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doped PAA–PEG membranes have been synthesized by incor-
porating [MIm][Tfo] into PAA–PEG superabsorbents as
HTPEMs. The proton transfer is carried out via hydrogen bonds
present in [MIm][Tfo] as well as those formed among [MIm][Tfo]
and functional group hosts –OH in PAA–PEG. The open pores
can be easily closed during the last step of the synthesis, effec-
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1
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ꢁ
1
ꢀ
conductivities of as high as 19.4 and 40.4 mS cm at 200 C
under anhydrous conditions have been achieved for [MIm][Tfo]
absorbed and doped PAA–PEG membranes, respectively. The
maximum strain and stress of the membranes at break are 709%
and 13.19 MPa for the [MIm][Tfo] absorbed PAA–PEG
membrane and 12.72 MPa and 1214% for the [MIm][Tfo] doped
PAA–PEG membrane, respectively. The new membranes also
show good chemical stability at elevated temperatures under
anhydrous conditions. The preliminary conductivity testing
results show reasonable performance. Further optimization on
membrane synthesis to enable thin-film fabrication and electrode
configuration could lead to a commercially viable, low-cost,
robust and high conductivity membrane for robust, high
temperature PEMFC applications.
2
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87.
This work was supported by the National High Technology
Research and Development Program 863 of China (no.
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