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@ARTICLE{Lunghammer:857920,
      author       = {Lunghammer, S. and Prutsch, D. and Breuer, S. and
                      Rettenwander, D. and Hanzu, I. and Ma, Qianli and Tietz, F.
                      and Wilkening, H. M. R.},
      title        = {{F}ast {N}a ion transport triggered by rapid ion exchange
                      on local length scales},
      journal      = {Scientific reports},
      volume       = {8},
      number       = {1},
      issn         = {2045-2322},
      address      = {[London]},
      publisher    = {Macmillan Publishers Limited, part of Springer Nature},
      reportid     = {FZJ-2018-06874},
      pages        = {11970},
      year         = {2018},
      abstract     = {The realization of green and economically friendly energy
                      storage systems needs materials with outstanding properties.
                      Future batteries based on Na as an abundant element take
                      advantage of non-flammable ceramic electrolytes with very
                      high conductivities. Na3Zr2(SiO4)2PO4-type superionic
                      conductors are expected to pave the way for inherently safe
                      and sustainable all-solid-state batteries. So far, only
                      little information has been extracted from spectroscopic
                      measurements to clarify the origins of fast ionic hopping on
                      the atomic length scale. Here we combined broadband
                      conductivity spectroscopy and nuclear magnetic resonance
                      (NMR) relaxation to study Na ion dynamics from the µm to
                      the angstrom length scale. Spin-lattice relaxation NMR
                      revealed a very fast Na ion exchange process in
                      Na3.4Sc0.4Zr1.6(SiO4)2PO4 that is characterized by an
                      unprecedentedly high self-diffusion coefficient of 9 ×
                      10−12 m2s−1 at −10 °C. Thus, well below ambient
                      temperature the Na ions have access to elementary diffusion
                      processes with a mean residence time τNMR of only 2 ns.
                      The underlying asymmetric diffusion-induced NMR rate peak
                      and the corresponding conductivity isotherms measured in the
                      MHz range reveal correlated ionic motion. Obviously, local
                      but extremely rapid Na+ jumps, involving especially the
                      transition sites in Sc-NZSP, trigger long-range ion
                      transport and push ionic conductivity up to 2 mS/cm at room
                      temperature.},
      cin          = {IEK-12 / IEK-1},
      ddc          = {600},
      cid          = {I:(DE-Juel1)IEK-12-20141217 / I:(DE-Juel1)IEK-1-20101013},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30097645},
      UT           = {WOS:000441300700014},
      doi          = {10.1038/s41598-018-30478-7},
      url          = {https://juser.fz-juelich.de/record/857920},
}