Journal
JOURNAL OF POWER SOURCES
Volume 363, Issue -, Pages 153-160Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.07.071
Keywords
Direct methanol fuel cell; Methanol crossover; Metal crack; Membrane electrode assembly; Mechanical stretching
Funding
- Global Frontier RAMP
- D Program of the Center for Multiscale Energy Systems - National Research Foundation under the Ministry of Education, Science and Technology, Korea [2012M3A6A7054855]
- Institute for Basic Science (IBS) in Korea [IBS-R006-G1]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2016R1D1A3B03934752, 2016R1C1B1014564]
- Kangwon National University
- National Research Foundation of Korea [2016R1C1B1014564] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This work reports the successful reduction in methanol crossover by creating a thin cracked metal barrier at the interface between a Nafion (R) membrane and an electrode in direct methanol fuel cells (DMFCs). The cracks are generated by simple mechanical stretching of a metal deposited Nafion (R) membrane as a result of the elastic mismatch between the two attached surfaces. The cracked metal barriers with varying strains (similar to 0.5 and similar to 1.0) are investigated and successfully incorporated into the DMFC. Remarkably, the membrane electrode assembly with the thin metal crack exhibits comparable ohmic resistance as well as reduction of methanol crossover, which enhanced the device performance. (C) 2017 Elsevier B.V. All rights reserved.
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