TY - JOUR
T1 - Investigating the effects of methanol-water vapor mixture on a PBI-based high temperature PEM fuel cell
AU - Araya, Samuel Simon
AU - Andreasen, Søren Juhl
AU - Nielsen, Heidi Venstrup
AU - Kær, Søren Knudsen
PY - 2012
Y1 - 2012
N2 - This paper investigates the effects of methanol and water vapor on the performance of a high temperature proton exchange membrane fuel cell (HT-PEMFC). A H3PO4-doped polybenzimidazole (PBI) membrane electrode assembly (MEA), Celtec P2100 of 45 cm2 of active surface area from BASF was employed. A long-term durability test of around 1250 h was performed, in which the concentrations of methanol-water vapor mixture in the anode feed gas were varied. The fuel cell showed a continuous performance decay in the presence of vapor mixtures of methanol and water of 5% and 8% by volume in anode feed. Impedance measurements followed by equivalent circuit fitting revealed that the effects were most significant for intermediate-high frequency resistances, implying that charge transfer losses were the most significant losses. Vapor mixture of 3% in feed, however, when introduced after operation at 8%, showed positive or no effect on the cell's performance in these tests.
AB - This paper investigates the effects of methanol and water vapor on the performance of a high temperature proton exchange membrane fuel cell (HT-PEMFC). A H3PO4-doped polybenzimidazole (PBI) membrane electrode assembly (MEA), Celtec P2100 of 45 cm2 of active surface area from BASF was employed. A long-term durability test of around 1250 h was performed, in which the concentrations of methanol-water vapor mixture in the anode feed gas were varied. The fuel cell showed a continuous performance decay in the presence of vapor mixtures of methanol and water of 5% and 8% by volume in anode feed. Impedance measurements followed by equivalent circuit fitting revealed that the effects were most significant for intermediate-high frequency resistances, implying that charge transfer losses were the most significant losses. Vapor mixture of 3% in feed, however, when introduced after operation at 8%, showed positive or no effect on the cell's performance in these tests.
KW - High temperature PEM
KW - Fuel cell
KW - Methanol
KW - Impedance spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84868204021&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.09.009
DO - 10.1016/j.ijhydene.2012.09.009
M3 - Journal article
SN - 0360-3199
VL - 37
SP - 18231
EP - 18242
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 23
ER -