Low temperature processed MnCo2O4 and MnCo1.8Fe0.2O4 as effective protective coatings for solid oxide fuel cell interconnects at 750 °C

JOURNAL OF POWER SOURCES

卷:336

Article

Molin, S.¹  Jasinski, P.²  Mikkelsen, L.¹  Zhang, W.³  Chen, M.¹  Hendriksen, P. V.¹ 

[1] Tech Univ Denmark, Dept Energy Convers & Storage, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

[2] Gdansk Univ Technol, Fac Elect Telecommun & Informat, Narutowicza 11-12, PL-80233 Gdansk, Poland

[3] Jilin Univ, Sch Mat Sci & Engn, 2699 Qianjin St, Changchun 130012, Peoples R China

关键词: Protective coating;    High temperature corrosion;    Solid oxide fuel cell;    Interconnect;    Spinel;    Electrical conductivity;   

DOI  :  10.1016/j.jpowsour.2016.11.011

来源: Elsevier

【 摘 要 】

In this study two materials, MnCo2O4 and MnCo1.8Fe0.2O4 are studied as potential protective coatings for Solid Oxide Fuel Cell interconnects working at 750 degrees C. First powder fabrication by a modified Pechini method is described followed by a description of the coating procedure. The protective action of the coating applied on Crofer 22 APU is evaluated by following the area specific resistance (ASR) of the scale/ coating for 5500 h including several thermal cycles. The coating is prepared by brush painting and has a porous structure after deposition. Post mortem microstructural characterization performed on the coated samples shows good protection against chromium diffusion from the chromia scale ensured by a formation of a dense reaction layer. This study shows, that even without high temperature sintering and/or reactive sintering it is possible to fabricate protective coatings based on MnCo spinels. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free