Synthesis and characterization of a Sr0.95Y0.05TiO3-δ-based hydrogen electrode for reversible solid oxide cells

Handle URI:
http://hdl.handle.net/10754/563952
Title:
Synthesis and characterization of a Sr0.95Y0.05TiO3-δ-based hydrogen electrode for reversible solid oxide cells
Authors:
Ling, Yihan; Chen, Luyang; Lin, Bin; Yu, Weili; Isimjan, Tayirjan T.; Zhao, Ling; Liu, Xingqin
Abstract:
Reversible solid oxide cells (RSOCs) can generate electricity as solid oxide fuel cells (SOFC) facing a shortage of electricity and can also store the electricity as solid oxide electrolysis cells (SOEC) at the time of excessive electricity. The composite Sr0.95Y0.05TiO3-δ-Sm0.2Ce0.8O1.9 (SYT-SDC) as the hydrogen electrode provides a promising alternative for a conventional Ni/YSZ. The possible charge compensation mechanism of SYT is described as Sr0.95Y0.05Ti0.95-2δ 4+Ti2δ+0.05 3+O3-δ. The Ti3+ is approximately 11.73% in the reduced SYT by XRD Rietveld refinement, electron paramagnetic resonance (EPR) and thermogravimetry (TG) analysis. Voltage-current curves and impedance spectra are measured as a function of applied voltages to characterize the cells. The bulk resistance (Ro) and the electrode polarization resistance (Rp) at open circuit voltages (OCV) at 750 °C are 9.06 Ω cm2 and 10.57 Ω cm2, respectively. The Ro values have a small amount of changes with small slopes both in the SOFC (-0.29 Ω cm2 V-1) and SOEC mode (0.5 Ω cm2 V-1), whereas the Rp values decrease all the time with the increasing voltages at both the SOFC (-2.59 Ω cm2 V-1) and SOEC mode (-9.65 Ω cm2 V-1), indicating that the electrical conductivity and electro-catalytic property of the SYT-based hydrogen electrode can be improved under the SOEC mode. This journal is
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)
Publisher:
Royal Society of Chemistry (RSC)
Journal:
RSC Adv.
Issue Date:
2015
DOI:
10.1039/c4ra11973h
Type:
Article
ISSN:
20462069
Sponsors:
The authors wish to thank Japan Society for the Promotion of Science (JSPS) for financial support through a Post-doctoral Fellowship for Foreign Researchers and the financial support from Chinese Natural Science Foundation on contract no. 51102107.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLing, Yihanen
dc.contributor.authorChen, Luyangen
dc.contributor.authorLin, Binen
dc.contributor.authorYu, Weilien
dc.contributor.authorIsimjan, Tayirjan T.en
dc.contributor.authorZhao, Lingen
dc.contributor.authorLiu, Xingqinen
dc.date.accessioned2015-08-03T12:20:41Zen
dc.date.available2015-08-03T12:20:41Zen
dc.date.issued2015en
dc.identifier.issn20462069en
dc.identifier.doi10.1039/c4ra11973hen
dc.identifier.urihttp://hdl.handle.net/10754/563952en
dc.description.abstractReversible solid oxide cells (RSOCs) can generate electricity as solid oxide fuel cells (SOFC) facing a shortage of electricity and can also store the electricity as solid oxide electrolysis cells (SOEC) at the time of excessive electricity. The composite Sr0.95Y0.05TiO3-δ-Sm0.2Ce0.8O1.9 (SYT-SDC) as the hydrogen electrode provides a promising alternative for a conventional Ni/YSZ. The possible charge compensation mechanism of SYT is described as Sr0.95Y0.05Ti0.95-2δ 4+Ti2δ+0.05 3+O3-δ. The Ti3+ is approximately 11.73% in the reduced SYT by XRD Rietveld refinement, electron paramagnetic resonance (EPR) and thermogravimetry (TG) analysis. Voltage-current curves and impedance spectra are measured as a function of applied voltages to characterize the cells. The bulk resistance (Ro) and the electrode polarization resistance (Rp) at open circuit voltages (OCV) at 750 °C are 9.06 Ω cm2 and 10.57 Ω cm2, respectively. The Ro values have a small amount of changes with small slopes both in the SOFC (-0.29 Ω cm2 V-1) and SOEC mode (0.5 Ω cm2 V-1), whereas the Rp values decrease all the time with the increasing voltages at both the SOFC (-2.59 Ω cm2 V-1) and SOEC mode (-9.65 Ω cm2 V-1), indicating that the electrical conductivity and electro-catalytic property of the SYT-based hydrogen electrode can be improved under the SOEC mode. This journal isen
dc.description.sponsorshipThe authors wish to thank Japan Society for the Promotion of Science (JSPS) for financial support through a Post-doctoral Fellowship for Foreign Researchers and the financial support from Chinese Natural Science Foundation on contract no. 51102107.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleSynthesis and characterization of a Sr0.95Y0.05TiO3-δ-based hydrogen electrode for reversible solid oxide cellsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalRSC Adv.en
dc.contributor.institutionCAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China (USTC)Hefei Anhui, Chinaen
dc.contributor.institutionInstitute of Multidisciplinary Research for Advanced Materials, Tohoku UniversitySendai, Japanen
dc.contributor.institutionWorld Premier International (WPI), Advanced Institute for Materials Research, Tohoku UniversitySendai, Japanen
dc.contributor.institutionDepartment of Material Science and Chemistry, China University of GeoscienceWuhan, Chinaen
kaust.authorYu, Weilien
kaust.authorIsimjan, Tayirjan T.en
kaust.authorLin, Binen
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