Crosslinked anion exchange membranes with primary diamine-based crosslinkers for vanadium redox flow battery application
- Authors
- Cha, Min Suc; Jeong, Hwan Yeop; Shin, Hee Young; Hong, Soo Hyun; Kim, Tae-Ho; Oh, Seong-Geun; Lee, Jang Yong; Hong, Young Taik
- Issue Date
- Sep-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Anion exchange membrane; Primary amine crosslinker; Redox flow battery; Vanadium; poly(sulfone)s
- Citation
- JOURNAL OF POWER SOURCES, v.363, pp.78 - 86
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 363
- Start Page
- 78
- End Page
- 86
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/151758
- DOI
- 10.1016/j.jpowsour.2017.07.068
- ISSN
- 0378-7753
- Abstract
- A series of polysulfone-based crosslinked anion exchange membranes (AEMs) with primary diaminebased crosslinkers has been prepared via simple a crosslinking process as low-cost and durable membranes for vanadium redox flow batteries (VRFBs). Chloromethylated polysulfone is used as a precursor polymer for crosslinked AEM5 (CAPSU-x) with different degrees of crosslinking. Among the deVeloped AEM5, CAPSU-2.5 shows outstanding dimensional stability and anion (Cl-, SO42-, and OH-) conductivity. Moreover, CAPSU-2.5 exhibits much lower vanadium ion permeability (2.72 x 10(-8) cm(2) min(-1)) than Nafion 115 (2.88 x 10(-6) cm(2) min(-1)), which results in an excellent coulombic efficiency of 100%. The chemical and operational stabilities of the membranes have been investigated via ex situ soaking tests in 0.1 M VO2+ solution and in situ operation tests for 100 cycles, respectively. The excellent chemical, physical, and electrochemical properties of the CAPSU-2.5 membrane make it suitable for use in VRFBs.
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