Significant Promotion Effect of Bi2O3 on the Activity and Stability of Directly Assembled Lanthanum Manganite Based Cathodes of Solid Oxide Fuel Cells

Na Ai; Jean-Pierre Veder; Yi Cheng; Minle Chen; Kongfa Chen; Teng Zhang; San Ping Jiang

doi:10.1149/2.1581713jes

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Significant Promotion Effect of Bi2O3 on the Activity and Stability of Directly Assembled Lanthanum Manganite Based Cathodes of Solid Oxide Fuel Cells

Journal article

Peer reviewed

Significant Promotion Effect of Bi2O3 on the Activity and Stability of Directly Assembled Lanthanum Manganite Based Cathodes of Solid Oxide Fuel Cells

Na Ai, Jean-Pierre Veder, Yi Cheng, Minle Chen, Kongfa Chen, Teng Zhang and San Ping Jiang

Journal of the Electrochemical Society, Vol.164(13), pp.F1471-F1477

2017

DOI: https://doi.org/10.1149/2.1581713jes

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Abstract

Bismuth oxide exhibits extraordinary ionic conductivity and high surface exchange ability, but the low melting temperature and instability in reducing environment limits its wide application in intermediate temperature solid oxide fuel cells (IT-SOFCs). Herein, we incorporate yttria-stabilized bismuth oxide (YSB) as a promoter to enhance the electrocatalytic activity of directly assembled La0.76Sr0.19Mn0.95Pt0.05O3+δ (LSMPt) cathodes on yttria-stabilized zirconia (YSZ) electrolyte. The presence of YSB enhances the electrocatalytic activity of LSMPt for the oxygen reduction reaction (ORR) with significantly reduced activation energy of 127 kJ mol−1 for ORR, as compared to 171 kJ mol−1 for the reaction on pristine LSMPt cathode. An anode-supported YSZ film cell with the directly assembled LSMPt-YSB electrode exhibits a peak power density of 1.36 and 0.35 W cm−2 at 750 and 600°C, respectively and is stable with no degradation during the operation for over 200 h. Synchrotron near edge X-ray absorption fine structure spectroscopy (NEXAFS) and energy dispersive spectroscopy (EDS) reveal that the excellent performance and stability is owing to in situ formation of ionic conducting Mn-Bi containing particles or phase at the electrode/electrolyte interface under the influence of electrochemical polarization. The present study opens up a new avenue to apply the active bismuth oxide for the development of highly active and durable cathodes of IT-SOFCs.

Details

Title: Significant Promotion Effect of Bi2O3 on the Activity and Stability of Directly Assembled Lanthanum Manganite Based Cathodes of Solid Oxide Fuel Cells
Authors: Na Ai (Author) - Fuzhou University
Jean-Pierre Veder (Author) - Curtin University
Yi Cheng (Author) - Curtin University
Minle Chen (Author) - Fuzhou University
Kongfa Chen (Author) - Fuzhou University
Teng Zhang (Author) - Fuzhou University
San Ping Jiang (Author) - University of Sunshine Coast Faculty of Science, Health, Education and Engineering, , Australia
Publication details: Journal of the Electrochemical Society, Vol.164(13), pp.F1471-F1477; 1
Publisher: Electrochemical Society, Inc.
DOI: 10.1149/2.1581713jes
ISSN: 1945-7111
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99523208302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Electrochemistry; Materials Science, Coatings & Films

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