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Advantages of a Polyimide Membrane Support in Nonhumidified Fluorohydrogenate‐Polymer Composite Membrane Fuel Cells
Author(s) -
Kiatkittikul P.,
Nohira T.,
Hagiwara R.
Publication year - 2015
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201400150
Subject(s) - polyimide , membrane , materials science , composite number , polymer , polytetrafluoroethylene , softening , membrane electrode assembly , composite material , chemical engineering , ionic liquid , electrode , conductivity , proton exchange membrane fuel cell , polymer chemistry , chemistry , organic chemistry , catalysis , layer (electronics) , biochemistry , engineering , electrolyte
We have successfully prepared composite membranes consisting of the ionic liquid N ‐ethyl‐ N ‐methylpyrrolidinium fluorohydrogenate and the polymer 2‐hydroxyethylmethacrylate and have secured them on a polyimide (PI) membrane support. The resulting EMPyr(FH) 1.7 F–HEMA (9:1 molar ratio) composite possesses ionic conductivity of 75 mS cm −1 at 120 °C when a 16‐µm support is employed, showing improved performance with elevated temperature; this marks a significant difference from devices using conventional polytetrafluoroethylene supports. In the single cell test, a maximum power density of 31 mW cm −2 is observed at 120 °C. Cross‐sectional SEM images of the corresponding membrane electrode assemblies reveal no significant difference in membrane thickness before and after cell testing, implying that this support does not suffer from membrane softening issues.