Energies | 卷:8 |
Nonhumidified Fuel Cells Using N-Ethyl-N-methyl-pyrrolidinium Fluorohydrogenate Ionic Liquid-poly(VinylideneFluoride-Hexafluoropropylene) Composite Membranes | |
Rika Hagiwara1  Pisit Kiatkittikul1  Toshiyuki Nohira2  | |
[1] Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan; | |
[2] Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan; | |
关键词: ionic liquid; fluorohydrogenate; fuel cell; nonhumidification; polymer; PVdF-HFP; | |
DOI : 10.3390/en8066202 | |
来源: DOAJ |
【 摘 要 】
Composite membranes consisting of N-ethyl-N-methylpyrrolidiniumfluoro-hydrogenate (EMPyr(FH)1.7F) ionic liquid and poly(vinylidene fluoride hexafluoro-propylene) (PVdF-HFP) copolymer were successfully prepared in weight ratios of 5:5, 6:4, and 7:3 using a casting method. The prepared membranes possessed rough surfaces, which potentially enlarged the three-phase boundary area. The EMPyr(FH)1.7F/PVdF-HFP(7:3 weight ratio) composite membrane had an ionic conductivity of 41 mS·cm-1 at 120 °C. For a single cell using this membrane, a maximum power density of 103 mW·cm-2 was observed at 50 °C under non-humidified conditions; this is the highest power output that has ever been reported for fluorohydrogenate fuel cells. However, the cell performance decreased at 80 °C, which was explained by penetration of the softened composite membrane into gas diffusion electrodes to partially plug gas channels in the gas diffusion layers; this was verified by in situ a.c. impedance analysis and cross-sectional SEM images of the membrane electrode assembly.
【 授权许可】
Unknown