Investigation of Electrochemical Properties of Model Lanthanum Strontium Cobalt Ferrite-Based Cathodes for Proton Ceramic Fuel Cells

被引：21
|
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
来源：
ELECTROCATALYSIS | 2016年 / 7卷 / 04期
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.
引用
收藏
页码：280 / 286
页数：7
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