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@ARTICLE{Klein:890626,
      author       = {Klein, Sven and Bärmann, Peer and Fromm, Olga and
                      Borzutzki, Kristina and Reiter, Jakub and Fan, Quan and
                      Winter, Martin and Placke, Tobias and Kasnatscheew,
                      Johannes},
      title        = {{P}rospects and limitations of single-crystal cathode
                      materials to overcome cross-talk phenomena in high-voltage
                      lithium ion cells},
      journal      = {Journal of materials chemistry / A},
      volume       = {9},
      number       = {12},
      issn         = {2050-7488},
      address      = {London ˜[u.a.]œ},
      publisher    = {RSC},
      reportid     = {FZJ-2021-01081},
      pages        = {7546-7555},
      year         = {2021},
      abstract     = {The specific energy of lithium ion batteries can be further
                      enhanced by increasing the cell voltage (>4.3 V). However,
                      conventional cathode active materials (CAMs) e.g.
                      LiNi0.5Co0.2Mn0.3O2 (NCM523) with typical poly-crystal
                      (PC)-based secondary particles suffer from rollover failure
                      at 4.5 V, which is shown to be the result of an electrode
                      cross-talk, i.e., dissolution of transition metals (TMs)
                      from the cathode and deposition at the graphite-based anode.
                      Interestingly, the TM deposits at the anode are locally
                      accumulated and dendritic Li deposits are analytically
                      indicated on exactly these spots. Severe formation of Li
                      dendrites is concluded to be the onset of sudden and abrupt
                      capacity fade as it is accompanied by severe consumption of
                      active Li. In contrast, NCM523 CAMs based on single-crystals
                      (SCs), which are single-standing primary particles,
                      demonstrate an improved cycle life in SC-NCM523‖graphite
                      cells. Less rollover fading, cross-talk and Li dendrites at
                      the anode are observed and attributed to the morphology of
                      the SC-based cathode. It is concluded that the lower
                      specific surface area diminishes electrolyte contact, thus
                      the reaction area for transition metal dissolution and
                      finally improves the high voltage performance.},
      cin          = {IEK-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {122 - Elektrochemische Energiespeicherung (POF4-122)},
      pid          = {G:(DE-HGF)POF4-122},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000635284900017},
      doi          = {10.1039/D0TA11775G},
      url          = {https://juser.fz-juelich.de/record/890626},
}