Journal
MATERIALS LETTERS
Volume 208, Issue -, Pages 54-57Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.05.056
Keywords
Ceramics; Powder technology; Energy storage and conversion; Electrical properties
Funding
- National Natural Science Foundation of China [51602343]
- Natural Science Foundation of Jiangsu Province in China [BK20160271]
- China Postdoctoral Science Foundation [2016M600449]
- Program for Innovation Research Team of CUMT in China [2015QN004]
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A highly active anode functional layer NiTiO3-Sm0.2Ce0.8O1.9 (NTO-SDC) is proposed to improve electrochemical performance of intermediate temperature solid oxide fuel cells (IT-SOFCs) with carbontolerant Ni-TiO2-delta anode. When exposing to the H-2 atmosphere, NTO in both anode support and anode functional layer can be totally reduced to Ni and TiO2-delta. Meanwhile, a small amount of Sm2Ti2O7 pyrochlore structure phase owning acceptable oxygen-ion conduction can be observed after high temperature sintering at 1250 degrees C. Maximum power densities of anode-supported NTO/NTO-SDC/SDC/La0.8Sr0.2Co0.2Fe0.8O3-delta (LSCF)-SDC single cells, are 338 mWcm(-2) and 223 mWcm(-2) with wet H-2 and methane fuels at 700 degrees C, respectively. Short-time stability test for anode-supported cells with NTO-SDC anode functional layer shows no obvious degradation with discharging at 0.5 V in wet methane fuel. Preliminary results have demonstrated that fabricating an anode functional layer of NTO-SDC is a facile and efficient strategy to improve electrochemical performance of IT-SOFCs with carbon-tolerant anode. (C) 2017 Elsevier B.V. All rights reserved.
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