CeO2-doped (Co,Mn)3O4 coatings for protecting solid oxide fuel cell interconnect alloys

THIN SOLID FILMS

卷:596

Article

Zhu, J. H.^1,2  Lewis, M. J.¹  Du, S. W.²  Li, Y. T.² 

[1] Tennessee Technol Univ, Dept Mech Engn, Cookeville, TN 38501 USA

[2] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China

关键词: Solid oxide fuel cell;    Interconnect;    Protective coating;    Reactive element doping;    Electrolytic deposition;    Spinel;   

DOI  :  10.1016/j.tsf.2015.07.085

来源: Elsevier

【 摘 要 】

Reactive element-doped (Co,Mn)(3)O-4 spinel is considered as the most promising coating system to protect ferritic alloys for solid oxide fuel cell interconnect application. In this paper, a CeO2-doped (Co,Mn)(3)O-4 coating was synthesized on a Crofer 22 APU alloy substrate via electrolytic codeposition of a composite layer consisting of a Co matrix and embedded Mn3O4/CeO2 particles, followed by thermal conversion of the deposited layer in air at elevated temperatures. After oxidation at 800 degrees C in air for 250 h, no Cr penetration was detected in both the CeO2-doped and CeO2-free spinel coatings. However, CeO2 doping significantly reduced the Cr2O3 scale growth at the coating/substrate interface. An area specific resistance of 8 m Omega.cm(2) at 800 degrees C was achieved for the CeO2-doped coating sample, which was much lower than that of the CeO2-free coating sample (13 m Omega.cm(2)) or the bare substrate (24 m Omega.cm(2)) at the same temperature. CeO2 doping in the spinel coating also improved the performance stability of the anode-supported cell in contact with the alloy interconnect. (C) 2015 Elsevier B.V. All rights reserved.

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