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  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2011-08-30
Sub-type Article
DOI 10.1039/c1jm12660a
Volume number 21
Issue number 39
ISSN 0959-9428; 1364-5501
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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