کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1286365 | 973184 | 2007 | 5 صفحه PDF | دانلود رایگان |
Novel composite electrolyte membranes consisting of [EMIm](FH)nF (EMIm = 1-ethyl-3-methylimidazolium, n = 1.3 and 2.3) ionic liquids and fluorinated polymers were synthesized and their physical and electrochemical properties were measured under unhumidified conditions for their application to the intermediate temperature fuel cells. The ionic conductivities of composite membrane, P(VdF-co-HFP)/s-DFBP-HFDP/[EMIm](FH)2.3F (1/0.3/1.75 in weight ratio), were 11.3 and 34.7 mS cm−1 at 25 and 130 °C, respectively. The open circuit voltage (OCV) observed for the single cell using [EMIm](FH)2.3F composite electrolyte was ∼1.0 V at 130 °C for over 5 h. The maximum power density of 20.2 mW cm−2 was observed under the current of 60.1 mA cm−2 at 120 °C. From the high thermal stability and high ionic conductivity, the fluorohydrogenate ionic liquid composite membranes are regarded as promising candidates for the electrolytes of the unhumidified intermediate temperature fuel cells.
Journal: Journal of Power Sources - Volume 171, Issue 2, 27 September 2007, Pages 535–539