Artículos de revistas
Performance of a poly(2,5-benzimidazole)-based polymer electrolyte membrane fuel cell
Fecha
2012Registro en:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, OXFORD, v. 37, n. 8, supl. 1, Part 3, pp. 7212-7220, APR, 2012
0360-3199
10.1016/j.ijhydene.2011.12.030
Autor
Linares, Jose J.
Sanches, Cassandra
Paganin, Valdecir Antonio
Gonzalez, Ernesto Rafael
Institución
Resumen
The performance of an ABPBI-based High Temperature H-2/O-2 PEMFC system was studied under different experimental conditions. Increasing the temperature from 130 to 170 degrees C improved the cell performance, even though further increase was not beneficial for the system. Humidification of the H-2 stream ameliorated this behaviour, even though operating above 170 degrees C is not advisable in terms of cell performance. A significant electrolyte dehydration seems to negatively affect the fuel cell performance, especially in the case of the anode. In the presence of 2% vol. CO in the H-2 stream, the temperature exerted a positive effect on the cell performance, reducing the strong adsorption of this poison on the platinum sites. Moreover, humidification of the H-2 + CO stream increased the maximum power densities of the cell, further alleviating the CO poisoning effects. Actual CO-O-2 fuel cell results confirmed the significant beneficial effect of the relative humidity on the kinetics of the CO oxidation process. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.