Modification of sulfonated poly(ether ether ketone) membranes by impregnation with the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate for proton exchange membrane fuel cell applications
| Autor: | Roberto F. de Souza, Emilse M.A. Martini, Márcia Regina Becker, Fabrício Celso, Cesar Liberato Petzhold, Letícia Guerreiro da Trindade |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Materials science Polymers and Plastics Membrane electrode assembly Proton exchange membrane fuel cell Ether 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Differential scanning calorimetry Membrane chemistry Chemical engineering Nafion Polymer chemistry Ionic liquid Materials Chemistry 0210 nano-technology |
| Zdroj: | Polymer Engineering & Science. 56:1037-1044 |
| ISSN: | 0032-3888 |
| DOI: | 10.1002/pen.24334 |
| Popis: | Sulfonated poly (ether ether ketone) (SPEEK) membranes were modified by impregnation with the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (BMI.BF4) by immersion into an IL aqueous solution for different periods of time. The modified membranes were investigated by thermogravimetric analyses (TGA), differential scanning calorimetry (DSC), ion exchange capacity (IEC), and conductivity. The SPEEK membrane immersed into the IL aqueous solution for 2 min showed greater dimensional and thermal stability than the pristine SPEEK membrane, and achieved higher decomposition temperatures. It also presented a higher conductivity value (1.0 mS cm−1), indicating that BMI.BF4 is a promoter of proton conductivity. The membrane electrode assembly (MEA) produced reached maximum values of power density of 0.13 W cm−2 and current density of 0.54 A cm−2 during fuel cell operation. The results indicate that the SPEEK membrane modified by immersion for 2 min is promising for use in a proton exchange membrane fuel cell. Its performance yielded values very close to those obtained with Nafion, which reaches maximum values of power density of 0.19 W cm−2 and current density of 0.77 A cm−2. POLYM. ENG. SCI., 2016. © 2016 Society of Plastics Engineers |
| Databáze: | OpenAIRE |
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