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Synthesis and Characterization of Vinylbenzyl Chloride-co-Styrene-co-Hydroxyethyl Acrylate (VBC-co-St-co-HEA) Anion-Exchange Membrane for All-Vanadium Redox Flow Battery  

Baek, Young-Min (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Kwak, Noh-Seok (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Hwang, Taek-Sung (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Publication Information
Polymer(Korea) / v.35, no.6, 2011 , pp. 586-592 More about this Journal
Abstract
In this study, we synthesized vinylbenzyl chloride-co-styrene-co hydroxyethyl acrylate (VBC-co-St-co-HEA) copolymer that can be applied to redox the flow battery process. The anion exchange membrane was prepared by the amination and crosslinking of VBC-co-St-co-HEA copolymer. The chemical structure and thermal properties of VBC-co-St-co-HEA copolymer and aminated VBC-co-St-co-HEA(AVSH) membrane were characterized by FTIR, $^1H$ NMR, TGA, and GPC analysis. The membrane properties such as ion exchange capacity(IEC), electrical resistance, ion conductivity and efficiency of all-vanadium redox flow battery were measured. The IEC value, electrical resistance, and ion conductivity were 1.17 meq/g, $1.9{\Omega}{\cdot}cm^2$, 0.009 S/cm, respectively. The charge-discharge efficiency, voltage efficiency and energy efficiency from all-vanadium redox flow battery test were 99.5, 72.6 and 72.1%, respectively.
Keywords
anion exchange membrane; water uptake; ion exchange capacity; electrical resistance; all-vanadium redox flow battery;
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