Dually cross-linked polymer electrolyte membranes for direct methanol fuel cells
- Authors
- Lee, Won Hyo; Lee, Kang Hyuck; Shin, Dong Won; Hwang, Doo Sung; Kang, Na Rae; Cho, Doo Hee; Kim, Ji Hoon; Lee, Young Moo
- Issue Date
- May-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Direct methanol fuel cell; Polymer electrolyte membrane; End-group crosslinking; Ionic crosslinking
- Citation
- JOURNAL OF POWER SOURCES, v.282, pp.211 - 222
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 282
- Start Page
- 211
- End Page
- 222
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/133962
- DOI
- 10.1016/j.jpowsour.2015.01.191
- ISSN
- 0378-7753
- Abstract
- End-group crosslinkable sulfonated poly(arylene ether sulfone) copolymer (ESPAES) and imidazolium poly(arylene ether sulfone) copolymer (IPAES) are synthesized as a proton exchange membrane and ionic crosslinker, respectively. A novel dually cross-linked membrane (DCM) based on ESPAES is similar to an inter-penetrating network and is prepared via blending IPAES and thermal treatment for direct methanol fuel cell (DMFC) applications. The synergistic effects of end-group crosslinking and ionic crosslinking improve chemical and thermal stability and mechanical properties. In addition, the DMFC performance of the DCM outperforms that of the end-group cross-linked SPAES and Nafion (R) 212 due to its excellent fuel barrier property in spite of relatively low proton conductivity, which is derived from the content of the non-proton conducting IPAES copolymer. Consequently, the DCM has great potential as an electrolyte membrane for DMFC applications.
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