کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1286978 | 973209 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Performance of membrane electrode assemblies based on proton exchange membranes prepared by pre-irradiation induced grafting Performance of membrane electrode assemblies based on proton exchange membranes prepared by pre-irradiation induced grafting](/preview/png/1286978.png)
Proton exchange membranes (PEMs) were prepared by pre-irradiation induced grafting of styrene (S) or styrene/divinylbenzene (S/DVB) into the radiation-crosslinked polytetrafluoroethylene (RX-PTFE) films and then sulfonated. The thicknesses of the obtained PEMs were lower than 20 μm and the ion exchange capacity (IEC) values were around 2 meq g−1. The surfaces of the PEMs and carbon electrodes were coated with Nafion® dispersion, and then membrane electrode assembles (MEAs) were prepared by hot-pressing them together. A MEA based on a Nafion® 112 membrane was also prepared under same procedure for comparison. The performances of the MEAs in a single cell were tested under different cell temperatures and humidifications. Electrochemical impedance spectra (EIS) were measured with ac frequencies which ranged from 100 kHz to 1 Hz at a dc density of 0.5 A cm−2. The obtained impedance curves in Nyquist representation were semicircular.
Journal: Journal of Power Sources - Volume 161, Issue 1, 20 October 2006, Pages 99–105