Title of article :
Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes
Author/Authors :
Sérgio H. Pezzin، نويسنده , , Norbert Stock، نويسنده , , Sergey Shishatskiy، نويسنده , , Suzana P. Nunes، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
New hybrid membranes for fuel cell applications based on sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysilsesquioxanes were synthesized. The impedance spectroscopy measurements show an increase of the proton conductivity for all studied composites, in comparison to plain SPEEK. For hybrid membranes containing 20 wt% of polysilsesquioxane with 80 mol% of phosphonated units the conductivities can reach values that are similar to Nafion 117® at 100% RH. The best results of proton conductivity (142 mS/cm) were obtained for composites with 40 wt% of the same polysilsesquioxane at 120 °C also at 100% RH.
Keywords :
Fuel cells , Polysilsesquioxanes , Hybrid membrane , SPEEK , Proton conductivity
Journal title :
Journal of Membrane Science
Journal title :
Journal of Membrane Science