Anisotropic radio-chemically pore-filled anion exchange membranes for solid alkaline fuel cell (SAFC)
- Authors
- Hwang, Doo Sung; Sherazi, Tauqir A.; Sohn, Joon Yong; Noh, Yeong Chang; Park, Chi Hoon; Guiver, Michael D.; Lee, Young Moo
- Issue Date
- Dec-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Anion exchange membrane; Pore-filled membrane; Polyethylene; Simultaneous irradiation grafting; Alkaline fuel cell
- Citation
- JOURNAL OF MEMBRANE SCIENCE, v.495, pp.206 - 215
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MEMBRANE SCIENCE
- Volume
- 495
- Start Page
- 206
- End Page
- 215
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/133947
- DOI
- 10.1016/j.memsci.2015.07.067
- ISSN
- 0376-7388
- Abstract
- Anion exchange pore-filled membranes based on meso-porous polyethylene support are fabricated through a radio-chemical grafting process. Vinylbenzylchloride (VBC) monomers are grafted onto porous polyethylene substrate by a simultaneous irradiation grafting method. The porous polyethylene substrate provides high chemical and mechanical stability. The pore-filled membranes are subsequently functionalized by trimethylamine (TMA) and ion exchange with sodium hydroxide, yielding alkaline anion exchange membranes that are capable of conducting hydroxide ions. The mesa-porous support structure contributes to a reduction in dimensional swelling while maintaining high water uptake, high ion exchange capacity, and enhanced mechanical strength of over 50 MPa. In particular, these radio-chemically pore-filled membranes exhibits anisotropic through-plane oriented ion conductive behavior due to the low resistance of the hydrated cross-sectional structure derived from the nonwoven porous substrate. As a result of reinforced mechanical strength and anisotropic electrochemical property, the membrane exhibits good membrane-electrode assembly (MEA) performance (at 0.6 V, max. current density=174 mA cm(-2) and max. power density=127 mW cm(-2)) in solid alkaline fuel cell.
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