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Comparative performance of anode-supported SOFCs using a thin Ce0.9Gd0.1O1.95 electrolyte with an incorporated BaCe0.8Y0.2O3-α layer in hydrogen and methane
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作者:

Tomita, A
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Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan

Teranishi, S
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机构: Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan

Nagao, M
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机构: Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan

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Sano, M
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机构: Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan
机构:
[1] Natl Inst Adv Ind Sci & Technol AIST, Nagoya, Aichi 4638560, Japan
[2] Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan
关键词:
D O I:
10.1149/1.2186184
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
Multilayered Ce0.9Gd0.1O1.95/ BaCe0.8Y0.2O3-alpha/ Ce0.9Gd0.1O1.95 (GDC/BCY/GDC) electrolytes were prepared by tape casting on a Ni - Ce0.8Sm0.2O1.9 anode support. The overall electrolyte thickness ranged from 30 to 35 mu m, including a 3 mu m thick BCY layer. When the multilayered electrolyte cell was tested with hydrogen at the anode and air at the cathode in the temperature range of 500 - 700 degrees C, it yielded open-circuit voltages (OCVs) of 846 - 1024 mV, which were higher than the OCVs of 753 - 933 mV obtained for a single-layered GDC electrolyte cell under the same conditions. The corresponding peak power densities reached 273, 731, and 1025 mW cm(-2) at 500, 600, and 700 degrees C, respectively. The multilayered electrolyte cell could also be applied to direct methane solid oxide fuel cell (SOFC) and single-chamber SOFC operating in a mixture of methane and air. These SOFCs yielded OCVs of 880 - 950 mV and reasonable power densities without coking. (C) 2006 The Electrochemical Society.
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页码:A956 / A960
页数:5
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