TY - JOUR

T1 - Doped (Nd,Ba)FeO3 oxides as potential electrodes for symmetrically designed protonic ceramic electrochemical cells

AU - Tarutina, Liana R.

AU - Lyagaeva, Julia G.

AU - Farlenkov, Andrei S.

AU - Vylkov, Alexey I.

AU - Vdovin, Gennady K.

AU - Murashkina, Anna A.

AU - Demin, Anatoly K.

AU - Medvedev, Dmitry A.

N1 - Publisher Copyright: © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - The design of new electrode materials with high redox stability has great potential for the fabrication of solid oxide fuel and electrolysis cells having a symmetrical configuration; such a configuration is particularly promising in terms of economic and technological factors due to involving a reduced number of functional materials and technological steps. Under the framework of the present study, we developed new Nd1–xBaxFe0.9M0.1O3–δ materials (where M = Cu or Ni, x = 0.4 or 0.6), characterizing their functional properties (oxygen non-stoichiometry, thermomechanical and electrical properties) under both oxidizing and reducing conditions, as well as demonstrating the principal capability of their application as symmetrical electrodes in proton-conducting electrochemical cells. The obtained results demonstrate the desirability of a low barium content due to decreased thermal expansion coefficients and chemical strain contribution and Cu-doping due to the formation of an electrochemically active scaffold having nano-sized sediments. The Nd0.6Ba0.4Fe0.9Cu0.1O3–δ electrodes fabricated onto the BaCe0.5Zr0.3Y0.1Yb0.1O3–δ proton-conducting electrolytes exhibit polarization resistances of 1.1 and 15.1 Ω cm2 at 600 °C in wet air and wet hydrogen measuring atmospheres, respectively. These reported results are among the first concerning the effective operation of symmetrical electrodes in systems with proton-conducting electrolytes. [Figure not available: see fulltext.].

AB - The design of new electrode materials with high redox stability has great potential for the fabrication of solid oxide fuel and electrolysis cells having a symmetrical configuration; such a configuration is particularly promising in terms of economic and technological factors due to involving a reduced number of functional materials and technological steps. Under the framework of the present study, we developed new Nd1–xBaxFe0.9M0.1O3–δ materials (where M = Cu or Ni, x = 0.4 or 0.6), characterizing their functional properties (oxygen non-stoichiometry, thermomechanical and electrical properties) under both oxidizing and reducing conditions, as well as demonstrating the principal capability of their application as symmetrical electrodes in proton-conducting electrochemical cells. The obtained results demonstrate the desirability of a low barium content due to decreased thermal expansion coefficients and chemical strain contribution and Cu-doping due to the formation of an electrochemically active scaffold having nano-sized sediments. The Nd0.6Ba0.4Fe0.9Cu0.1O3–δ electrodes fabricated onto the BaCe0.5Zr0.3Y0.1Yb0.1O3–δ proton-conducting electrolytes exhibit polarization resistances of 1.1 and 15.1 Ω cm2 at 600 °C in wet air and wet hydrogen measuring atmospheres, respectively. These reported results are among the first concerning the effective operation of symmetrical electrodes in systems with proton-conducting electrolytes. [Figure not available: see fulltext.].

KW - BaCeO

KW - BaZrO

KW - Perovskite

KW - Proton-conducting materials

KW - SOFCs & SOECs

KW - Symmetrical electrodes

UR - http://www.scopus.com/inward/record.url?scp=85079702957&partnerID=8YFLogxK

U2 - 10.1007/s10008-020-04522-4

DO - 10.1007/s10008-020-04522-4

M3 - Article

VL - 24

SP - 1453

EP - 1462

JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

SN - 1432-8488

IS - 7

ER -