Abstract
The Ruddlesden-Popper (R-P) oxides Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ with x = 0 and 0.4 and Ln = La, Pr, and Nd, have been synthesized and the effect of Ca on their electrochemical properties as cathodes in solid oxide fuel cells (SOFC) has been investigated. The substitution of Ca for Sr in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ decreases the amount of oxygen loss on heating and the thermal expansion coefficient (TEC). The phase instability of these materials at high temperature is a significant issue that restricts their application as SOFC cathodes, and the substitution of Ca effectively stabilizes the Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ phase at 800 °C. Among the different lanthanides with and without Ca in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ, the Ln = Nd samples exhibit an enhancement in cathode performance in SOFC compared to Ln = La and Pr samples, which may be attributed to the higher concentration of oxygen vacancies in the Ln = Nd samples. Comparing the various compositions studied, the Sr2.8Ca0.4Nd0.8Fe1.5Co1.5O10-δ cathode material exhibits superior performance in SOFC with good phase stability.
| Original language | English |
|---|---|
| Pages (from-to) | 249-256 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 374 |
| DOIs | |
| Publication status | Published - 2018 Jan 15 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
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Effect of Ca substitution on the electrochemical properties of the Ruddlesden-Popper oxides Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-Δ. / Padmasree, K. P.; Lai, Ke Yu; Watchareeya, Kaveevivitchai; Manthiram, Arumugam.
In: Journal of Power Sources, Vol. 374, 15.01.2018, p. 249-256.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of Ca substitution on the electrochemical properties of the Ruddlesden-Popper oxides Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-Δ
AU - Padmasree, K. P.
AU - Lai, Ke Yu
AU - Watchareeya, Kaveevivitchai
AU - Manthiram, Arumugam
PY - 2018/1/15
Y1 - 2018/1/15
N2 - The Ruddlesden-Popper (R-P) oxides Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ with x = 0 and 0.4 and Ln = La, Pr, and Nd, have been synthesized and the effect of Ca on their electrochemical properties as cathodes in solid oxide fuel cells (SOFC) has been investigated. The substitution of Ca for Sr in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ decreases the amount of oxygen loss on heating and the thermal expansion coefficient (TEC). The phase instability of these materials at high temperature is a significant issue that restricts their application as SOFC cathodes, and the substitution of Ca effectively stabilizes the Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ phase at 800 °C. Among the different lanthanides with and without Ca in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ, the Ln = Nd samples exhibit an enhancement in cathode performance in SOFC compared to Ln = La and Pr samples, which may be attributed to the higher concentration of oxygen vacancies in the Ln = Nd samples. Comparing the various compositions studied, the Sr2.8Ca0.4Nd0.8Fe1.5Co1.5O10-δ cathode material exhibits superior performance in SOFC with good phase stability.
AB - The Ruddlesden-Popper (R-P) oxides Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ with x = 0 and 0.4 and Ln = La, Pr, and Nd, have been synthesized and the effect of Ca on their electrochemical properties as cathodes in solid oxide fuel cells (SOFC) has been investigated. The substitution of Ca for Sr in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ decreases the amount of oxygen loss on heating and the thermal expansion coefficient (TEC). The phase instability of these materials at high temperature is a significant issue that restricts their application as SOFC cathodes, and the substitution of Ca effectively stabilizes the Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ phase at 800 °C. Among the different lanthanides with and without Ca in Sr3.2-xCaxLn0.8Fe1.5Co1.5O10-δ, the Ln = Nd samples exhibit an enhancement in cathode performance in SOFC compared to Ln = La and Pr samples, which may be attributed to the higher concentration of oxygen vacancies in the Ln = Nd samples. Comparing the various compositions studied, the Sr2.8Ca0.4Nd0.8Fe1.5Co1.5O10-δ cathode material exhibits superior performance in SOFC with good phase stability.
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U2 - 10.1016/j.jpowsour.2017.11.047
DO - 10.1016/j.jpowsour.2017.11.047
M3 - Article
VL - 374
SP - 249
EP - 256
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -