Journal
JOURNAL OF POWER SOURCES
Volume 228, Issue -, Pages 151-158Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.11.076
Keywords
DMFC; Electron beam lithography; Nafion patterning; Nafion lithography; Methanol crossover
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences (gs1) [DAC0298CH10886]
Ask authors/readers for more resources
Patterned Nafion 212 membrane prepared by electron beam lithography (EBL) coupled with dry etching was tested for DMFC applications. Pristine, O-2 blanket-etched, and electron beam exposed Nafion 212 test cells were also prepared and compared. Several parameters including in-plane conductivity, methanol crossover, I-V characteristics, and through-plane ohmic resistance were evaluated. The patterned membrane had the best combination of properties, benefiting from the exposure to electron beam and interfacial area enlargement as evidenced by its superior power density. The maximum power densities were 29.3, 32.5, 48.2, and 63.1 mW cm(-2) for the pristine, exposed, O-2 blanket-etched, and patterned membrane respectively. A Nafion 117 membrane test cell was also compared. While it exhibited reduced methanol crossover, it also had higher ohmic resistance and Tafel slope. The patterned Nafion 212 provided a 25% increase in power density compared to the N117 membrane. (c) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available