Composite Nafion-based membranes, containing 5 wt % of high-purity mesoporous titania with an average pore size of about 3.5 nm heated to 350, 450, and 600 degrees C as a filler were successfully recasted. Field emission scanning electron microscopy observations showed a high degree of dispersion of mesoporous titania particles in Nafion. Direct methanol fuel cell investigation of such membranes at temperatures higher than 100 degrees C revealed a considerable influence of the presence of the ceramic oxide and of its specific surface area on the electrochemical behavior. The composite membranes allowed operation up to 145 degrees C, showing a significant performance improvement with respect to pure Nafion. At 145 degrees C with oxygen feed, a power density of about 335 mW/cm(2) was recorded for the composite Nafion-based membranes, containing 5 wt % of mesoporous titania calcined at 450 degrees C. (c) 2005 The Electrochemical Society. All rights reserved.
Baglio, V., Di Blasi, A., Arico, A., Antonucci, V., Antonucci, P., Trakanprapai, C., et al. (2005). Composite mesoporous titania nafion-based membranes for direct methanol fuel cell operation at high temperature. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 152(7), A1373-A1377 [10.1149/1.1931427].
Composite mesoporous titania nafion-based membranes for direct methanol fuel cell operation at high temperature
ESPOSITO, VINCENZO;LICOCCIA, SILVIA;TRAVERSA, ENRICO
2005-01-01
Abstract
Composite Nafion-based membranes, containing 5 wt % of high-purity mesoporous titania with an average pore size of about 3.5 nm heated to 350, 450, and 600 degrees C as a filler were successfully recasted. Field emission scanning electron microscopy observations showed a high degree of dispersion of mesoporous titania particles in Nafion. Direct methanol fuel cell investigation of such membranes at temperatures higher than 100 degrees C revealed a considerable influence of the presence of the ceramic oxide and of its specific surface area on the electrochemical behavior. The composite membranes allowed operation up to 145 degrees C, showing a significant performance improvement with respect to pure Nafion. At 145 degrees C with oxygen feed, a power density of about 335 mW/cm(2) was recorded for the composite Nafion-based membranes, containing 5 wt % of mesoporous titania calcined at 450 degrees C. (c) 2005 The Electrochemical Society. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
