Fabrication and optimization of La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ electrode for symmetric solid oxide fuel cell with zirconia based electrolyte
Fabrication and optimization of La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ electrode for symmetric solid oxide fuel cell with zirconia based electrolyte
复制标题
氧化锆基电解质对称固体氧化物燃料电池La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ电极的制备与优化
DOI：
10.1016/j.jmst.2017.03.012
复制
发表时间：
2017-11-01
影响因子：
10.9
通讯作者：
Han, Minfang
中科院分区：
文献类型：
--
作者：
Xu, Na;Zhu, Tenglong;Han, Minfang
采用La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-delta（LSCFN）作为对称固体氧化物燃料电池（SSOFC）的阳极和阴极。采用流延法和丝网印刷法制作了LSCFN电极电池。通过对电极和电解液共烧和分烧工艺的比较，优化了制备工艺。为了进一步改善LSCFN电极性能，将氧离子导体Gd0.1Ce0.9O2-δ（GDC）添加到LSCFN电极中。发现LSCFN-GDC复合电极的优选组成为重量比为1：1，在800 ℃下的极化电阻为0.16 Ω cm（2）。LSCFN-GDC并联GDC/YSZ/GDC并联LSCFN-GDC在含3%H2O的H-2和CH 4中测试的最大功率密度在850 ℃时分别为395 mW cm（-2）和124 mW cm（-2），这远高于相同条件下LSCFN并联GDC/YSZ/GDC并联LSCFN电池的最大功率密度，这可能是由于添加GDC引起的三相边界的扩展。电池显示出合理的稳定性，使用H-2和CH 4与3%H2O作为燃料，并没有观察到显着的功率输出下降后，总的200小时的操作。(C)2017由Elsevier Ltd代表Journal of Materials Science & Technology编辑部出版。
La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-delta (LSCFN) was applied as both anode and cathode for symmetrical solid oxide fuel cells (SSOFCs) with zirconia based electrolyte. The cell with LSCFN electrode was fabricated by tape-casting and screen printing. Fabrication process was optimized firstly by comparing co-sintering and separate-sintering of electrode and electrolyte. To further improve the LSCFN electrode properties, oxygen ionic conductor of Gd0.1Ce0.9O2-delta (GDC) was added into the LSCFN electrode. The preferred composition of LSCFN-GDC composite electrode was found to be 1: 1 in weight ratio with polarization resistance of 0.16 Omega cm(2) at 800 degrees C. The maximum power densities of LSCFN-GDC parallel to GDC/YSZ/GDC parallel to LSCFN-GDC tested in H-2 and CH4 with 3% H2O were 395 mW cm(-2) and 124 mW cm(-2) at 850 degrees C, respectively, which were much higher than that of LSCFN parallel to GDC/YSZ/GDC parallel to LSCFN cells at same condition, possibly due to the extension of the triple phase boundary induced by the addition of GDC. The cell showed reasonable stability using H-2 and CH4 with 3% H2O as fuels and no significant power output degradation was observed after total 200 h operation. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.