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@INPROCEEDINGS{Ma:863620,
      author       = {Ma, Qianli and Tietz, Frank and Menzler, Norbert H. and
                      Guillon, Olivier},
      title        = {{L}a0.97{N}i0.5{C}o0.5{O}3-δ as air electrode material for
                      solid oxide cells},
      reportid     = {FZJ-2019-03632},
      year         = {2019},
      abstract     = {Based on former research on perovskites in the
                      quasi-ternary system LaFeO3–LaCoO3–LaNiO3[1],
                      LaNi0.5Co0.5O3 (LNC) has been chosen as the most promising
                      air electrode material for solid oxide cells (SOCs) in this
                      system. In the present study, A-site deficiency of LNC is
                      discussed and La0.97Ni0.5Co0.5O3 (LNC97) is selected as the
                      further optimized composition, which has an electronic
                      conductivity of over 1000 S cm-1 at 800oC [2] .
                      Compatibility of LNC97 with 8 $mol\%$ Y2O3 stabilized ZrO2
                      (8YSZ) is analyzed and compared with that of
                      La0.58Sr0.4Co0.8Fe0.2O3-δ (LSCF) and 8YSZ. According to the
                      requirements of the air electrode materials with qualified
                      performance, i.e. 1) high electronic conductivity, 2) high
                      ionic conductivity, and 3) high catalytic activity for the
                      oxygen reduction reaction, LNC97 based electrodes are
                      modified, characterized and optimized by symmetric cell
                      tests. Degradation of the symmetric cells after 1000 h of
                      operation is discussed. Mechanisms for explaining the
                      electrode-processes of LNC97-based electrodes are raised.
                      Full cells based on optimized LNC97 material were tested
                      under both fuel cell mode and electrolyzer mode. The
                      achieved performances are even better than
                      the-state-of-the-art LSCF based SOCs, indicating a
                      prospective future for the developed material and the
                      air-electrode.[1] F. Tietz, I. ArulRaj, Q. Ma, S.Baumann,
                      A.Mahmoud, R.P.Hermann, J. Solid State Chem. 237 (2016)
                      183–191.[2] Q. Ma, M. Balaguer, D. Pérez-Coll, L. G. J.
                      de Haart, J. M. Serra, G. C. Mather, F. Tietz, N. H.
                      Menzler, O. Guillon. ACS Appl. Energy Mater. 1 (2018)
                      2784−2792.},
      month         = {Jun},
      date          = {2019-06-16},
      organization  = {The 22nd International Conference on
                       Solid State Ionics 22nd International
                       Conference on Solid State Ionics,
                       PyeongChang (Korea), 16 Jun 2019 - 21
                       Jun 2019},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
                      (SOFC-20140602)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/863620},
}