A new cobalt-free composite cathode Pr0.6Sr0.4Cu0.2Fe0.8O3-δ-Ce0.8Sm0.2O2-δ for proton-conducting solid oxide fuel cells

被引：27
|
作者：
Gong, Zheng [1 ,2 ]
Hou, Jie [1 ,2 ]
Wang, Zhongtao [1 ,2 ]
Cao, Jiafeng [1 ,2 ]
Zhang, Junyu [1 ,2 ]
Liu, Wei [1 ,2 ,3 ]
机构：
[1] Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2015年 / 178卷
基金：
美国国家科学基金会;
关键词：
Cobalt-free; Pr0.6Sr0.4Cu0.2Fe0.8O3-delta-Ce0.8Sm0.2O2-delta; H-SOFC; Electrochemical performance; CHEMICAL-STABILITY; TEMPERATURE; PERFORMANCE; ELECTROLYTE; PERMEATION; PCMFCS;
D O I：
10.1016/j.electacta.2015.07.159
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Pr0.6Sr0.4Cu0.2Fe0.8O3-delta-Ce0.8Sm0.2O2-delta (PSCF-SDC) (70:30 wt.%), a new cobalt-free composite cathode, is investigated for BaZr0.3Ce0.5Y0.2O3-delta-based proton-conducting solid oxide fuel cells (H-SOFCs). The influence of firing temperature on cathode microstructure and electrochemical performance of fuel cells is researched and analyzed. These results show that the optimum sintering temperature of PSCF-SDC composite cathode is 800 degrees C. The low polarization resistance of 0.14 Omega cm(2) and the maximum power density of 456 mW cm(-2) are achieved at 650 degrees C. Cell performance is further enhanced when the BaZr0.3Ce0.5Y0.2O3-delta electrolyte is replaced by BaZr0.1Ce0.7Y0.2O3-delta with higher proton conductivity; resulting in an improved maximum power density of 556 mW cm(-2) at 650 degrees C. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：60 / 64
页数：5
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