Issue 1, 2011
From the journal:

Energy & Environmental Science

Single crystalline La0.5Sr0.5MnO3 microcubes as cathode of solid oxidefuel cell†

Mingjia Zhi,ab   Guangwen Zhou,c   Zhanglian Hong,d   Jin Wang,ab   Randall Gemmen,a   Kirk Gerdes,a   Ayyakkannu Manivannan,ab   Dongling Mae  and  Nianqiang Wu*ab  

* Corresponding authors

a National Energy Technology Laboratory, Department of Energy, 3610 Collins Ferry Road, Morgantown, WV, USA

b Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV, USA
E-mail: nick.wu@mail.wvu.edu
Fax: +1-(304)-293-6689
Tel: +1-(304)-293-3326

c Department of Mechanical Engineering, Binghamton University, Binghamton, NY, USA

d State Key laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, P. R. China

e Institut National de la Recherche Scientifique, INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada

Abstract

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 °C to 900 °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.

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

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Article information

DOI
https://doi.org/10.1039/C0EE00300J
Article type
Paper
Submitted
22 Jul 2010
Accepted
13 Sep 2010
First published
03 Nov 2010

Energy Environ. Sci., 2011,4, 139-144

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

M. Zhi, G. Zhou, Z. Hong, J. Wang, R. Gemmen, K. Gerdes, A. Manivannan, D. Ma and N. Wu, Energy Environ. Sci., 2011, 4, 139 DOI: 10.1039/C0EE00300J

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