Performance and stability in H2S of SrFe0.75Mo0.25O3-δ as electrode in proton ceramic fuel cells

被引：14
|
作者：
Wachowski, S. [1 ,2 ]
Li, Z. [3 ]
Polfus, J. M. [3 ]
Norby, T. [2 ]
机构：
[1] Gdansk Univ Technol, Dept Solid State Phys, Fac Appl Phys & Math, Ul Narutowicza 11-12, PL-80233 Gdansk, Poland
[2] Univ Oslo, FERMiO, Ctr Mat Sci & Nanotechnol, Dept Chem, Gaustadalleen 21, NO-0349 Oslo, Norway
[3] SINTEF Mat & Chem, POB 124 Blindern, NO-0314 Oslo, Norway
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 01期
关键词：
Proton ceramic fuel cells (PCFC); Sulfur tolerance; H2S; Strontium ferrite; Barium zirconate; STRUCTURAL FEATURES; STRONTIUM FERRITES; SYMMETRICAL SOFCS; BARIUM ZIRCONATE; ANODE MATERIALS; SULFUR; BIOGAS; TRANSPORT; HYDROGEN; DESULFURIZATION;
D O I：
10.1016/j.jeurceramsoc.2017.08.020
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The H2S-tolerance of SrFe0.25Mo0.25O3-delta (SFM) electrodes has been investigated in symmetric proton ceramic fuel cells (PCFC) with BaZr0.8Ce0.1Y0.1O3-delta (BZCY81) electrolyte. The ionic conductivity of the electrolyte under wet reducing conditions was found to be insignificantly affected in the presence of up to 5000 ppm H2S. The fuel cell exhibited an OCV of about 0.9 V at 700 degrees C, which dropped to about 0.6 V and 0.4 V upon exposure to 500 and 5000 ppm H2S, respectively, on the fuel side. Post characterization of the fuel cell revealed significant degradation of the anode in terms of microstructure and chemical composition due to formation of sulfides such as SrS, MoS2 and Fe3S4. Nevertheless, the fuel cell was still functional due to the sufficient electronic conductivity of some of these sulfides.
引用
收藏
页码：163 / 171
页数：9
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