Synthesis and preliminary study of pure and Zr-doped YMnO3 compounds as Solid Oxide Fuel Cells electrode

JOURNAL OF ALLOYS AND COMPOUNDS

卷:690

Article

Moreno Botello, Zulma Liliana^1,2  Caneiro, Alberto²  Roussel, Pascal³  Gauthier, Gilles¹ 

[1] Univ Ind Santander, Grp INTERFASE, Ciudad Univ,Calle 9,Carrera 27, Bucaramanga, Santander, Colombia

[2] Comis Nacl Energia Atom, Ctr Atom Bariloche, Av Bustillo 9500, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Univ Lille Nord France, UCCS, CNRS UMR8181, ENSCL USTL, BP90108, F-59652 Villeneuve Dascq, France

关键词: Solid Oxide Fuel Cells;    Electrode;    Yttrium manganite;    Reducibility;    Reactivity;   

DOI  :  10.1016/j.jallcom.2016.08.125

来源: Elsevier

【 摘 要 】

The Y1-xZrxMnO3 series (0 <= x <= 0.30) has been studied to be used as possible SOFC electrode material. These compounds adopt a layered structure of hexagonal symmetry in which the manganese cations are located in trigonal bi-pyramidal coordination of oxygen atoms, different from that of the classical perovskite. The synthesis of the materials has been carried out by solid state reaction and X-ray diffraction technique reveals that pure phases can be obtained until x similar to 0.10. For x >= 0.10, an additional YSZ phase is formed, similar to the SOFC electrolyte material. HT-XRD technique and thermogravimetric analysis of pure or Zr-doped YMnO3 indicate that, in diluted dry H-2 for T > 600 degrees C, these compounds are unstable, what precludes their use as anode material. On the other hand, reactivity studies at high temperature (T = 1300 degrees C) between Y1-xZrxMnO3 (x = 0, 0.05 and 0.1) and BYSZ show a chemical compatibility in which the formation of an electrically insulating phase does not take place, but a crossed diffusion of Y3+/Mn3+ and Zr4+ at the interface between both materials. Thermomechanical compatibility in air between YSZ and Y1-xZrxMnO3 is also demonstrated from RT to 850 degrees C. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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