TY - JOUR
T1 - Effect of barium on LSGM electrolyte prepared by fast combustion method for solid oxide fuel cells (SOFC)
AU - Sepúlveda, Erwin
AU - Mangalaraja, Ramalinga Viswanathan
AU - Troncoso, Loreto
AU - Jiménez, José
AU - Salvo, Christopher
AU - Sanhueza, Felipe
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to The Materials Research Society.
PY - 2022/12
Y1 - 2022/12
N2 - In this work, La0.85Sr0.15–xBaxGa0.85Mg0.15O3–δ (LSBGM), with 0 ≤ x ≤ 0.075, were prepared as electrolytes for solid oxide fuel cells applications. The effect of barium and sintering temperature on the structure and electrical properties was studied. A fast combustion method was used, starting with nitrate salts and citric acid as fuel. The XRD spectra showed two main phases corresponding to LSGM orthorhombic (space group Imma) and LSGM-cubic (space group Pm-3 m). From literature, both structures are reported as high oxygen ion conductive species, but normally, they are not reported to appear together. Major secondary phases were LaSrGaO4, BaLaGaO4, and BaLaGaO7. SEM revealed a material with low porosity, indicating incomplete densification. The sample La0.85Sr0.075Ba0.075Ga0.85Mg0.15O3–δ showed a conductivity of 0.016 and 0.058 S cm−1 at 600 °C and 800 °C, respectively. This means an improvement of 34% compared to the non-barium sample La0.85Sr0.15Ga0.85Mg0.15O3-δ at 600 °C. Thus, this composition could be used in SOFC. Graphical abstract: [Figure not available: see fulltext.].
AB - In this work, La0.85Sr0.15–xBaxGa0.85Mg0.15O3–δ (LSBGM), with 0 ≤ x ≤ 0.075, were prepared as electrolytes for solid oxide fuel cells applications. The effect of barium and sintering temperature on the structure and electrical properties was studied. A fast combustion method was used, starting with nitrate salts and citric acid as fuel. The XRD spectra showed two main phases corresponding to LSGM orthorhombic (space group Imma) and LSGM-cubic (space group Pm-3 m). From literature, both structures are reported as high oxygen ion conductive species, but normally, they are not reported to appear together. Major secondary phases were LaSrGaO4, BaLaGaO4, and BaLaGaO7. SEM revealed a material with low porosity, indicating incomplete densification. The sample La0.85Sr0.075Ba0.075Ga0.85Mg0.15O3–δ showed a conductivity of 0.016 and 0.058 S cm−1 at 600 °C and 800 °C, respectively. This means an improvement of 34% compared to the non-barium sample La0.85Sr0.15Ga0.85Mg0.15O3-δ at 600 °C. Thus, this composition could be used in SOFC. Graphical abstract: [Figure not available: see fulltext.].
UR - http://www.scopus.com/inward/record.url?scp=85141399293&partnerID=8YFLogxK
U2 - 10.1557/s43580-022-00373-5
DO - 10.1557/s43580-022-00373-5
M3 - Article
AN - SCOPUS:85141399293
SN - 2059-8521
VL - 7
SP - 1167
EP - 1174
JO - MRS Advances
JF - MRS Advances
IS - 35
ER -