A feasible strategy for tailoring stable spray‐coated electrolyte layer in micro‐tubular solid oxide fuel cells

Abstract

By this work, the viability of the spray coating as a cost‐effective and reliable technique for the coating of Ce0.9Gd0.1O1.95 (GDC) electrolyte layer on the mini‐tubular NiO–GDC anodes based a solid oxide fuel cell (SOFC) fabrication was assessed. The compatibility of the anode and electrolyte was analyzed by using XRD. The variation in thickness and morphology of the electrolyte film as a function of the coating cycles was discussed with optical and scanning electron microscopes. By similar formulation, the coating of La0.6Sr0.4Fe0.8Co0.2O3 –Ce0.9Gd0.1O2–δ (LSCF–GDC) was performed to achieve porous cathode. An individual micro‐tubular anode supported cell with configuration NiO–GDC/GDC/LSCF–GDC as anode/electrolyte/cathode was tested in the SOFC mode with humidified hydrogen as fuel and stationary air as oxidant. The fabricated mini‐SOFC prototype that generated a maximum power density of 0.510 W/cm2 at 600°C signifies the potential of this industrially scalable low‐cost coating technique.

Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

“…The high reactivity of the (La, Sr)-containing electrodes with the conventional YSZ electrolyte facilitated extensive investigations of the LSM-based cathodes formed on the SDC [148][149][150][151], GDC [152], SSZ [151,153], LSGM [149], BaZr 0.8 Y 0.2 O 3 − δ (BZY20) [154], La 9.5 Si 6 O 26.25 [155], and La 27.44 W 4.56 O 55.68 (LWO56) [156] electrolytes as an alternative. The LSCF-based cathodes were formed on the SSZ [157], SDC [158,159], Ce 0.9 Gd 0.1 O 2 − δ (GDC10) [160][161][162], GDC [126,[163][164][165][166][167] Y 0.1 Ce 0.9 O 1.95 [168], Nd 0.2 Ce 0.8 O 3 − δ [169], SSZ [170], LSGM [171,172], GDC with LSGM [173], SDC with LSGM [174], BZY20 [175], BaZr 0.9 Y 0.1 O 3 − δ [176], BaZr 0.8 Yb 0.2 O 3 − δ (BZYb) [177], BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3 − δ (BCZYYb) [178][179][180][181][182], BaCe 0.7 Zr 0.1 Y 0.2 O 3 − δ (BCZY) [183][184][185], and BaCe 0.7 Zr 0.15 Y 0.15 O 3 − δ (BCZY15) [186] electrolytes.…”

Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

“…6 NiO nanoparticles with favorable magnetic, optical, photochemical, photocatalytic, and dielectric properties have various applications, such as making gas sensors, supercapacitors, solar cells, and drug delivery materials. [7][8][9][10][11] Moreover, the chemical stability of NiO particles has caused it to be a suitable inhibitor to prevent the substrate reaction with the surrounding environment in coating applications. 2,12,13 Green particles of Cr 2 O 3 with antibacterial features, chemical stability, thermal stability, and high hardness are used in medical fields, improving the corrosion properties of metals at high temperatures and forming wear-resistant coatings in dry and wet environments.…”

“…In the meantime, metal oxides produced at the nanoscale are an essential member of widely used materials in surface engineering 6 . NiO nanoparticles with favorable magnetic, optical, photochemical, photocatalytic, and dielectric properties have various applications, such as making gas sensors, supercapacitors, solar cells, and drug delivery materials 7–11 . Moreover, the chemical stability of NiO particles has caused it to be a suitable inhibitor to prevent the substrate reaction with the surrounding environment in coating applications 2,12,13 .…”