Design, Synthesis, Structure and Properties of Ba-Doped Derivatives of SrCo0.95Ru0.05O3-δ Perovskite as Cathode Materials for SOFCs

被引：8

作者：

Sydyknazar, Sabina ^{[1
]}

Cascos, Vanessa ^{[1
]}

Troncoso, Loreto ^{[1
,2
]}

Laura Larralde, Ana ^{[3
]}

Teresa Fernandez-Diaz, Maria ^{[4
]}

Antonio Alonso, Jose ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

[2] Univ Austral Chile, Inst Mat & Proc Termomecan, Gen Lagos 2086, Valdivia 5111187, Chile

[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Inorgan Analit & Quim Fis, INQUIMAE, C1428EGA, Buenos Aires, DF, Argentina

[4] Inst Laue Langevin, BP 156X, F-38042 Grenoble, France

来源：

MATERIALS | 2019年 / 12卷 / 12期

关键词：

IT-SOFC; cathode; perovskite; neutron diffraction; SrCoO3; TRANSPORT-PROPERTIES; OXYGEN REDUCTION; X=0.05;

D O I：

10.3390/ma12121957

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have designed and prepared a novel cathode material for solid oxide fuel cell (SOFC) based on SrCo0.95Ru0.05O3-delta perovskite. We have partially replaced Sr by Ba in Sr0.9Ba0.1Co0.95Ru0.05O3-delta (SBCRO) in order to expand the unit-cell size, thereby improving the ionic diffusion of O2- through the crystal lattice. The characterization of this new oxide has been studied at room temperature by X-ray diffraction (XRD) and neutron powder diffraction (NPD) experiments. At room temperature, SBCRO perovskite crystallizes in the P4/mmm tetragonal space group, as observed from NDP data. The maximum conductivity value of 18.6 S cm(-1) is observed at 850 degrees C. Polarization resistance measurements on LSGM electrolyte demonstrate an improvement in conductivity with respect to the parent Sr-only perovskite cathode. A good chemical compatibility and an adequate thermal expansion coefficient make this oxide auspicious for using it as a cathode in SOFC.

引用

页数：13

共 17 条

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