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@ARTICLE{Faka:1016706,
      author       = {Faka, Vasiliki and Agne, Matthias and Till, Paul and
                      Bernges, Tim and Sadowski, Marcel and Gautam, Ajay and Albe,
                      Karsten and Zeier, Wolfgang},
      title        = {{P}ressure {D}ependence of {I}onic {C}onductivity in {S}ite
                      {D}isordered {L}ithium {S}uperionic {A}rgyrodite
                      ${L}i_6{PS}_5{B}r$},
      journal      = {Energy advances},
      volume       = {2},
      number       = {11},
      issn         = {2753-1457},
      address      = {Beijing},
      publisher    = {Royal Society of Chemistry},
      reportid     = {FZJ-2023-03706},
      pages        = {1915-1925},
      year         = {2023},
      note         = {Alexander von Humboldt-Stiftung, DFG(ZE 1010/12-1),
                      BMBF(03XP0435C), BMBF(p0020377)},
      abstract     = {The understanding of transport in Li+ solid ionic
                      conductors is critical for the development of solid-state
                      batteries. The influence of activation volumes on ion
                      transport in solid electrolytes has recently garnered
                      renewed research interest, due to the need to control the
                      ion dynamics that influence the ionic conductivity in solid
                      electrolytes. Microscopic activation volumes are believed to
                      correspond to the volume change in the atomic structure of a
                      material that occurs during an ion jump and can be
                      determined thermodynamically from pressure dependent
                      conductivity measurements. However, it remains unknown if
                      and how this external pressure can affect the structure and
                      transport properties of Li+ solid electrolytes. The lithium
                      argyrodites Li6PS5Br have shown high ionic conductivities,
                      influenced by their Br−/S2− site disorder, which is
                      associated with more spatially diffuse lithium-ion
                      distributions. Herein, impedance spectra were acquired over
                      a pressure range of 0.1 GPa to 1.5 GPa and revealed the
                      activation volumes for Li+ migration. Specifically,
                      activation volumes for Li+ migration increase with
                      increasing degrees of Br−/S2− site disorder in Li6PS5Br
                      and with more spatially distributed lithium-ions.
                      Furthermore, estimations of the corresponding migration
                      volumes, which are thought to be a constant of the diffusing
                      mobile ion in the structure are here found to change
                      significantly among different Br−/S2− site disorders.
                      These observations motivate further investigations on how
                      the thermodynamic activation volume in superionic Li+
                      conductors may provide novel insights to the influences of
                      structure on ion transport in fast ionic conductors.},
      cin          = {IEK-12},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001102672200001},
      doi          = {10.1039/D3YA00424D},
      url          = {https://juser.fz-juelich.de/record/1016706},
}