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@ARTICLE{Schn:890792,
      author       = {Schön, Nino and Schierholz, Roland and Jesse, Stephen and
                      Yu, Shicheng and Eichel, Rüdiger-A. and Balke, Nina and
                      Hausen, Florian},
      title        = {{S}ignal {O}rigin of {E}lectrochemical {S}train
                      {M}icroscopy and {L}ink to {L}ocal {C}hemical {D}istribution
                      in {S}olid {S}tate {E}lectrolytes},
      journal      = {Small methods},
      volume       = {5},
      number       = {5},
      issn         = {2366-9608},
      address      = {Weinheim},
      publisher    = {WILEY-VCH Verlag GmbH $\&$ Co. KGaA},
      reportid     = {FZJ-2021-01200},
      pages        = {2001279 -},
      year         = {2021},
      abstract     = {Electrochemical strain microscopy (ESM) is a distinguished
                      method to characterize Li-ion mobility in energy materials
                      with extremely high spatial resolution. The exact origin of
                      the cantilever deflection when the technique is applied on
                      solid state electrolytes (SSEs) is currently discussed in
                      the literature. Understanding local properties and
                      influences on ion mobility in SSEs is of utmost importance
                      to improve such materials for next generation batteries.
                      Here, the exact signal formation process of ESM when applied
                      on sodium super ionic conductor (NASICON)-type SSE
                      containing Na- and Li-ions is investigated. Changes in the
                      dielectric properties, which are linked to the local
                      chemical composition, are found to be responsible for the
                      observed contrast in the deflection of the cantilever
                      instead of a physical volume change as a result of Vegard´s
                      Law. The cantilever response is strongly reduced in areas of
                      high sodium content which is attributed to a reduction of
                      the tip-sample capacitance in comparison to areas with high
                      lithium content. This is the first time a direct link
                      between electrostatic forces in contact mode and local
                      chemical information is demonstrated on SSEs. The results
                      open up new possibilities in information gain since
                      dielectric properties are sensitive to subtle changes in
                      local chemical composition.},
      cin          = {IEK-9},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {122 - Elektrochemische Energiespeicherung (POF4-122) /
                      HITEC - Helmholtz Interdisciplinary Doctoral Training in
                      Energy and Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-122 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000621460900001},
      pubmed       = {pmid:34928092},
      doi          = {10.1002/smtd.202001279},
      url          = {https://juser.fz-juelich.de/record/890792},
}