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@INPROCEEDINGS{Park:1020353,
      author       = {Park, Inhee and Durmus, Yasin Emre and Kungl, Hans and
                      Tempel, Hermann and Eichel, Rüdiger-A. and Hausen, Florian},
      title        = {{I}n-{S}itu electrochemical mapping of local activity on
                      {Z}n and {Z}n-{A}l alloy using scanning electrochemical
                      microscopy},
      reportid     = {FZJ-2024-00086},
      year         = {2023},
      abstract     = {Metal-air batteries have gained tremendous attention in the
                      past years as promising technologies due to their
                      theoretically high specific energy and environmentally
                      friendly use of oxygen 1. Considering the cost-effectiveness
                      and natural abundance, Zn and Al are good candidates for
                      metal-air batteries. However, in Zn-air systems, stable
                      cyclability is an issue due to the passivation layer on Zn
                      electrodes in neutral electrolyte. Guerrero et al. reported
                      recently that ethylenediaminetetraacetic acid (EDTA) as an
                      electrolyte additive activates the surface of Zn electrode
                      to maintain metallic property, thereby improving the
                      performance of Zn-air batteries in near-neutral
                      chloride-based electrolyte 2. In this study, we investigate
                      the local activity on Zn and Zn-10Al alloy electrodes in 2 M
                      NaCl (pH 10) containing EDTA by using scanning
                      electrochemical microscopy (SECM). We observed that the
                      surfaces of Zn and Zn-10Al alloy electrodes are passivated
                      at open circuit potential (OCP) and these passivation layers
                      disappear at OCP by adding EDTA in the electrolyte. As the
                      potential is applied to slightly positive of OCP, the
                      formation of the passivation layer is more dominant than the
                      activation by EDTA, resulting from the limited amount of
                      dissociated EDTA in near-neutral electrolyte. It is
                      noteworthy that a clear topographic change is observed by
                      means of AFM-SECM after the electrode contacts with EDTA,
                      which demonstrates the effect of EDTA.},
      month         = {Nov},
      date          = {2023-11-14},
      organization  = {OPERANDO SPM 2023, Berlin (Germany),
                       14 Nov 2023 - 16 Nov 2023},
      subtyp        = {After Call},
      cin          = {IEK-9},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122) / iNEW2.0
                      (BMBF-03SF0627A)},
      pid          = {G:(DE-HGF)POF4-1223 / G:(DE-Juel1)BMBF-03SF0627A},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1020353},
}