Design of a dual-layer ceramic interconnect based on perovskite oxides for segmented-in-series solid oxide fuel cells

被引:26
|
作者
Park, Beom-Kyeong [1 ,2 ]
Kim, Dae-Wi [1 ]
Song, Rak-Hyun [1 ]
Lee, Seung-Bok [1 ]
Lim, Tak-Hyoung [1 ]
Park, Seok-Joo [1 ]
Park, Chong-Ook [2 ]
Lee, Jong-Won [1 ,3 ]
机构
[1] Korea Inst Energy Res, New & Renewable Energy Res Div, Taejon 305343, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[3] Korea Univ Sci & Technol, Dept Adv Energy Technol, Taejon 305350, South Korea
关键词
Solid oxide fuel cell; Segmented-in-series; Interconnect; Perovskite; Coating; CATHODE; PERFORMANCE; STACK; CO; ELECTROLYTE;
D O I
10.1016/j.jpowsour.2015.09.082
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A segmented-in series (SIS) SOFC consists of segmented unit cells connected in electrical series and shows improved stack efficiency over conventional SOFCs. In this design, a thin interconnect film provides both electrical contact and sealing between the anode of one cell and the cathode of the next; thus, it should have high conductivity and chemical/structural stability in both reducing and oxidizing atmospheres as well as impermeability to gases. Here, we report a dual-layer interconnect film for SIS -SOFCs comprising perovskite-type oxides, Sr0.7La0.2TiO3 (exposed to a reducing atmosphere) and La0.8Sr0.2FeO3 (exposed to an oxidizing atmosphere). The interconnect film is not only very dense but also highly conductive and stable under SOFC operating conditions; in particular, it shows an area-specific resistance of 19.6 m Omega cm(2) at 800 similar to degrees C, which is much lower than the generally accepted limit for SOFCs. A flat-tubular SIS-SOFC fabricated using these interconnect films exhibits a power density as high as 340 mW cm(-2), which proves the feasibility of the dual-layer interconnect design. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:318 / 324
页数:7
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