| Autor: |
Gokulapriyan, Ramasamy, Karthikeyan, S. C., Dong Jin Yoo |
| Zdroj: |
Journal of Materials Chemistry A; 9/21/2024, Vol. 12 Issue 35, p23880-23896, 17p |
| Abstrakt: |
This study introduces an innovative approach to enhancing the performance of anion exchange membranes (AEMs) for fuel cell applications by incorporating quaternized imidazolium functionalized ionic liquid (IL) into quaternized poly (2,6-dimethyl-1,4-phenylene oxide) (QPPO). The incorporation of IL not only boosts the membrane's bound water content to enhance the hopping mechanism but also supports additional imidazolium groups to facilitate the Grotthuss mechanism, collectively improving hydroxide ion conductivity. The resulting ultimate QIL-8% (The term “QIL” signifies QPPO with an incorporated ionic liquid) composite membrane exhibits an ion-exchange capacity of 3.3 meq g−1 and remarkable hydroxide ion conductivity of 135 mS cm−1 at 90 °C. Additionally, we synthesized a NiO/IrO2 (NIF) electrocatalyst for the cathode compartment. In single-cell tests, the QIL-8% membrane achieved a peak power density of 472 mW cm−2 with Pt/C-based gas diffusion electrodes (GDE) and 416 mW cm−2 with NIF based GDE at 80 °C under conditions of 75/100% relative humidity at the anode/cathode. The alkaline stability of the pristine and composite membranes was assessed in 1 M and 5 M solutions of KOH at 60 °C, and the leaching properties of the ionic liquid were investigated through the 1 H NMR spectrum, which ensures the strong character of the membrane design for advanced durability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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