Insulative Phase Formation and Polarization Resistance of PrBaCo2−xCuxO5+δ under Thermal Stress
Source abstract
Abstract
The degradation behavior of PrBaCo2−xCuxO5+δ (x = 0, 0.2, 0.5) under thermal stress was investigated in terms of phase formation and polarization resistance. The tetragonal phase was indexed in all compositions of PBCCux, and the secondary phase, BaO, was identified after thermal degradation in the crystal structure analysis. BaO formation is induced by the nature of perovskite to terminate the surface with AO layer. For pristine specimens, the oxygen vacancy peak ratio was increased from 57% to 60% according to the decrease in the average oxidation number of the B-site ion with Cu doping. After thermal deterioration, the oxidation number of B-site ions was increased, and the M = O bonding peak increased due to the decrease in oxygen vacancies and BaO formation according to the thermal stress. In all compositions, the electrical conductivity decreased from 1000 S/cm to 17 S/cm, and the polarization resistance increased approximately 200 times. These results are considered to be related to the increase in the oxidation number of B-site ions along with the formation of secondary phases.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea
Material Technology Center, Korea Testing Laboratory, Seoul 08389, Korea
Funding
Ministry of Trade, Industry and Energy
References (32)
Show source-provided references
1. Thermal and electrochemical properties of PrBa0.5Sr0.5Co2−xFexO5+δ (x = 0.5, 1.0, 1.5) cathode materials for solid oxide fuel cells10.1016/j.jpowsour.2013.01.064 ↗
2. Electrochemical performance of PrBaCo2O5+δ layered perovskite as an intermediate-temperature solid oxide fuel cell cathode10.1016/j.jpowsour.2008.06.075 ↗
3. Novel cathodes for low-temperature solid oxide fuel cells10.1002/1521-4095(20020404)14:7<521::AID-ADMA521>3.0.CO;2-C ↗
4. Intermediate temperature SOFC—A promise for the 21st century10.1016/S0378-7753(97)02789-4 ↗
5. Intermediate temperature solid oxide fuel cells10.1039/b612060c ↗
6. The polarization of mixed conducting SOFC cathodes: Effects of surface reaction coefficient, ionic conductivity and geometry10.1016/S0955-2219(03)00561-2 ↗
7. Oxygen reduction reactions in the SOFC cathode of Ag/CeO210.1016/j.ssi.2006.02.029 ↗
8. Oxygen reduction mechanism at porous La1−xSrxCoO3−d cathodes/La0.8Sr0.2Ga0.8Mg0.2O2.8 electrolyte interface for solid oxide fuel cells10.1016/S0013-4686(00)00722-2 ↗
9. Modelling the porous cathode of a SOFC: Oxygen reduction mechanism effect10.1007/s10800-006-9208-x ↗
10. Oxygen reaction on strontium-doped lanthanum cobaltite dense electrodes at intermediate temperatures10.1016/S0167-2738(01)00692-0 ↗
11. Cobalt based layered perovskites as cathode material for intermediate temperature Solid Oxide Fuel Cells: A brief review10.1016/j.jpowsour.2015.08.034 ↗
12. Layered perovskite PrBa0.5Sr0.5CoCuO5+δ as a cathode for intermediate-temperature solid oxide fuel cells10.1016/j.jallcom.2014.03.138 ↗
13. Degradation efficiency of methyl orange dye by La0.5Sr0.5CoO3 perovskite oxide under dark and UV irradiated conditions10.1016/j.dyepig.2020.108743 ↗
14. Structural Chemistry and Conductivity of a Solid Solution of YBa1−xSrxCo2O5+δ10.1021/jp0755241 ↗
15. Surface cation segregation and chromium deposition on the double-perovskite oxide PrBaCo2O5+δ10.1021/acsami.7b17881 ↗
16. Electrochemical evaluation of double perovskite PrBaCo2−xMnxO5+δ (x = 0, 0.5, 1) as promising cathodes for IT-SOFCs10.1016/j.ijhydene.2018.03.163 ↗
17. Highly enhanced electrochemical performance of PrBa0.92Co2O5+δ cathode by introducing Ba cationic-deficiency10.1016/j.ijhydene.2011.11.095 ↗
18. Performance of double-proveskite YBa0. 5Sr0. 5Co2O5+δ as cathode material for intermediate-temperature solid oxide fuel cells10.1016/j.ijhydene.2011.02.090 ↗
19. Jiseung, R. (2017). Lattice Relaxation and Electrochemical Properties of Cobalt Based Layered Perovskite and Its Surface Modificationl, Pusan National University.
20. Valence band structure and oxygen reduction reaction of Cu doped PrBaCo2O5+δ10.1016/j.matlet.2020.128399 ↗
21. Oxygen content, cobalt oxide exsolution and defect structure of the double perovskite PrBaCo2O6−δ10.1039/C5TA08390G ↗
22. Electrophysical properties of layered perovskites LnBaCo2−xCuxO5+δ (Ln = Sm, Nd) for solid oxide fuel cells10.1134/S1023193511060164 ↗
23. Controlling cation segregation in perovskite-based electrodes for high electro-catalytic activity and durability10.1039/C7CS00120G ↗
24. PrxBa1−xCoO3 oxide electrodes for oxygen evolution reaction in alkaline solutions by chemical solution deposition10.1149/2.0311603jes ↗
25. The comparative experimental investigations of SrMn (Co3+/Co2+) O3±δ and SrMn (Cu2+) O3±δ perovskites towards soot oxidation activity10.1016/j.mcat.2019.110665 ↗
26. Pr/Ba cation-disordered perovskite Pr2/3Ba1/3CoO3−δ as a new bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions10.2109/jcersj2.18076 ↗
27. Improving the spin entropy by suppressing Co4+ concentration in thermoelectric Ca3Co4O9+δ10.1016/j.ceramint.2012.07.071 ↗
28. XPS study of the Cu@ Cu2O core-shell nanoparticles10.1016/j.apsusc.2008.08.110 ↗
29. Magnetic properties of praseodymium ions in Na2O–Pr2O3–SiO2 glasses10.1016/S0304-8853(02)00568-1 ↗
30. Layered cobaltites: Synthesis, oxygen nonstoichiometry, transport and magnetic properties10.12693/APhysPolA.111.7 ↗
31. Defect formation in double perovskites PrBaCo2−xCuxO5+δ at elevated temperatures10.1016/j.ssi.2015.02.004 ↗
32. Preparation and performance of Pr0.7Sr0.3Co1−yCuyO3−δ as cathode material of IT-SOFCs10.1016/j.ssi.2008.01.031 ↗