LSCF-SDC core-shell high-performance durable composite cathode

被引：53

作者：

Lee, Seungho ^{[1
]}

Song, Hwa Seob ^{[1
]}

Hyun, Sang Hoon ^{[1
]}

Kim, Joosun ^{[2
]}

Moon, Jooho ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[2] Korea Inst Sci & Technol, Ctr Energy Mat Res, Seoul 136791, South Korea

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 01期

关键词：

Cathode; Durability; Composite; Core-shell particles; Solid oxide fuel cell; IMPEDANCE;

D O I：

10.1016/j.jpowsour.2009.06.079

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：

Core-shell type La0.6Sr0.4Co0.2Fe0.8O3-d (LSCF)-Sm0.2Ce0.8O2-d (SDC) powders are synthesized to achieve a high-performance durable cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The SDC core size is controlled so that all core particles are surrounded by the LSCF particles with no unattached spots. Such a core-shell composite cathode develops an ideal microstructure with improved phase contiguity, homogeneity, and maximized triple-phase boundary density. The cathode that involves an SDC core of 500 nm exhibits the lowest interfacial polarization resistance (0.265 Omega cm(2) at 650 degrees C), as well as long-term stability during both thermo-cyclic and electrochemically accelerated tests. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：118 / 123

页数：6

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