Wet chemical synthesis and characterisation of Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3−δ proton conductor

Abstract

Email Addresses of the corresponding authors: mohammad.naeem1@buitms.edu.pk and jtsi@st-andrews.ac.uk ABSTRACT Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3 -δ (BSCZGY) proton conducting electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs) has been synthesized by a sol-gel modified Pechini process and its sinterability, thermal expansion, microstructure, ionic conductivity and chemical stability have been investigated. Ionic conductivity at 700 ºC was measured to be ~ 8 x 10 -3 S cm -1 in wet 5 vol% H2/Ar atmospheres. Chemical stability test in pure CO2 up to 1200 ºC shows that the material is highly stable; better than the stability of BaZr0.3Ce0.5Y0.1Yb0.1O3 -δ.

Highly dense and novel proton conducting materials for SOFC electrolyte

“…The stability issues of cerium based proton conducting electrolyte materials in CO 2 containing atmosphere is the main challenge [17][18][19][20]. In CO 2 containing atmosphere BaCeO 3 reacts with CO 2 and forms BaCO 3 and CeO 2 as shown in Eq.…”

“…Doped barium cerates (BaCeO 3 ) and zirconates (BaZrO 3 ) are extensively investigated in the literatures [10][11][12][13][14][15][16]. These are perovskite (ABO 3 [17][18][19][20]. However, the poor to carbonation (in CO 2 containing atmospheres) as well as the instability in water vapors (atmospheres containing stream, H 2 O) are major challenges for practical applications.…”

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

“…As Iwahara et al [ 10 ] discovered protonic conductivity in SrCeO 3 ceramic oxides, doped BaCeO 3 and doped BaZrO 3 have been extensively investigated as electrolyte materials for proton‐conducting SOFCs (SOFC‐H + ). [ 4,11–14 ] Yttrium‐doped BaCeO 3 has been found to be one of the best proton conductors, but is unstable in CO 2 ‐ and H 2 O‐containing atmospheres. On the contrary, BaZr 0.9 Y 0.1 O 3− δ shows excellent stability in CO 2 ‐ and H 2 O‐containing atmospheres, but its protonic conductivity is not sufficient for practical applications.…”

Understanding of Oxygen Reduction Reaction on Perovskite-Type Ba0.5Sr0.5Fe0.91Al0.09O3-δ and Ba0.5Sr0.5Fe0.8Cu0.2O3-δ Using AC Impedance Spectroscopy Genetic Programming

“…Recently, a novel proton conducting Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3‑δ (BSCZGY) electrolyte has been developed by us, which showed an excellent chemical stability under CO 2 and water vapor conditions. , As recorded ASR values for ORR activity are not low enough for getting high performance during full cell operations on BSCZGY electrolyte, developing highly catalytic active and chemically stable cathode material is underway . Thus in the current report, we have employed above-mentioned advantageous Ba 0.5 Sr 0.5 Fe 1−x Al x O 3‑δ and Ba 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3‑δ cathodes with IT oxide ion conducting La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3‑δ (LSGM) and proton conducting BSCZGY electrolytes.…”