期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 158, 期 5, 页码 B562-B567出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3559188
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资金
- Ontario Ministry of Research and Innovation
- Natural Sciences and Engineering Research Council of Canada (NSERC)
An improved catalyst deposition methodology based on a piezo-electric printing technique has been developed and used to fabricate catalyst coated membranes (CCM) with thin catalyst layers (1-5 mu m) and ultra-low Pt loadings (0.02-0.12 mg(Pt)/cm(2)). The performance of these CCMs was examined in proton exchange membrane fuel cells (PEMFCs). The catalyst utilization was observed to increase with decreasing catalyst layer thickness (decreasing Pt loading). The printed CCM with two layers containing an ultra-low Pt loading (0.02 mg(Pt)/cm(2)) exhibited Pt utilizations of 100%. Neglecting the anode contributions, the mass activity at 850 mV for the printed CCM is nearly 76.5 mA/mg(Pt) which is 3.5 times higher than that for the CCM fabricated by conventional spraying method (22.5 mA/mg(Pt)). (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3559188] All rights reserved.
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