Preparation and characterization of anhydrous polymer electrolyte membranes based on poly(vinyl alcohol-co-ethylene) copolymer
- Authors
- Ahn, Sung Hoon; Lee, Do Kyoung; Seo, Jin Ah; Kim, Jong Hak; Lee, Ki Bong
- Issue Date
- 6월-2010
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Polymer electrolyte membrane; Anhydrous; Cross-linking; Proton conductivity; Fuel cells
- Citation
- IONICS, v.16, no.5, pp.475 - 480
- Indexed
- SCIE
SCOPUS
- Journal Title
- IONICS
- Volume
- 16
- Number
- 5
- Start Page
- 475
- End Page
- 480
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116352
- DOI
- 10.1007/s11581-009-0412-7
- ISSN
- 0947-7047
- Abstract
- Anhydrous polymer electrolyte membranes with cross-linked structure have been prepared based on poly(vinyl alcohol-co-ethylene) (PVA-co-PE) copolymer. The PVA units of copolymer served to induce thermal cross-linking with 4,5-imidazole dicarboxylic acid (IDA) via esterification while PE units controlled the membrane swelling and the mechanical properties of films. Upon doping with phosphoric acid (PA, H(3)PO(4)) to form imidazole-PA complexes, the proton conductivity of membranes continuously increased with increasing PA content. As a result, proton conductivity reached 0.01 S/cm at 100 A degrees C under anhydrous conditions. X-ray diffraction analysis revealed that both the d-spacing and crystalline peak of membranes were reduced upon introduction of IDA/PA due to the cross-linking effect. The PVA-co-PE/IDA/PA membranes exhibited good mechanical properties, e.g., 150 MPa of Young's modulus, as determined by a universal testing machine. Thermal gravimetric analysis also represented that the thermal stability of membranes was increased up to 200 A degrees C upon introduction of IDA/PA.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.