Abstract
Composite membranes consisting of EMPyr(FH)1.7F (EMPyr = N-ethyl-N-methylpyrrolidinium) ionic liquid and hydroxyethylmethacrylate (HEMA) polymer (EMPyr(FH)1.7F/HEMA monomer = 7:3, 8:2, and 9:1 in molar ratios) were prepared as electrolytes for a nonhumidified fuel cell. The composite membranes showed good thermal stability up to 453 K, regardless of the HEMA content. For the EMPyr(FH)1.7F–HEMA (9:1) composite membrane, ionic conductivities were 8.9 and 81.9 mS cm−1 at 293 K and 373 K, respectively. In the single cell tests, a maximum power density of 32 mW cm−2 was observed at 323 K for a cell using the EMPyr(FH)1.7F–HEMA (9:1) composite membrane under nonhumidified conditions.
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