NDLI: Evaluation of the Effect of Sulfur on the Performance of Nickel/Gadolinium‐Doped Ceria Based Solid Oxide Fuel Cell Anodes

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Evaluation of the Effect of Sulfur on the Performance of Nickel/Gadolinium‐Doped Ceria Based Solid Oxide Fuel Cell Anodes

Content Provider	Semantic Scholar
Author	Riegraf, Matthias Yurkiv, Vitaliy Costa, Rémi Schiller, G. Perdikakis A. Friedrich, Kaspar Andreas
Copyright Year	2017
Abstract	The focus of this study is the measurement and understanding of the sulfur poisoning phenomena of Ni/gadolinium-doped ceria (CGO) based solid oxide fuel cells (SOFC). Cells with Ni/CGO10 and NiCu5/CGO40 anodes were characterized by using impedance spectroscopy at different temperatures and H2 /H2 O fuel ratios. The short-term sulfur poisoning behavior was investigated systematically at temperatures of 800-950 °C, current densities of 0-0.75 A cm-2 , and H2 S concentrations of 1-20 ppm. A sulfur poisoning mitigation effect was observed at high current loads and temperatures. The poisoning behavior was reversible for short exposure times. It was observed that the sulfur-affected processes exhibited significantly different relaxation times that depend on the Gd content in the CGO phase. Moreover, it was demonstrated that the capacitance of Ni/CGO10 anodes is strongly dependent on the temperature and gas-phase composition, which reflects a changing Ce3+ /Ce4+ ratio.
Starting Page	587
Ending Page	599
Page Count	13
File Format	PDF HTM / HTML
PubMed reference number	27863123v1
Alternate Webpage(s)	https://doi.org/10.1002/cssc.201601320
DOI	10.1002/cssc.201601320
Journal	ChemSusChem
Volume Number	10
Language	English
Access Restriction	Open
Subject Keyword	Electric Capacitance Gadolinium DTPA Poisoning Sulfur density nickel part per million (ppm)
Content Type	Text
Resource Type	Article

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