The effect of oxygen transfer mechanism on the cathode performance based on proton-conducting solid oxide fuel cells

Handle URI:
http://hdl.handle.net/10754/563939
Title:
The effect of oxygen transfer mechanism on the cathode performance based on proton-conducting solid oxide fuel cells
Authors:
Hou, Jie; Qian, Jing; Bi, Lei; Gong, Zheng; Peng, Ranran; Liu, Wei
Abstract:
Two types of proton-blocking composites, La2NiO4+δ-LaNi0.6Fe0.4O3-δ (LNO-LNF) and Sm0.2Ce0.8O2-δ-LaNi0.6Fe0.4O3-δ (SDC-LNF), were evaluated as cathode materials for proton-conducting solid oxide fuel cells (H-SOFCs) based on the BaZr0.1Ce0.7Y0.2O3-δ (BZCY) electrolyte, in order to compare and investigate the influence of two different oxygen transfer mechanism on the performance of the cathode for H-SOFCs. The X-ray diffraction (XRD) results showed that the chemical compatibility of the components in both compounds was excellent up to 1000°C. Electrochemical studies revealed that LNO-LNF showed lower area specific polarization resistances in symmetrical cells and better electrochemical performance in single cell tests. The single cell with LNO-LNF cathode generated remarkable higher maximum power densities (MPDs) and lower interfacial polarization resistances (Rp) than that with SDC-LNF cathode. Correspondingly, the MPDs of the single cell with the LNO-LNF cathode were 490, 364, 266, 180 mW cm-2 and the Rp were 0.103, 0.279, 0.587, 1.367 Ω cm2 at 700, 650, 600 and 550°C, respectively. Moreover, after the single cell with LNO-LNF cathode optimized with an anode functional layer (AFL) between the anode and electrolyte, the power outputs reached 708 mW cm-2 at 700°C. These results demonstrate that the LNO-LNF composite cathode with the interstitial oxygen transfer mechanism is a more preferable alternative for H-SOFCs than SDC-LNF composite cathode with the oxygen vacancy transfer mechanism.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. A
Issue Date:
2015
DOI:
10.1039/c4ta04397a
Type:
Article
ISSN:
20507488
Sponsors:
This work was supported by Ministry of Science and Technology of China (Grant no.: 2012CB215403). The project was also supported by the National Science Foundations of China (Grant nos: 51472228 and 21406190).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHou, Jieen
dc.contributor.authorQian, Jingen
dc.contributor.authorBi, Leien
dc.contributor.authorGong, Zhengen
dc.contributor.authorPeng, Ranranen
dc.contributor.authorLiu, Weien
dc.date.accessioned2015-08-03T12:20:14Zen
dc.date.available2015-08-03T12:20:14Zen
dc.date.issued2015en
dc.identifier.issn20507488en
dc.identifier.doi10.1039/c4ta04397aen
dc.identifier.urihttp://hdl.handle.net/10754/563939en
dc.description.abstractTwo types of proton-blocking composites, La2NiO4+δ-LaNi0.6Fe0.4O3-δ (LNO-LNF) and Sm0.2Ce0.8O2-δ-LaNi0.6Fe0.4O3-δ (SDC-LNF), were evaluated as cathode materials for proton-conducting solid oxide fuel cells (H-SOFCs) based on the BaZr0.1Ce0.7Y0.2O3-δ (BZCY) electrolyte, in order to compare and investigate the influence of two different oxygen transfer mechanism on the performance of the cathode for H-SOFCs. The X-ray diffraction (XRD) results showed that the chemical compatibility of the components in both compounds was excellent up to 1000°C. Electrochemical studies revealed that LNO-LNF showed lower area specific polarization resistances in symmetrical cells and better electrochemical performance in single cell tests. The single cell with LNO-LNF cathode generated remarkable higher maximum power densities (MPDs) and lower interfacial polarization resistances (Rp) than that with SDC-LNF cathode. Correspondingly, the MPDs of the single cell with the LNO-LNF cathode were 490, 364, 266, 180 mW cm-2 and the Rp were 0.103, 0.279, 0.587, 1.367 Ω cm2 at 700, 650, 600 and 550°C, respectively. Moreover, after the single cell with LNO-LNF cathode optimized with an anode functional layer (AFL) between the anode and electrolyte, the power outputs reached 708 mW cm-2 at 700°C. These results demonstrate that the LNO-LNF composite cathode with the interstitial oxygen transfer mechanism is a more preferable alternative for H-SOFCs than SDC-LNF composite cathode with the oxygen vacancy transfer mechanism.en
dc.description.sponsorshipThis work was supported by Ministry of Science and Technology of China (Grant no.: 2012CB215403). The project was also supported by the National Science Foundations of China (Grant nos: 51472228 and 21406190).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleThe effect of oxygen transfer mechanism on the cathode performance based on proton-conducting solid oxide fuel cellsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJ. Mater. Chem. Aen
dc.contributor.institutionCAS Key Laboratory of Materials for Energy Conversion, Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of ChinaHefei, Chinaen
dc.contributor.institutionKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of SciencesHefei, Chinaen
kaust.authorBi, Leien
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