A Regenerative Coking and Sulfur Resistant Composite Anode with Cu Exsolution for Intermediate Temperature Solid Oxide Fuel Cells. Issue 9 (1st January 2018)

• Record Type: Journal Article
• Authors: Zhou, Ning; Yin, Yi-Mei; Chen, Zonghai; Song, Yefeng; Yin, Jiewei; Zhou, Ding; Ma, Zi-Feng
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 9(2018)
• Page Start: F629
• Page End: F634
• Publication Date: 2018-01-01
• Subjects: coking sulfur resistance -- regeneration -- solid oxide fuel cell; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0841809jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : A Cu exsolution based composite anode (R-LSFCNb) was prepared through reducing perovskite La0.5 Sr0.5 Fe0.8 Cu0.15 Nb0.05 O3-δ (LSFCNb) in H2 for intermediate temperature solid oxide fuel cells (IT-SOFC). The performance and stability of the anode in various fuels, as well as the regeneration possibility from coking in syngas were investigated. The anode showed highly catalytic activity to fuel oxidations by peak power density of 0.76, 0.64, and 0.71 W·cm −2 in wet H2 (3% H2 O), wet syngas (H2 :CO = 1, 3% H2 O), and H2 with 50 ppm H2 S, respectively, at 800°C in electrolyte supported full cells. Moreover, the anode was highly stable in wet H2, and exhibited H2 S and coking resistance during 100 h testing period under 0.7 V. In addition, the anode can be regenerated from carbon deposition in wet syngas through applying reodx cycles on it, the evolution and elimination of carbon deposition in the anode were studied and discussed.