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@ARTICLE{Philipp:888332,
      author       = {Philipp, Martin and Gadermaier, Bernhard and Posch, Patrick
                      and Hanzu, Ilie and Ganschow, Steffen and Meven, Martin and
                      Rettenwander, Daniel and Redhammer, Günther J. and
                      Wilkening, H. Martin R.},
      title        = {{T}he {E}lectronic {C}onductivity of {S}ingle {C}rystalline
                      {G}a‐{S}tabilized {C}ubic
                      {L}i$_7${L}a$_3${Z}r$_2${O}$_{12}$ : {A} {T}echnologically
                      {R}elevant {P}arameter for {A}ll‐{S}olid‐{S}tate
                      {B}atteries},
      journal      = {Advanced materials interfaces},
      volume       = {7},
      number       = {16},
      issn         = {2196-7350},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2020-04851},
      pages        = {2000450 -},
      year         = {2020},
      abstract     = {The next‐generation of all‐solid‐state lithium
                      batteries need ceramic electrolytes with very high ionic
                      conductivities. At the same time a negligible electronic
                      conductivity σeon is required to eliminate self‐discharge
                      in such systems. A non‐negligible electronic conductivity
                      may also promote the unintentional formation of Li
                      dendrites, being currently one of the key issues hindering
                      the development of long‐lasting all‐solid‐state
                      batteries. This interplay is suggested recently for
                      garnet‐type Li7La3Zr2O12 (LLZO). It is, however, well
                      known that the overall macroscopic electronic conductivity
                      may be governed by a range of extrinsic factors such as
                      impurities, chemical inhomogeneities, grain boundaries,
                      morphology, and size effects. Here, advantage of
                      Czochralski‐grown single crystals, which offer the unique
                      opportunity to evaluate intrinsic properties of a chemically
                      homogeneous matrix, is taken to measure the electronic
                      conductivity σeon. Via long‐time, high‐precision
                      potentiostatic polarization experiments an upper limit of
                      σeon in the order of 5 × 10−10 S cm−1 (293 K) is
                      estimated. This value is by six orders of magnitude lower
                      than the corresponding total conductivity σtotal = 10−3 S
                      cm−1 of Ga‐LZO. Thus, it is concluded that the high
                      values of σeon recently reported for similar systems do not
                      necessarily mirror intragrain bulk properties of chemically
                      homogenous systems but may originate from chemically
                      inhomogeneous interfacial areas.},
      cin          = {JCNS-FRM-II / JCNS-2 / MLZ},
      ddc          = {600},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000539609000001},
      doi          = {10.1002/admi.202000450},
      url          = {https://juser.fz-juelich.de/record/888332},
}