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[] Performance evaluation of microtubular solid oxide fuel cell prototypes at a laboratory scale and identification of requirements for gas sensors

1 Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana Unidad Iztapalapa, Mexico City, Mexico
2 Posgrado en Energía y Medio Ambiente; Universidad Autónoma Metropolitana Unidad Iztapalapa, Av. San Rafael Atlixco 186, Colonia Vicentina, Mexico City
* Author to whom correspondence should be addressed.
14 November 2017
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Abstract

 Solid Oxide Fuel Cells (SOFC´s) are devices for the chemical to electrical energies conversion. Traditional SOFC´s have been applied in stationary power generation systems based on their high efficiencies (~ 60%) and high operating temperatures (~ 1000 °C). They present the flexibility to be operated with a variety of fuels (e.g. hydrogen, alcohols, methane). Among the different architectures that they can present, microtubular SOFC´s have lower operating temperatures, higher tolerance to thermal cycles, faster start-up capacity and higher volumetric power densities, compared to conventional tubular SOFC´s. The present contribution includes results of the performance evaluation of microtubular SOFC´s. Prototypes were fabricated based on a dip coating technique; a cermet of Ni-Ce0.8Gd0.2O2-x was used as the anode, Ce0.8Gd0.2O2-x as the electrolyte, and La0.8Sr0.2Co0.2Fe0.8O3 as the cathode. The performance of the cells was evaluated based on the polarization curves obtained by linear sweep voltammetry measurements in the 500-600 °C range, using hydrogen as a fuel. Electrical Impedance Spectroscopy measurements were also performed. Failure of the cells can be predicted from electrical measurements and could be related to formation of fractures in the cells or the cement sealant. During the evaluation, safety relies on gas sensors to detect fuel leaks.

Keywords

Solid Oxide Fuel Cells, Electrical power generation, Hydrogen

Cite this article as

Ramos Villegas, C.; Fernández Rendón, C.; Avila-Paredes, H. Performance evaluation of microtubular solid oxide fuel cell prototypes at a laboratory scale and identification of requirements for gas sensors. In Proceedings of the 4th Int. Electron. Conf. Sens. Appl., 15–30 November 2017; ; doi:10.3390/ecsa-4-04910

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Performance Evaluation of Microtubular Solid Oxide Fuel Cell Prototypes at a Laboratory Scale and Identification of Needs Related to Gas Sensors

Author biographies

Hugo Avila-Paredes
Hugo Avila-Paredes got his B. S. in Chemical Engineering at the Universidad Autónoma Metropolitana Unidad Iztapalapa. He obtained his M.S. and Ph. D. in Chemical Engineering at the Department of Chemical Engineering and Materials Science at the University of California, Davis (2009). He is currently a faculty member at the Department of Processes and Hydraulics Engineering at the Universidad Autonoma Metropolitana, Unidad Iztalapapa in Mexico City.

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