Single crystalline La0.5Sr0.5MnO3 microcubes as cathode of solid oxide fuel cell

被引：90

作者：

Zhi, Mingjia ^{[1
,2
]}

Zhou, Guangwen ^{[3
]}

Hong, Zhanglian ^{[4
,5
]}

Wang, Jin ^{[1
,2
]}

Gemmen, Randall ^{[1
]}

Gerdes, Kirk ^{[1
]}

Manivannan, Ayyakkannu ^{[1
,2
]}

Ma, Dongling ^{[6
]}

Wu, Nianqiang ^{[1
,2
]}

机构：

[1] Natl Energy Technol Lab, Dept Energy, Morgantown, WV 26507 USA

[2] W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26506 USA

[3] SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA

[4] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[5] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[6] Inst Natl Rech Sci, INRS Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 01期

关键词：

OXYGEN REDUCTION; SURFACE; IMPEDANCE; ELECTRODE; PREDICTION; OXIDATION; KINETICS;

D O I：

10.1039/c0ee00300j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The efficiency of solid oxide fuel cells (SOFCs) is heavily dependent on the electrocatalytic activity of the cathode toward the oxygen reduction reaction (ORR). In order to achieve better cathode performance, single crystalline La0.5Sr0.5MnO3 (LSM) microcubes with the {200} facets have been synthesized by the hydrothermal method. It is found that the LSM microcubes exhibit lower polarization resistance than the conventional polycrystalline La0.8Sr0.2MnO3 powder in air from 700 degrees C to 900 degrees C. The ORR activation energy of the LSM microcubes is lower than that of the conventional powder. The ORR kinetics for the microcubes is limited by the charge transfer step while that for the conventional powder is dominated by the oxygen adsorption and dissociation on the cathode surface.

引用

页码：139 / 144

页数：6

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