In this paper a critical study is presented on how the direct methanol fuel cell (DMFC) membrane properties are affected by a pre-treatment. Membranes based on sulfonated poly(ether ether ketone) (sPEEK) with sulfonation degree (SD) of 42% were used, plain and modified inorganically with 1wt.% of zirconium oxide. Nafion 1135 was used as reference. The results obtained show that the sPEEK polymer (SD=42%) enables the preparation of proton exchange membranes with improved properties compared to Nafion and to the ZrO2-modified sPEEK membrane, mainly due to its improved relation between proton conductivity and methanol permeation. After the pre-treatment, the plain sPEEK membrane had a performance 6.4 times higher in terms of maximum power output when used in the DMFC.
- Permeability coefficients and direct methanol fuel cell
- Sulfonated poly(ether ether ketone) (sPEEK)
ASJC Scopus subject areas
- Process Chemistry and Technology
- Chemical Engineering(all)
- Filtration and Separation