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@ARTICLE{Serra:62814,
      author       = {Serra, J. M. and Vert, V. B. and Büchler, O. and
                      Meulenberg, W. A. and Buchkremer, H. P.},
      title        = {{IT}-{SOFC} supported on {M}ixed {O}xygen
                      {I}onic-{E}lectronic {C}onducting {C}omposites},
      journal      = {Chemistry of materials},
      volume       = {20},
      issn         = {0897-4756},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {PreJuSER-62814},
      pages        = {3867 - 3875},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Thin oxygen-ion-conducting films (5-10 mu m) were prepared
                      and characterized on mixed-conducting porous substrates.
                      When this film is made of a pure ionic conductor, such as a
                      gadolinia-doped ceria (Ce0.8Gd0.2O1.9) electrolyte material,
                      the assembly can be used as a cathode-supported solid oxide
                      fuel cell (SOFC) for operation at intermediate temperatures
                      (500-600 degrees C). In this case, a porous anode comprising
                      a Ni-CGO cermet or a Pt coating is deposited on top of the
                      highly conductive electrolyte. Another structure with
                      promising applications is created when the supported
                      gastight layer includes a mixed conductor such as ferrite or
                      cobaltite perovskites acting as oxygen-permeable membrane,
                      which can be applied in the combustion of fuel with pure
                      oxygen or in the intensification of other industrial
                      processes currently using aerial catalytic oxidation. The
                      different supported films and multilayer assemblies were
                      characterized by SEM, EDS-WDX, SIMS, helium, and oxygen
                      permeation, showing that gastight thin films can be achieved
                      (values >1 x 10(-6) mbar L s(-1) cm(-2)) by inexpensive
                      coating procedures (screen-printing or slip-casting). The
                      electrochemical properties of thin CGO electrolytes were
                      studied by impedance spectroscopy (EIS) and DC voltammetry
                      on fully assembled fuel cells. It is concluded that thin CGO
                      electrolytes under hydrogen atmosphere have enough n-type
                      electronic conductivity to reduce the cell potential by
                      $5-20\%$ from the Nernst potential, which causes the
                      consequent power density decrease. A possible solution to
                      these leakage currents is the use of a thin
                      electron-blocking layer as stabilized zirconia (YSZ or SSZ)
                      deposited on the fuel-exposed CGO electrolyte side. Oxygen
                      permeation of thin LSFC layers was measured using air and
                      helium (sweep) in the range from 700 to 1000 degrees C.
                      Supported thin films exhibit much better permeation fluxes
                      than bulk thick membranes, especially when oxygen-reduction
                      catalytic porous coatings were applied.},
      keywords     = {J (WoSType)},
      cin          = {IEF-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB809},
      pnm          = {Rationelle Energieumwandlung / SOFC - Solid Oxide Fuel Cell
                      (SOFC-20140602)},
      pid          = {G:(DE-Juel1)FUEK402 / G:(DE-Juel1)SOFC-20140602},
      shelfmark    = {Chemistry, Physical / Materials Science, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000256854800016},
      doi          = {10.1021/cm702508f},
      url          = {https://juser.fz-juelich.de/record/62814},
}