An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells
Article
Article Title | An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells |
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ERA Journal ID | 1615 |
Article Category | Article |
Authors | Zhu, Yinlong (Author), Chen, Zhi-Gang (Author), Zhou, Wei (Author), Jiang, Shanshan (Author), Zou, Jin (Author) and Shao, Zongping (Author) |
Journal Title | ChemSusChem: chemistry and sustainability, energy and materials |
Journal Citation | 6 (12), pp. 2249-2254 |
Number of Pages | 6 |
Year | 2013 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 1864-5631 |
1864-564X | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/cssc.201300694 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/cssc.201300694/epdf |
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. |
Keywords | cathodes; fuel cells; oxygen reduction reaction; perovskites; solid-state reactions; high electrical conductivity; high operating temperature; Low operating temperature; Low-temperature solid oxide fuel cells; oxygen reduction reaction; oxygen vacancy concentration; solid oxide fuel cells (SOFCs); structural stabilities; cathodes; fuel cells; oxygen reduction reaction; perovskites; solid-state reactions; materials science; applied physics generally; ceramics; inorganic compounds; systems science; chemical reactions; electric components; fuel cells; thermodynamics; chemistry |
ANZSRC Field of Research 2020 | 400402. Chemical and thermal processes in energy and combustion |
349999. Other chemical sciences not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing University of Technology, China |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4175/an-a-site-deficient-perovskite-offers-high-activity-and-stability-for-low-temperature-solid-oxide-fuel-cells
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