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@ARTICLE{Kaus:834095,
      author       = {Kaus, Maximilian and Guin, Marie and Yavuz, Murat and
                      Knapp, Michael and Tietz, Frank and Guillon, Olivier and
                      Ehrenberg, Helmut and Indris, Sylvio},
      title        = {{F}ast {N}a+ {I}on {C}onduction in {NASICON}-{T}ype
                      {N}a3.4{S}c2({S}i{O}4)0.4({PO}4 )2.6 {O}bserved by 23{N}a
                      {NMR} {R}elaxometry},
      journal      = {The journal of physical chemistry / C},
      volume       = {121},
      number       = {3},
      issn         = {1932-7447},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2017-04096},
      pages        = {1449 - 1454},
      year         = {2017},
      abstract     = {The bulk diffusion of Na in Na3.4Sc2(SiO4)0.4(PO4)2.6 was
                      investigated by 23Na NMR relaxometry in the temperature
                      range from 250 to 670 K. These measurements reveal fast Na
                      diffusion with hopping rates of 3 × 108 s–1 for the Na+
                      ions at 350 K and activation barriers for single Na+ ion
                      jumps of (0.20 ± 0.01) eV. From these values a diffusion
                      coefficient of D = 6.4 × 10–12 m2/s and a Na ion
                      conductivity of σNa = 4 mS/cm (both at 350 K) can be
                      estimated. Measurements on two samples, one stored in air
                      and one stored in Ar, do not show significant differences,
                      which reveals that these NMR measurements are probing the
                      bulk diffusion while conductivity measurements usually are
                      also influenced by grain boundaries that can be affected by
                      the moisture level during storage.},
      cin          = {IEK-12 / IEK-1 / JARA-ENERGY},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217 / I:(DE-Juel1)IEK-1-20101013 /
                      $I:(DE-82)080011_20140620$},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000393008900009},
      doi          = {10.1021/acs.jpcc.6b10523},
      url          = {https://juser.fz-juelich.de/record/834095},
}