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Influence of the Surface Roughness of Plasma-Sprayed YSZ on LSM Cathode Polarization in Solid Oxide Fuel Cells
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Influence of the Surface Roughness of Plasma-Sprayed YSZ on LSM Cathode Polarization in Solid Oxide Fuel Cells

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Abstract:

Under SOFCs operating condition, the cathode reaction rate is determined by triple phase boundary (TPB) areas which are associated with the geometry of the interface between the cathode and the electrolyte. In this paper, YSZ electrolyte was deposited by atmospheric plasma spraying (APS). A nano-scaled lanthanum strontium manganate (LSM) cathode was prepared by sol-gel process on APS YSZ with different surface roughness to aim at increasing the TPB. The polarization curves of LSM cathode were characterized by potentiostat. The influence of the roughness of APS YSZ on the polarization of LSM cathode was investigated. It was found that the overpotential of the LSM cathode is significantly reduced with the increase of YSZ surface roughness.

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Info:

Periodical:

Key Engineering Materials (Volumes 373-374)

Pages:

641-644

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.373-374.641

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Online since:

March 2008

Authors:

Min Gao, Cheng Xin Li, Ming De Wang, Hua Lei Wang, Chang Jiu Li

Keywords:

Atmospheric Plasma Spraying (APS), Lanthanum Strontium Manganate (LSM), Polarisation, Solid Oxide Fuel Cell (SOFC), Surface Roughness (SR), Triple Phase Boundary (TPB), Yttria Stabilized Zirconia (YSZ)

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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