Jump to main content
Jump to site search

Issue 6, 2016
Previous Article Next Article

Constructing efficient ion nanochannels in alkaline anion exchange membranes by the in situ assembly of a poly(ionic liquid) in metal–organic frameworks

Author affiliations

Abstract

Alkaline anion exchange membranes (AEMs) have triggered great interest in the energy field because they permit the use of non-precious metal catalysts in fuel cells. It is of great significance to fabricate highly conductive AEMs by intensifying the ion transport within membranes through constructing ion nanochannels that provide efficient hydroxide ion transport. In this study, we propose a new approach to construct well-organized ion nanochannels by the in situ assembly of a poly(ionic liquid) (PIL) as the ion carrier within the highly ordered pores of metal–organic frameworks (MOFs). The MOF membrane, prepared by a facile hot-press method, exhibited a high conductivity of 36.6 mS cm−1 at a low ion concentration of 0.633 mmol cm−3 (20 °C), which is 6 orders of magnitude higher than that of the MIL-101 containing no poly(ionic liquid). Accordingly, the transport behavior of hydroxide ions was exploited, providing MOF membranes showing a high effective mobility of up to 6.597 × 10−4 cm2 s V−1 and a high transport hydroxide ion efficiency of up to 36.64% at 20 °C. The results imply that the efficiency of OH conduction in the PIL confined MOF is 113% higher than that of the H+ conduction in Nafion.

Graphical abstract: Constructing efficient ion nanochannels in alkaline anion exchange membranes by the in situ assembly of a poly(ionic liquid) in metal–organic frameworks

Back to tab navigation

Supplementary files

Article information


Submitted
20 Dec 2015
Accepted
14 Jan 2016
First published
14 Jan 2016

J. Mater. Chem. A, 2016,4, 2340-2348
Article type
Paper

Constructing efficient ion nanochannels in alkaline anion exchange membranes by the in situ assembly of a poly(ionic liquid) in metal–organic frameworks

Z. Li, W. Wang, Y. Chen, C. Xiong, G. He, Y. Cao, H. Wu, M. D. Guiver and Z. Jiang, J. Mater. Chem. A, 2016, 4, 2340
DOI: 10.1039/C5TA10452A

Social activity

Search articles by author

Spotlight

Advertisements