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Evaluation of the effect of sulfur on the performance of Ni/CGO-based solid oxide fuel cell (SOFC) anodes

Riegraf, Matthias and Yurkiv, Vitaliy and Costa, Rémi and Schiller, Günter and Friedrich, K. Andreas (2017) Evaluation of the effect of sulfur on the performance of Ni/CGO-based solid oxide fuel cell (SOFC) anodes. ChemSusChem (10), pp. 587-599. Wiley. DOI: 10.1002/cssc.201601320 ISSN 1864-5631

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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/H2O fuel ratios. The short-term sulfur poisoning behavior was investigated systematically at temperatures of 800–9508C, current densities of 0–0.75 Acm@2, and H2S 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.

Item URL in elib:https://elib.dlr.de/107781/
Document Type:Article
Title:Evaluation of the effect of sulfur on the performance of Ni/CGO-based solid oxide fuel cell (SOFC) anodes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Riegraf, MatthiasdlrUNSPECIFIED
Yurkiv, Vitaliyvitaliy.yurkiv (at) dlr.deUNSPECIFIED
Costa, Rémiremi.costa (at) dlr.deUNSPECIFIED
Schiller, Günterguenter.schiller (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:11 February 2017
Journal or Publication Title:ChemSusChem
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1002/cssc.201601320
Page Range:pp. 587-599
Publisher:Wiley
ISSN:1864-5631
Status:Published
Keywords:electrochemistry fuel cells gadolinium nickel sulfur
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Riegraf, Matthias
Deposited On:24 Nov 2017 13:58
Last Modified:23 Feb 2019 00:21

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