A study of water adsorption and desorption by a PBI-H3PO4 membrane electrode assembly

作者：Gu, T; Shimpalee, S^*; Van Zee, J W; Chen, C Y; Lin, C W

来源：Journal of Power Sources, 2010, 195(24): 8194-8197.

DOI：10.1016/j.jpowsour.2010.06.063

• PolyBenzImidazole
• High Temperature Membrane
• Fuel cells
• PEMFC
• Adsorption and desorption
• Phosphoric acid

Data corresponding to the isotherms for the equilibrium water content of a PolyBenzImidazole (PBI)-H3PO4 High Temperature Membrane Electrode Assembly (HT-MEA) are presented over a range of temperatures from 30 degrees C to 180 degrees C. The data show values for the ratio of water to acid which range from 4.0 at 70 degrees C to 0.2 at 160 degrees C at 30 kPa of water vapor pressure. In addition to the equilibrium data, rates of adsorption are shown to have time constants on the order of 500 s and 2500 s at 70 degrees C and 50 degrees C, respectively. At temperatures above 100 degrees C the time constants for adsorption are on the order of 100 s. These data allow for the calculation of "acid dilution" in this HT-MEA during low-temperature excursions and start up/shut down.

• 出版日期2010-12-15
• 单位中山大学