Improvement of output performance of solid oxide fuel cell by optimizing the active anode functional layer

被引:53
|
作者
Chen, Xi [1 ]
Lin, Jie [3 ,4 ]
Sun, Le [3 ,4 ]
Liu, Tong [1 ,2 ,3 ,4 ]
Wu, Jiajia [1 ]
Sheng, Zhongyi [1 ]
Wang, Yao [1 ,2 ]
机构
[1] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China
[2] Wuhan Univ, Suzhou Inst, Suzhou 215123, Jiangsu, Peoples R China
[3] Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
[4] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
Phase inversion co-tape casting; Solid oxide fuel cell; Anode functional layer; Triple-phase boundary; Bilayer anode; STRAIGHT OPEN PORES; STEAM ELECTROLYSIS; TEMPERATURE; CATHODE; COMPOSITE; SUPPORT; FABRICATION; MEMBRANES; SOFCS; MICROSTRUCTURE;
D O I
10.1016/j.electacta.2018.12.078
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
In this work, the effects of an anode functional layer (AFL) with various thicknesses on the physical properties of anode and the electrochemical performance of the anode-supported solid oxide fuel cells (SOFCs) have been systematically studied. Four anode-supported cells with controllable AFL thicknesses have been fabricated by the combined phase-inversion co-tape casting method, screen-printing and dip-coating method. An optimal thickness of the AFL of 7.6 mu m is determined by the experimental results including the physical properties and electrochemical performance, and cell performance is significantly enhanced after the introduction of the AFL, which is ascribed to the remarkably increased triple-phase boundaries induced by the AFL. The bilayer anode-supported cells with 7.6 mm thick AFL exhibit a peak power density of 0.906 Wcm(-2) and a total resistance of 0.47 Omega cm(2) at 700 degrees C when the anode and the cathode are exposed a humidified H-2 (3 vol% H2O) and ambient air, respectively. Additionally, when the anode side is fed with the diluted H-2 (3 vol% H2O-97 vol% (10% H-2-90% N-2)), an excellent peak power density of 0.558 Wcm(-2) is still achieved. These results demonstrate that the bilayer anode is a suitable candidate for high-performance SOFC applications, especially at a low hydrogen concentration. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:112 / 120
页数:9
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