014-03-25},
      organization  = {Fachtagung Kraftwerk Batterie 2014,
                       Münster (Germany), 25 Mar 2014 - 26
                       Mar 2014},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {435 - Energy Storage (POF2-435) / HITEC - Helmholtz
                      Interdisciplinary Doctoral Training in Energy and Climate
                      Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF2-435 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)1},
      url          = {https://juser.fz-juelich.de/record/150440},
}