期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 16, 页码 11969-11974出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.05.031
关键词
Direct methanol fuel cell; Pore former; Catalyst layer; Membrane electrode assembly
资金
- WCU (World Class University) program [R31-10013]
- Global Frontier R&D Program on Center for Multiscale Energy System through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology (MEST) [2009-0093814]
- Priority Research Centers Program through the NRF
- National Research Foundation of Korea [2011-0031571, R31-2012-000-10013-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The cathode catalyst layer in direct methanol fuel cells (DMFCs) was prepared using polystyrene beads as a pore former. Field emission scanning electron microscopy showed that the catalyst layer with the pore former contained pores with a uniform shape and size. Mercury intrusion porosimetry showed that the pore former increased the volume of secondary pores in the catalyst layer. The electrochemical properties of the membrane electrode assembly (MEA) were evaluated by current voltage polarization measurements, electrochemical impedance spectroscopy and cyclic voltammetry. These results suggest that the catalyst layer with the pore former reduces the mass transfer resistance and improves the cell performance by approximately 50% through modification of its morphology. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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