Thermal expansion, gas permeability, and conductivity of Ni-YSZ anodes produced by different techniques

Development of Bi‐layer Metal Substrate Architectures for Suspension Plasma Sprayed Solid Oxide Fuel Cells

“…The measured permeabilities found are 3.77 × 10 −14 m 2 for the bi‐layered supports and 3.05 × 10 −14 m 2 for the single‐layered substrate. For comparison purposes, permeabilities of different coatings fabricated by plasma spraying and a support fabricated by tape casting as well as an anode support fabricated by combustion synthesis are presented in Table . Permeabilities of electrolyte coatings found in the literature are included in Table to provide a better picture of the magnitude of the permeability in cases where mostly dense but non‐defect free coatings are fabricated.…”

Scalable synthetic method for SOFC compounds

“…The conductivity values obtained for the compounds are not comparable with the literature conductivity data ( [22,24,28]), because these results are obtained on samples prepared using different chemical routes and/or calcined at different temperatures from ours, which may influence the size of the powder particles and the resultant grain size in sintered body [29,30].…”

Solid oxide electrolysis cells – current material development and industrial application

“…349 The initial value of 11.88 × 10 −6 K −1 increased to 12.23 × 10 −6 K −1 using 15 wt% of pore former. 349 For a 50% Ni-YSZ material fabricated by citric method TEC of 9.1 × 10 −6 K −1 was obtained in 5% H 2 + 95% Ar atmosphere. 353 The electrical conductivity is partly inuenced by the particle size of the material, the porosity, the volume fraction of Ni, the distribution of Ni and YSZ or GDC inside the material, and the percolation threshold of Ni (see Section 3.3.2).…”

“…352 An investigation regarding the influence of porosity and sintering temperature on the resulting TECs and the electrical conductivity of Ni-YSZ (50 : 50 wt%) showed that the thermal expansion of Ni-YSZ changes with the addition of pore former. 349 The initial value of 11.88 × 10 −6 K −1 increased to 12.23 × 10 −6 K −1 using 15 wt% of pore former. 349 For a 50% Ni-YSZ material fabricated by citric method TEC of 9.1 × 10 −6 K −1 was obtained in 5% H 2 + 95% Ar atmosphere.…”

“…347 Properties of the Ni cermets such as the thermal expansion coefficient or electrical conductivity depend on the material fabrication process and its resulting microstructure. 348,349 For the Ni-GDC cermet, first, a TEC of 14.3 × 10 −6 K −1 was approximated. 350 The measured TEC for a NiO-GDC (50 : 50 wt%) composite in air resulted in 13.5 × 10 −6 K −1 for a temperature range of 25–1000 °C.…”