Research output: Contribution to journal › Article › peer-review
New mixed ionic and electronic conductors based on LaScO3 : Protonic ceramic fuel cells electrodes. / Plekhanov, M. S.; Kuzmin, A. V.; Tropin, E. S.; Korolev, D. A.; Ananyev, M. V.
In: Journal of Power Sources, Vol. 449, 227476, 15.02.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - New mixed ionic and electronic conductors based on LaScO3
T2 - Protonic ceramic fuel cells electrodes
AU - Plekhanov, M. S.
AU - Kuzmin, A. V.
AU - Tropin, E. S.
AU - Korolev, D. A.
AU - Ananyev, M. V.
N1 - Funding Information: This study is partly supported by the grant of the Russian Science Foundation (Project number no. 16-13-00053 ) and the act 211 of Government of the Russian Federation , agreement no. 02.A03.21.0006 . The work is done using the facilities of the Shared access center “Composition of Compounds” of IHTE UB RAS. Appendix A Publisher Copyright: © 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/2/15
Y1 - 2020/2/15
N2 - In the present work, the well-known proton conducting oxide La0.9Sr0.1ScO3-δ (LSS) is modified by the introduction of transition metal cations into a Sc sublattice in order to enhance the electronic conductivity of the material. Introduced cations of transition metal are selected on the basis of their ion radii and the variety of oxidation state, thus the compositions under study are La0.9Sr0.1Sc1-xMexO3–α (LSSMe) (where Me is Ti, Fe, Co, Ni, or Mo). Introduction of more than 5 mol.% of a dopant leads to a change in conductivity behaviour on pO2 which means that the predominant disorder type shifts from ionic to electronic. Electrochemical performance is studied on both symmetric and fuel cells. Impedance spectra are analysed by means of the distribution of relaxation time (DRT) technique. Both cathodes and anodes have shown great electrochemical performance with polarization resistance at 800 °C as low as 0.005 Ohm*cm2 for the cathode and 0.039 Ohm*cm2 for the anode in wet (water vapour pressure (pH2O) = 2.5*10−2 atm) air and hydrogen respectively.
AB - In the present work, the well-known proton conducting oxide La0.9Sr0.1ScO3-δ (LSS) is modified by the introduction of transition metal cations into a Sc sublattice in order to enhance the electronic conductivity of the material. Introduced cations of transition metal are selected on the basis of their ion radii and the variety of oxidation state, thus the compositions under study are La0.9Sr0.1Sc1-xMexO3–α (LSSMe) (where Me is Ti, Fe, Co, Ni, or Mo). Introduction of more than 5 mol.% of a dopant leads to a change in conductivity behaviour on pO2 which means that the predominant disorder type shifts from ionic to electronic. Electrochemical performance is studied on both symmetric and fuel cells. Impedance spectra are analysed by means of the distribution of relaxation time (DRT) technique. Both cathodes and anodes have shown great electrochemical performance with polarization resistance at 800 °C as low as 0.005 Ohm*cm2 for the cathode and 0.039 Ohm*cm2 for the anode in wet (water vapour pressure (pH2O) = 2.5*10−2 atm) air and hydrogen respectively.
KW - DRT
KW - Electrodes
KW - Impedance spectroscopy
KW - LaScO
KW - Mixed ionic and electronic conductors
KW - PCFC
KW - Protonic-ceramic fuel cell
KW - POLARIZATION RESISTANCE
KW - LaScO3
KW - CATHODE
KW - CONDUCTIVITY
KW - PEROVSKITE
KW - ANODE
KW - ELECTROCHEMICAL PERFORMANCE
UR - http://www.scopus.com/inward/record.url?scp=85075875144&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.227476
DO - 10.1016/j.jpowsour.2019.227476
M3 - Article
AN - SCOPUS:85075875144
VL - 449
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
M1 - 227476
ER -
ID: 70793754