Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Structure, oxygen transport properties and electrode performance of Ca-substituted Nd 2 NiO 4. / Pikalova, E. Yu; Sadykov, V. A.; Filonova, E. A. и др.
в: Solid State Ionics, Том 335, 01.07.2019, стр. 53-60.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Structure, oxygen transport properties and electrode performance of Ca-substituted Nd 2 NiO 4
AU - Pikalova, E. Yu
AU - Sadykov, V. A.
AU - Filonova, E. A.
AU - Eremeev, N. F.
AU - Sadovskaya, E. M.
AU - Pikalov, S. M.
AU - Bogdanovich, N. M.
AU - Lyagaeva, J. G.
AU - Kolchugin, A. A.
AU - Vedmid, L. B.
AU - Ishchenko, A. V.
AU - Goncharov, V. B.
N1 - Publisher Copyright: © 2019 Elsevier B.V.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Mixed ionic-electronic conductors are of great interest for development of oxygen separation membranes and air electrodes for intermediate temperature solid oxide fuel and electrolysis cells. This work presents the results of studying the structure, transport properties and oxygen mobility in Nd 2−x Ca x NiO 4 oxides (x = 0–0.5), synthesized via a solution-assisted solid state reaction method, in correlation with the over-stoichiometric oxygen content. High oxygen mobility was demonstrated in the low-doped materials (D O ~ 10 −10 –10 −8 cm 2 /s at 700 °C) which corresponded to the ionic (oxygen) conductivity values ~ 10 −4 –10 −2 S/cm, comparable to those for widely used solid electrolytes and state-of-the-art cathode materials. The polarization resistance of the Nd 2−x Ca x NiO 4+δ electrodes in contact with Ce 0.8 Sm 0.2 O 1.9 electrolyte was shown to have non-linear dependency on Ca content, which may be caused by the influence of two opposite tendencies for decreasing over-stoichiometric oxygen and oxygen diffusivity and increasing the total conductivity with Ca doping. High electrical and electrochemical characteristics along with oxygen mobility mean the materials developed display high potential for electrochemical and catalytic applications.
AB - Mixed ionic-electronic conductors are of great interest for development of oxygen separation membranes and air electrodes for intermediate temperature solid oxide fuel and electrolysis cells. This work presents the results of studying the structure, transport properties and oxygen mobility in Nd 2−x Ca x NiO 4 oxides (x = 0–0.5), synthesized via a solution-assisted solid state reaction method, in correlation with the over-stoichiometric oxygen content. High oxygen mobility was demonstrated in the low-doped materials (D O ~ 10 −10 –10 −8 cm 2 /s at 700 °C) which corresponded to the ionic (oxygen) conductivity values ~ 10 −4 –10 −2 S/cm, comparable to those for widely used solid electrolytes and state-of-the-art cathode materials. The polarization resistance of the Nd 2−x Ca x NiO 4+δ electrodes in contact with Ce 0.8 Sm 0.2 O 1.9 electrolyte was shown to have non-linear dependency on Ca content, which may be caused by the influence of two opposite tendencies for decreasing over-stoichiometric oxygen and oxygen diffusivity and increasing the total conductivity with Ca doping. High electrical and electrochemical characteristics along with oxygen mobility mean the materials developed display high potential for electrochemical and catalytic applications.
KW - Ca doping
KW - Cathode
KW - Electrochemical behavior
KW - Isotope exchange
KW - Nd NiO
KW - SOFC
KW - Transport properties
KW - ELECTROCHEMICAL PROPERTIES
KW - SURFACE EXCHANGE
KW - LA2NIO4+DELTA
KW - CATHODE MATERIALS
KW - Nd2NiO4
KW - IMPEDANCE
KW - DIFFUSION
KW - OXIDES
KW - LANTHANUM
KW - MICROSTRUCTURE
KW - PERMEATION
UR - http://www.scopus.com/inward/record.url?scp=85061974411&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2019.02.012
DO - 10.1016/j.ssi.2019.02.012
M3 - Article
AN - SCOPUS:85061974411
VL - 335
SP - 53
EP - 60
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
ER -
ID: 18626022