期刊
JOURNAL OF MEMBRANE SCIENCE
卷 595, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2019.117560
关键词
Anion exchange membranes; Dense N-Spirocyclic cations; Side-chain
资金
- National Nature Science Foundation of China [21576226, 21878252]
To prepare anion exchange membranes (AEMs) with high performances, we tethered the as-synthesized oligomers with dense N-spirocyclic cations (NS) as the side-chain to poly(ether sulfone) (PES). The steric hindrance of spirocyclic structure and electron-donating effect of alkyl spacers significantly enhance the stability of cations in harsh alkaline and high hydration conditions. Correspondingly, the ionic exchange capacity (IEC) of PES-NS-10% only decreased by 13.8% and the conductivity remained 84.3% after being immersed in harsh environment (80 degrees C, 2 M NaOH) for 864 h. In addition, the high density of N-spirocyclic cations in the side-chain benefits the formation of clear microphase separation, as confirmed by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The highest conductivity of 95.5 mS cm(-1) was achieved by PES-NS-10% at 80 degrees C while the corresponding swelling ratio was only 7.69%. Furthermore, the single cell assembled with PES-NS-10% showed a peak power density of 110.1 mW cm(-2) at 300 mA cm(-2). Durability test of the single cell based on PES-NS-10% under 100 mA cm(-2) also demonstrates that the as-prepared AEMs with NS have potential application for fuel cells.
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