Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 598, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2019.117797
Keywords
Anion exchange membranes; poly(meta-terphenyl piperidinium); Super-acid polymerization; Densely functionalized; Alkaline fuel cells
Categories
Funding
- National Key Research and Development Program of China [2016YFB0101203]
- National Natural Science Foundation of China [21776014, 21776012, U1705253]
- Beijing Municipal Science and Technology Program [Z171100000917019]
- Tarim University [ZZ1703]
- Fundamental Research Funds for the Central Universities [12060093063]
- Beijing University of Chemical Technology [ZZ1703]
- International S&TCooperation Program of China [2013DFA51860]
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Poly(arylene piperidine)s (PAPs) backbones, which do not contain unstable ether bonds, was synthesized by one-pot, metal-free superacid-catalyzed polymerization for anion exchange membranes (AEMs) preparation. Meta-terphenyl as a monomer of polymer to regulate the morphology and properties of AEM was also used due to its spatially torsional configuration instead of the recently reported linear structure of peta-terphenyl. Long flexible hydrophilic chains were grafted onto poly(meta terphenyl piperidinium) (m-PTP) backbone to form four cationic functionalized side chains, promoting efficient transfer of OH- and optimizing the hydrophilic/hydrophobic microphase separation structure. The resulting AEM shows a high ion conductivity of 164 mS/cm (mPTP-TFPE-21) at 80 degrees C. Furthermore, stable piperidine cation and long alkyl spacer chain contributed to the excellent alkali stability of m-PTP-TFPE-TQA membrane which shows only 11.67% and 12.73% degradation in ion conductivity and IEC, respectively, after soaking in 2 M NaOH at 80 degrees C for 1500 h. The peak power density of the H-2/O-2 single cell using m-PTP-TFPE-14 is 269 mW/cm(2) at a current density of 540 mA/cm(2) at 80 degrees C.
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