Numerical simulation of La0.6Sr0.4Co0.2Fe0.8O3Gd0.1Ce0.9O1.95 composite cathodes with micro pillars

被引：22

作者：

He, An ^{[1
]}

Shimura, Takaaki ^{[1
]}

Gong, Jiaming ^{[1
]}

Shikazono, Naoki ^{[1
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 13期

基金：

日本科学技术振兴机构;

关键词：

Solid oxide fuel cell cathode; Three-dimensional numerical simulation; Reactive region; GDC pillar; Pure LSCF cathode; LSCF-GDC composite cathode; FUEL-CELL ELECTRODES; 3-DIMENSIONAL RECONSTRUCTION; HYDROGEN-PRODUCTION; OXYGEN-TRANSPORT; HIGH-PERFORMANCE; IT-SOFC; MICROSTRUCTURE; CONDUCTIVITY; DEGRADATION; OPERATION;

D O I：

10.1016/j.ijhydene.2019.01.171

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：

In the current study, electrochemical performances of La0.6Sr0.4Co0.2Fe0.8O3-Gd0.1Ce0.9O1.95 (LSCF-GDC) composite cathode microstructures are numerically simulated in order to clarify the effects of GDC pillar which is introduced to enhance the effective ionic conductivity of the solid oxide fuel cell (SOFC) cathode. The numerical simulation is carried out based on the three-dimensional microstructure reconstructed with focused ion beam scanning electron microscopy (FIB-SEM). In order to further investigate the characteristics of the GDC pillars, we examine the electrochemical effects of GDC pillars inside the pure LSCF and LSCF-GDC composite cathode microstructures with different particle sizes. According to the simulation results, the GDC pillars effectively improve the performance of the pure LSCF cathode, and the improvements by the GDC pillars are more pronounced in the microstructures with small particle sizes. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6871 / 6885

页数：15

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