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@ARTICLE{Aslanbas:848383,
      author       = {Aslanbas, Özgür and Durmus, Yasin Emre and Tempel,
                      Hermann and Hausen, Florian and Ein-Eli, Yair and Eichel,
                      Rüdiger-A. and Kungl, Hans},
      title        = {{E}lectrochemical analysis and mixed potentials theory of
                      ionic liquid based {M}etal–{A}ir batteries with {A}l/{S}i
                      alloy anodes},
      journal      = {Electrochimica acta},
      volume       = {276},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-03624},
      pages        = {399 - 411},
      year         = {2018},
      abstract     = {Aluminium and silicon, when coupled with an air cathode in
                      an electrochemical cell may provide theoretical specific
                      energies of up to 8146 mWh/g and 8470 mWh/g. Proof of
                      concept for the discharge in cells with ionic liquid
                      EMIm(HF)2.3F electrolyte had been established in 2009 for
                      silicon and in 2015 for aluminium. The objective of the
                      present work is the investigation of discharge behavior and
                      corrosion in this type of cell using binary Al/Si alloys as
                      anodes. Al/Si alloys with nine different compositions were
                      prepared by an arc melting process and shaped to anodes.
                      Microstructure of the anodes in the initial state was
                      evaluated with respect to the fractions of its constituents.
                      Al/Si–air primary full cells were investigated with
                      respect to voltages during OCV and discharge during
                      intermediate term (20 h) runs under current densities of
                      250 μA/cm2. Voltages decrease with Si-content in the
                      alloys following trends with quantitatively different
                      characteristics for the hypoeutectic, intermediate
                      hypereutectic and the alloys with high Si content. SEM
                      analysis of surface morphology of the anodes after discharge
                      experiments indicates that for all alloys the discharge
                      capacity results mostly from the oxidation of the aluminium.
                      Potentiodynamic polarization measurements were conducted in
                      order to determine corrosion potentials for the alloys and
                      analyzed with approaches based on mixed potential theory
                      including galvanic coupling. The results are discussed in
                      terms of Evans diagrams; thereby approaches based on
                      alternative scenarios for the galvanic coupling are
                      examined.},
      cin          = {IEK-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {131 - Electrochemical Storage (POF3-131) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-131 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000433042500043},
      doi          = {10.1016/j.electacta.2018.04.176},
      url          = {https://juser.fz-juelich.de/record/848383},
}