Preparation and ion transport properties of NaY zeolite-ionic liquid composites

作者：Ntais S; Moschovi A M; Paloukis F; Neophytides S; Burganos V N; Dracopoulos V; Nikolakis V^*

来源：Journal of Power Sources, 2011, 196(4): 2202-2210.

DOI：10.1016/j.jpowsour.2010.09.061

• Fuel cells
• PEM membranes
• Ionic liquids
• Zeolites
• Effective Medium Theory
• Conductivity

The physicochemical properties of protic ionic liquids (IL)-zeolite (Z) composites were investigated H-3 methylimidazolium bis(trifluoromethanesulfonyl) imide (TFSI)/NaY zeolite composites with different IL/Z weight ratios were prepared and characterized X-ray diffraction and FT-Raman measurements show the formation of NaTFSI during the preparation procedure which indicates that an ion exchange reaction is taking place during the composite preparation method N-2 physisorption shows that the zeolite pores are completely filled when IL/Z ratio is between 0 2 and 05 The water adsorption capacity of the samples decreased with IL/Z ratio The conductivity of the composite pellets increased with temperature and ionic liquid loading however significant enhancement was detected once the IL/Z weight ratio was higher than a threshold value (similar to 0 5) Moreover theoretical calculations were performed using the Effective Medium Theory in order to understand the effect of IL/Z ratio on conductivity In qualitative agreement with the experimental data the model shows a sharp incre

• 出版日期2011-2-15