An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells

Zhu, Yinlong, Chen, Zhi-Gang, Zhou, Wei, Jiang, Shanshan, Zou, Jin and Shao, Zongping (2013) An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells. ChemSusChem, 6 12: 2249-2254. doi:10.1002/cssc.201300694


Author Zhu, Yinlong
Chen, Zhi-Gang
Zhou, Wei
Jiang, Shanshan
Zou, Jin
Shao, Zongping
Title An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells
Journal name ChemSusChem   Check publisher's open access policy
ISSN 1864-5631
1864-564X
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1002/cssc.201300694
Open Access Status Not Open Access
Volume 6
Issue 12
Start page 2249
End page 2254
Total pages 6
Place of publication Weinheim, Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Language eng
Subject 2100 Energy
2304 Environmental Chemistry
2500 Materials Science
1500 Chemical Engineering
Abstract Solid oxide fuel cells (SOFCs) directly convert fossil and/or renewable fuels into electricity and/or high-quality heat in an environmentally friendly way. However, high operating temperatures result in high cost and material issues, which have limited the commercialization of SOFCs. To lower their operating temperatures, highly active and stable cathodes are required to maintain a reasonable power output. Here, we report a layer-structured A-site deficient perovskite Sr0.95Nb0.1Co0.9O 3-δ (SNC0.95) prepared by solid-state reactions that shows not only high activity towards the oxygen reduction reaction (ORR) at operating temperatures below 600 °C, but also offers excellent structural stability and compatibility, and improved CO2 resistivity. An anode-supported fuel cell with SNC0.95 cathode delivers a peak power density as high as 1016mW cm-2 with an electrode-area-specific resistance of 0.052Ω cm2 at 500 °C. A site to be seen: The perovskite Sr 0.95Nb0.1Co0.9O3-δ (SNC0.95) with A-site deficiencies shows high activity towards the oxygen reduction reaction (ORR) at low operating temperatures due to its large oxygen vacancy concentration and high electrical conductivity. Moreover, SNC0.95 shows excellent structural stability and chemical compatibility‥ The CO2 resistivity is also improved. These merits show that SNC0.95 is a promising cathode material for low-temperature solid oxide fuel cells. Copyright
Keyword Cathodes
Fuel Cells
Oxygen reduction reaction
Perovskites
Solid state reactions
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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