Oxygen transport in the La2Ni1−xCoxO4+δ system

  1. Get@NRC: Oxygen transport in the La2Ni1−xCoxO4+δ system (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.ssi.2005.06.002
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
Journal titleSolid State Ionics
Pages18951901; # of pages: 7
SubjectLa2Ni1−xCoxO4+δ; Oxygen diffusion; SIMS; Solid oxide fuel cells
AbstractOxygen isotopic exchange measurements of polycrystalline La2Ni1−xCoxO4+δ have been carried out for the 30%, 50%, 80% and 100% Co doped materials and both the oxygen tracer diffusion coefficient, D*, and surface exchange coefficient, k, determined. Each of the high Co content materials (x ≥ 0.5) was found to have higher diffusion and surface exchange coefficients than the previously reported parent compound La2NiO4+δ. Of greater interest are the relatively high diffusion coefficients calculated for the high cobalt content materials, particularly the La2Ni0.2Co0.8O4+δ and La2CoO4+δ materials over the temperature range 450–650 °C. As the surface exchange coefficients for these materials are also high these materials then meet the D*k product requirement of 10− 14 cm3 s− 2 for cathodes at the low temperature of 470 °C. Keywords: Oxygen diffusion; La2Ni1−xCoxO4+δ; Solid oxide fuel cells; SIMS PACS: 66.30 Hs; 82.47 Ed
Publication date
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
NPARC number12330252
Export citationExport as RIS
Report a correctionReport a correction
Record identifier46803a5c-5afd-4907-878d-b6072e49aef0
Record created2009-09-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)