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Anisotropic radio-chemically pore-filled anion exchange membranes for solid alkaline fuel cell (SAFC)

Title
Anisotropic radio-chemically pore-filled anion exchange membranes for solid alkaline fuel cell (SAFC)
Author
이영무
Keywords
Anion exchange membrane; Pore-filled membrane; Polyethylene; Simultaneous irradiation grafting; Alkaline fuel cell
Issue Date
2015-12
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v. 495, Page. 206-215
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. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0376738815300946?via%3Dihubhttp://hdl.handle.net/20.500.11754/30078
ISSN
0376-7388; 1873-3123
DOI
10.1016/j.memsci.2015.07.067
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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