کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1274403 | 1497544 | 2013 | 7 صفحه PDF | دانلود رایگان |

Sulfonated PEEK-WC polymer was obtained according to chloro-sulfonic acid procedure making possible the preparation of different membrane samples with a sulfonation degree from 48 to 90%. Dense membranes were prepared from casting solutions of S-PEEK-WC dissolved in DMF. Proton conductivity measurements were performed on such S-PEEK-WC membranes in a range of temperature from 30 to 120 °C and 100% of relative humidity, reaching 2.5 × 10−2 S cm−1 as the best value at 100 °C and with a sulfonation degree of 90%. In the meanwhile, the open circuit voltage of this S-PEEK-WC membrane (DS = 90%) varied from 0.963 V at 60 °C to 0.802 V at 100 °C, demonstrating that an increase of temperature negatively affects the membrane performance due to the mechanical properties degradation. In this work, a wide experimental campaign was carried out to investigate the electrochemical performances in terms of polarization curves, open circuit voltage and proton conductivity of S-PEEK-WC membranes as well as the fuel crossover and water uptake.
► This work reports S-PEEK-WC membranes for PEM fuel cells application as an alternative to Nafion membrane.
► The best proton conductivity of S-PEEK-WC membrane was around 2.5 × 10−2 S cm−1 at 100 °C and 100% of relative humidity.
► S-PEEK-WC membranes got very low fuel crossover showing 0.7 barrer of hydrogen permeability at 25 °C.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 1, 11 January 2013, Pages 551–557