TiO2 nanometric powders were prepared via a sol-gel procedure and calcined at various temperatures to obtain different surface and bulk properties. The calcined powders were used as fillers in composite Nafion membranes for application in high temperature direct methanol fuel cells (DMFCs). The powder physico-chemical properties were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and pH measurements. The observed characteristics were correlated to the DMFC electrochemical behaviour. Analysis of the high temperature conductivity and DMFC performance reveals a significant influence of the surface characteristics of the ceramic oxide, such as oxygen functional groups and surface area, on the membrane electrochemical behaviour. A maximum DMFC power density of 350 mW cm-2 was achieved under oxygen feed at 145°C in a pressurized DMFC (2.5 bar, anode and cathode) equipped with TiO2 nano-particles based composite membranes. © 2004 Elsevier Ltd. All rights reserved.

Baglio, V., Aricò, A., Di Blasi, A., Antonucci, V., Antonucci, P., Licoccia, S., et al. (2005). Nafion-TiO2 composite DMFC membranes: Physico-chemical properties of the filier versus electrochemical performance. ELECTROCHIMICA ACTA, 50(5), 1241-1246 [10.1016/j.electacta.2004.07.049].

Nafion-TiO2 composite DMFC membranes: Physico-chemical properties of the filier versus electrochemical performance

LICOCCIA, SILVIA;TRAVERSA, ENRICO;
2005-01-01

Abstract

TiO2 nanometric powders were prepared via a sol-gel procedure and calcined at various temperatures to obtain different surface and bulk properties. The calcined powders were used as fillers in composite Nafion membranes for application in high temperature direct methanol fuel cells (DMFCs). The powder physico-chemical properties were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and pH measurements. The observed characteristics were correlated to the DMFC electrochemical behaviour. Analysis of the high temperature conductivity and DMFC performance reveals a significant influence of the surface characteristics of the ceramic oxide, such as oxygen functional groups and surface area, on the membrane electrochemical behaviour. A maximum DMFC power density of 350 mW cm-2 was achieved under oxygen feed at 145°C in a pressurized DMFC (2.5 bar, anode and cathode) equipped with TiO2 nano-particles based composite membranes. © 2004 Elsevier Ltd. All rights reserved.
2005
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07 - FONDAMENTI CHIMICI DELLE TECNOLOGIE
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Con Impact Factor ISI
Baglio, V., Aricò, A., Di Blasi, A., Antonucci, V., Antonucci, P., Licoccia, S., et al. (2005). Nafion-TiO2 composite DMFC membranes: Physico-chemical properties of the filier versus electrochemical performance. ELECTROCHIMICA ACTA, 50(5), 1241-1246 [10.1016/j.electacta.2004.07.049].
Baglio, V; Aricò, A; Di Blasi, A; Antonucci, V; Antonucci, P; Licoccia, S; Traversa, E; Fiory, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/15189
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