A new cathode for solid oxide fuel cells capable of in situ electrochemical regeneration

Zhou, Wei, Shao, Zongping, Liang, Fengli, Chen, Zhi-Gang, Zhu, Zhonghua, Jin, Wanqin and Xu, Nanping (2011) A new cathode for solid oxide fuel cells capable of in situ electrochemical regeneration. Journal of Materials Chemistry, 21 39: 15343-15351.


Author Zhou, Wei
Shao, Zongping
Liang, Fengli
Chen, Zhi-Gang
Zhu, Zhonghua
Jin, Wanqin
Xu, Nanping
Title A new cathode for solid oxide fuel cells capable of in situ electrochemical regeneration
Journal name Journal of Materials Chemistry   Check publisher's open access policy
ISSN 0959-9428
1364-5501
Publication date 2011-08-30
Sub-type Article (original research)
DOI 10.1039/c1jm12660a
Volume 21
Issue 39
Start page 15343
End page 15351
Total pages 9
Place of publication Cambridge, U.K.
Publisher Royal Society of Chemistry
Collection year 2012
Language eng
Formatted abstract As highly efficient energy conversion devices with the capability for power/heat co-generation and fuel flexibility, solid-oxide fuel cells (SOFCs) have received considerable attention recently as a keystone of the future energy economy. Nowadays, lack of a proper cathode with high performance at intermediate temperature (IT) has become the main obstacle in realizing this fascinating technology. Here we present (La0.8Sr0.2)0.95Ag0.05MnO3−δ as a novel CO2 tolerant cathode of IT-SOFCs, which shows silver intercalation/de-intercalation capability. Under cathodic polarization, silver can be extracted from perovskite lattice to form a 5–15 nm silver modified A-site cation deficient (La0.8Sr0.2)0.95MnO3−δ electrode with superior electrocatalytic activity and improved stability. Any performance degradation due to silver sintering can be easily in situ restored by re-intercalating silver into the perovskite lattice under anodic polarization. Through electrochemically adjusting the oxidation state and location of silver, we introduce a way for the development of high-performance silver-modified cathode for IT-SOFCs, which may contribute significantly to a sustainable future.
Keyword Thermal-decomposition
Temperature
Oxygen
Electrodes
Silver
Anode
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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