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dc.contributor.authorMa, Jianjun
dc.contributor.authorJiang, Cairong
dc.contributor.authorConnor, Paul Alexander
dc.contributor.authorCassidy, Mark
dc.contributor.authorIrvine, John Thomas Sirr
dc.identifier.citationMa , J , Jiang , C , Connor , P A , Cassidy , M & Irvine , J T S 2015 , ' Highly efficient, coking-resistant SOFCs for energy conversion using biogas fuels ' , Journal of Materials Chemistry A , vol. 3 , no. 37 , pp. 19068-19076 .
dc.identifier.otherPURE: 210566175
dc.identifier.otherPURE UUID: da9afd14-9535-4179-a490-b3465f765f30
dc.identifier.otherScopus: 84941670334
dc.identifier.otherORCID: /0000-0002-1492-7590/work/60427208
dc.identifier.otherWOS: 000361553100033
dc.identifier.otherORCID: /0000-0002-8394-3359/work/68280834
dc.descriptionThe authors would like to thank the EPSRC-DST India-UK Collaborative Research Initiative in Fuel Cells project EPI037016/1 “Advancing Biogas through Fuel Flexible SOFC” for funding this work. JI acknowledges the Royal Society for a Wolfson merit award.en
dc.description.abstractSolid oxide fuel cells (SOFCs) afford an opportunity for the direct electrochemical conversion of biogas with high efficiency; however, direct utilisation of biogas in nickel-based SOFCs is a challenge as it is subject to carbon deposition. A biogas composition representative of a real operating system of 36% CH4, 36% CO2, 20% H2O, 4% H2 and 4% CO used here was derived from an anode recirculation method. A BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BCZYYb) infiltrated Ni-YSZ anode was investigated for biogas conversion. The infiltration of BCZYYb significantly promoted the electrochemical reactions and the cells exhibited high power output at the operational temperatures of 850, 800 and 750 °C. At 800 °C, supplied with a 20 ml min−1 biogas, the cell with a BCZYYb-Ni-YSZ anode, generated 1.69 A cm−2 at 0.8 V with an optimal amount of 0.6 wt% BCZYYb, whereas only 0.65 A cm−2 was produced with a non-infiltrated Ni-YSZ in the same conditions. At 750 °C, a maximum power density of 1.43 W cm−2 was achieved on a cell with a BCZYYb-Ni-YSZ anode, a 3 μm dense YSZ film electrolyte, a Gd0.1Ce0.9O2 (GDC) buffer layer and a La0.6Sr0.4Co0.2Fe0.8O3–Gd0.1Ce0.9O2 (LSCF-GDC) composite cathode. The cell remained stable, while operating at 0.8 V for 50 hours with a current density of 1.25 A cm−2. A well-designed cell structure and selected components made it possible to obtain excellent performance at good fuel utilisation. The analysis of gases in open-circuit conditions or under various current loads suggested that the prevalent reaction was reforming of methane without coking. This study demonstrates that the BCZYYb-Ni-YSZ is a promising electrode for carbon-containing fuel.
dc.relation.ispartofJournal of Materials Chemistry Aen
dc.rightsOpen Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.en
dc.subjectQD Chemistryen
dc.titleHighly efficient, coking-resistant SOFCs for energy conversion using biogas fuelsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews.St Andrews Sustainability Instituteen
dc.description.statusPeer revieweden

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