Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 541, Issue -, Pages 474-482Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2017.07.037
Keywords
Alkaline anion exchange membrane; Poly(ether ketone); Imidazolium; Octaphenyl polyhedral oligomeric silsesquioxane; Hydroxide conductivity
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Funding
- National Nature Science Foundation of China [51274130]
- Recruitment Program of Global Experts
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13026]
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Imidazolium-functionalized octaphenyl polyhedral oligomeric silsesquioxane nanoparticles were incorporated into imidazolium-functionalized poly(ether ether ketone) (ImPEEK) to fabricate high-performance anion exchange membranes with tuneable microphase separation structures and efficient ion transport channels. High-resolution transmission electron microscopy observations revealed the formation of ion channels in the membranes due to the aggregation of imidazolium groups. The transport of hydroxide ions in the composite membranes was facilitated by the increase in the effective ion mobility from 2.27x10(-4) to 3.09x10(-4) cm(2) s(-1) V-1, while their hydroxide conductivity at 30 degrees C (36.22-44.11 mS cm(-1)) was significantly higher than that of an ImPEEK control membrane (30.66 mS cm(-1)).
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