The effect of porosity gradient in a Nickel/Yttria Stabilized Zirconia anode for an anode-supported planar solid oxide fuel cell

Fabrication and characterisation of a large-area solid oxide fuel cell based on dual tape cast YSZ electrode skeleton supported YSZ electrolytes with vanadate and ferrite perovskite-impregnated anodes and cathodes

“…The microstructure (Figure 1 (c)) of the scaffold contains a 55-m electrolyte sandwiched between two identical YSZ layers of gradient porosity; the porous inner layer in contact with electrolyte is 52 % porous (48-m thick) measured by image analysis and the outer layer is 67 % porous (112-m thick). This graded design is beneficial for producing a dense electrolyte on the porous structure while providing enough porosity for mass transport [21,24]. The low porosity of the inner layer with smaller pores can also increase the surface area for the impregnated particles to sit on and decrease the pore size for smaller interface resistance.…”

Microarchitectured solid oxide fuel cells with improved energy efficiency (Part II): Fabrication and characterization

“…the porosity is changed gradually along with the depth of anode. Structurally graded materials have been applied to SOFC and have provided the possibility of enhancing the cell performance [24,25]. However, a microarchitectured SOFC fabricated by dry pressing and sintering followed by laser ablation has the advantage of facile porosity control and direct gas transport to the reaction zone layer through porous channels as compared to multilayer tape casting with different pore former content.…”

Effect of Graphite Pore‐Forming Agents on the Sintering Characteristics of Ni/YSZ Composites for Solid Oxide Fuel Cell Applications

“…Other researchers have explored how PFA affect the processing and the electrochemical performance of Ni/YSZ SOFC anodes, [12][13][14][15][16] while others have examined the sintering of NiO/YSZ composites, [17][18][19][20][21] but there is little information in the literature regarding the effect PFA have on the sintering characteristics of Ni/YSZ composites. Given the benefits of controlling the porosity in a SOFC, and the necessity to understand the sintering behavior of the anode in SOFC fabrication, the aim of this research is to determine the effect, if any, the addition of graphite pore formers have on the sintering characteristics and porosity of tape cast Ni/YSZ composites made from NiO powders.…”