Continuum mechanics simulations of NiO/Ni–YSZ composites during reduction and re-oxidation

Ni-8YSZ cermet re-oxidation of anode supported solid oxide fuel cell: From kinetics measurements to mechanical damage prediction

“…Pihlatie et al [37] have proposed a 1 dimension mechanistic analysis including a nonelastic strain to take the creep into account. This approach allows simulating the dimensional change of the cermet during 'redox' cycles.…”

Creep behaviour of porous SOFC electrodes: Measurement and application to Ni-8YSZ cermets

“…31 Vacancies can diffuse either through the bulk of crystallographic grains (Nabarro-Herring creep) or along the grains boundaries (Coble creep). Both mechanisms are thermally activated mechanism and are combined into the following expression 32 (12) where k denotes the Boltzmann's constant, Ω Ni the atomic volume, d Ni the grain size and δ Ni the effective grain boundary thickness.…”

A composite cathode based on scandium-doped chromate for direct high-temperature steam electrolysis in a symmetric solid oxide electrolyzer

“…Traditional NieYSZ composite has been extensively investigated as a cathode materials for steam electrolysis in oxygen ion-conducting solid oxide electrolyzers [6,7]. However, a certain amount of hydrogen is required to flow over Ni cermet to avoid the oxidation of Ni to NiO, which causes a decrease of electrical conductivity and even the degradation of the electrodes [8,9].…”