Amorphous carbon coated stainless separator for PEFCs

An SUS316L stainless steel separator was coated with amorphous carbon by using an electron cyclotron resonance (ECR) plasma sputtering technique, and used in a polymer electrolyte fuel cell (PEFC). Characteristics of this carbon film were investigated with Raman spectroscopy and XPS. Quantitative de...

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Bibliographic Details
Published in:Surface & coatings technology 2008-05, Vol.202 (17), p.4094-4101
Main Authors: Mori, Y., Ueda, M., Hashimoto, M., Aoi, Y., Tanase, S., Sakai, T.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
ECR plasma sputtering
Exact sciences and technology
GD-OES
Materials science
Metals. Metallurgy
PEFC
Physics
Production techniques
Raman spectroscopy
Stainless separator
Surface treatment
Surface treatments
XPS
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Summary:An SUS316L stainless steel separator was coated with amorphous carbon by using an electron cyclotron resonance (ECR) plasma sputtering technique, and used in a polymer electrolyte fuel cell (PEFC). Characteristics of this carbon film were investigated with Raman spectroscopy and XPS. Quantitative depth profiles and chemical depth profiles of the deposited carbon layer were measured with GD-OES and XPS, respectively. The contact resistivity between a carbon paper and the carbon coated SUS316L steel was also measured. The performance of PEFC single cells assembled with carbon coated SUS316L separators, uncoated SUS316L separators, and conventional carbon separators were compared. The results revealed that an assembled PEFC having carbon coated SUS316L separators provided better performance than one having uncoated SUS316L, and the PEFC showed comparable performance to one having conventional carbon separators.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2008.02.020