Investigation on Pr2−Sr NiO4+ (x= 0.3–1.0) cathode materials for intermediate temperature solid oxide fuel cell

Oxygen surface exchange and diffusion in Pr1.75Sr0.25Ni0.75Co0.25O4±δ

“…Solid solution Pr 2Àx Sr x NiO 4+d where x = 0.5, 0.7, 0.9 and 1.0 was investigated in ref. 19. The maximal electrical conductivity was found to be 0.39 S cm À1 at 700 1C in Pr 1.3 Sr 0.7 NiO 4+d .…”

“…The minimal area-specific resistance (ASR) of 0.39 O cm 2 at 700 1C is obtained at x = 0.7 and is attributed to the highest electrical conductivity in a row. 19 The increase in the Sr content is accompanied by a decrease in the hyperstoichiometric oxygen content, leading to oxygen-deficient phases. The values of x at which d is negative are not well defined and vary depending upon the synthesis conditions.…”

Heterointerface Effect in Accelerating the Cathodic Oxygen Reduction for Intermediate-Temperature Solid Oxide Fuel Cells

“…However, its thermal stability was poor, and it was easy to decompose during operation. The structure stability is improved by doping Sr 2+ at the Pr site (Bhoga et al, 2014;Kim and Lee, 2021). Among Pr 2−x Sr x NiO 4 (x = 0.3, 0.5, and 0.8) cathode materials, Pr 1.2 Sr 0.8 NiO 4 had the lowest area-specific resistance value when the Sr doping amount was 0.8, down to 0.112 Ω cm 2 at 800 °C (Yang et al, 2012).…”

Unusual Lattice Parameters Behavior for La1.9Ca0.1NiO4+δ at the Temperatures below Oxygen Loss

“…The widespread electrochemical applications of Ln 2 NiO 4+δ phases are characterised by a number of distinctive features: enhanced mixed ionic-electronic conductivity (MIEC), boosted chemical/thermal stability and mechano-thermal compatibility with electrolyte materials. All the above-mentioned properties made it possible to successfully verify Ln 2 NiO 4+δ derivatives, substituted with alkaline earth metals (Ca, Sr, Ba) on the Lnsite, as cathode materials in the cells both with oxygen- [6,[9][10][11][12][13][14][15][16] and proton-conducting electrolytes [6,[16][17][18][19][20][21].…”