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Liu, Meilin
Liu Research Group
Research Interests
  • Fuel Cells
  • Batteries
  • Supercapacitors
  • Sensors


New insights into sulfur poisoning behavior of Ni-YSZ anode from long-term operation of anode-supported SOFCs

DC Field Value Language Yang, Lei ko Cheng, Zhe ko Liu, Meilin ko Wilson, Lane ko 2014-11-24T00:03:31Z - 2014-11-21 ko 2010-11 -
dc.identifier.citation ENERGY & ENVIRONMENTAL SCIENCE, v.3, no.11, pp.1804 - 1809 ko
dc.identifier.issn 1754-5692 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract The performance characteristics of high-performance Ni-YSZ (yttria-stabilized zirconia) anode-supported solid oxide fuel cells (SOFCs) are examined under typical fuel cell operating conditions over a period of ∼3000 h when hydrogen contaminated with different concentrations of H2S was used as the fuel. Analyses reveal some new insights into the sulfur poisoning behavior of a Ni-YSZ anode. First, an initial drop in power output upon exposure to H2S-contaminated fuels is more dramatic in an anode-supported cell (with small cell resistance) than in electrolyte-supported cell (with large cell resistance), creating an illusion that a high-performance cell appears to be less sulfur tolerant than a low-performance cell. Second, the transition time for this rapid performance drop to cease is much longer for an anode-supported cell (with a thicker anode) than an electrolyte-supported cell (with a thinner anode). Third, the degree of sulfur poisoning (or the cell resistance increase due to sulfur poisoning) diminishes with operating cell current density, suggesting that the water produced at the active sites on anode surface from electro-oxidation of hydrogen (or oxygen ions) may promote the oxidation and removal of adsorbed sulfur. This effect becomes less pronounced at higher concentration of H2S, but still significant at ∼1 ppm of H2S. Fourth, the subsequent slow degradation in performance after the rapid performance drop upon initial exposure to H2S can be avoided, indicating that the previously reported slow degradation is unlikely the inherent behavior of a Ni-YSZ anode, but associated with other complications. This further implies that sulfur poisoning may be reversible and the performance drop could be fully recovered when the fuel is switched back to clean hydrogen. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.subject Active site ko
dc.subject Adsorbed sulfur ko
dc.subject Anode supported cell ko
dc.subject Anode surfaces ko
dc.subject Anode-supported ko
dc.subject Anode-supported SOFCs ko
dc.subject Cell resistance ko
dc.subject Contaminated fuels ko
dc.subject Electrolyte-supported cells ko
dc.subject High-performance cell ko
dc.subject Long-term operation ko
dc.subject Ni-YSZ anode ko
dc.subject Operating cells ko
dc.subject Operating condition ko
dc.subject Oxygen ions ko
dc.subject Performance characteristics ko
dc.subject Power out put ko
dc.subject Slow degradation ko
dc.subject Sulfur poisoning ko
dc.subject Transition time ko
dc.title New insights into sulfur poisoning behavior of Ni-YSZ anode from long-term operation of anode-supported SOFCs ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-78149260672 ko
dc.identifier.wosid 000283602400020 ko
dc.type.rims ART ko
dc.description.wostc 23 *
dc.description.scopustc 19 * 2015-05-06 * 2014-11-21 *
dc.identifier.doi 10.1039/c0ee00386g ko
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