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Investigation of Electrochemical Properties of Model Lanthanum Strontium Cobalt Ferrite-Based Cathodes for Proton Ceramic Fuel Cells
被引:22
作者:
Yoo, Chung-Yul
[1
]
Yun, Dae Sik
[1
]
Park, Sun-Young
[1
,2
]
Park, Jaeku
[3
]
Joo, Jong Hoon
[4
]
Park, Haein
[5
]
Kwak, Minseok
[5
]
Yu, Ji Haeng
[1
]
机构:
[1] Korea Inst Energy Res, 152 Gajeong Ro, Daejeon 34129, South Korea
[2] SsangYong Mat Corp, 151 Seongseogongdannam Ro, Daegu 42721, South Korea
[3] Pohang Accelerator Lab, 80 Jigokro 127 Beongil, Pohang 37673, Gyeongbuk, South Korea
[4] Chungbuk Natl Univ, Dept Adv Mat Engn, 1 Chungdae Ro, Cheongju 28644, South Korea
[5] Pukyong Natl Univ, Dept Chem, 45 Yongso Ro, Busan 48513, South Korea
基金:
新加坡国家研究基金会;
关键词:
Proton ceramic fuel cell;
Composite cathode;
Proton-conducting phase;
Electrochemical reaction;
H+-SOFC CATHODES;
CONDUCTING ELECTROLYTES;
TRANSPORT-PROPERTIES;
COMPOSITE CATHODES;
IMPEDANCE SPECTRA;
PEROVSKITE;
OXIDES;
HYDRATION;
STEAM;
D O I:
10.1007/s12678-016-0306-1
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:
The electrochemical properties of La0.6Sr0.4Co0.2Fe0.8O3-delta-based cathodes are studied as model electrodes for proton ceramic fuel cells. The electrochemical performance of symmetric cells with porous cathodes (La0.6Sr0.4Co0.2Fe0.8O3-delta, La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta, and La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta), investigated as a function of oxygen and water partial pressures, follows the order La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta >= La0.6Sr0.4Co0.2Fe0.8O3-delta >> La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta. The results indicate that the cathode performance of La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta is enhanced mainly due to the extension of the effective triple phase boundary, whereas that of La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta is lowered due to the poor proton conductivity along the percolated BaZr0.8Y0.2O3-delta particles. From the observed oxygen partial pressure dependence, the rate-determining step of the above cathode polarization reaction is principally ascribed to the oxygen reduction reaction.
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页码:280 / 286
页数:7
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