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Issue 67, 2016
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A novel amphoteric ion-exchange membrane prepared by the pore-filling technique for vanadium redox flow batteries

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Abstract

A novel amphoteric ion-exchange membrane (AIEM) was prepared through the pore-filling technique, for vanadium redox flow battery (VRBs) applications. Their physico-chemical properties including vanadium ion permeability and electrochemical properties were investigated as a function of cross-linking degrees. Vanadium ion permeability was effectively suppressed by the quaternary ammonium group-induced Donnan exclusion effect and was only 7.7% of that of Nafion117. Finally, open circuit voltage measurements showed that VRBs assembled with the AIEM maintained voltages >1.3 V for over 43 h, which was superior to the cation exchange membranes (CEMs), studied. In addition, the VRBs with AIEM-4 exhibited higher columbic efficiency (ca. 98%) and energy efficiency (ca. 89%) than those with CEMs. Therefore, it may be concluded that pore-filled AIEMs are more suitable for use in VRBs than pore-filled CEMs. This work provides a convenient method for preparing new types of IEMs for various applications.

Graphical abstract: A novel amphoteric ion-exchange membrane prepared by the pore-filling technique for vanadium redox flow batteries

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Publication details

The article was received on 25 Mar 2016, accepted on 23 Jun 2016 and first published on 24 Jun 2016


Article type: Paper
DOI: 10.1039/C6RA07790K
Citation: RSC Adv., 2016,6, 63023-63029
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    A novel amphoteric ion-exchange membrane prepared by the pore-filling technique for vanadium redox flow batteries

    M. S. Lee, H. G. Kang, J. D. Jeon, Y. W. Choi and Y. G. Yoon, RSC Adv., 2016, 6, 63023
    DOI: 10.1039/C6RA07790K

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