Journal
ELECTROCHIMICA ACTA
Volume 146, Issue -, Pages 495-502Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.09.094
Keywords
Dual Layer; Catalyst Layer; Phase Separation; Proton Exchange Membrane Fuel Cell; Model
Categories
Funding
- Manpower Development Program for Energy & Resources - Ministry of Knowledge and Economy, Republic of Korea
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education, Science and Technology [2010-0024794]
- National Research Foundation of Korea [2010-0024794] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A novel design of the dual-layered catalyst layer is performed using catalytic layers with different degrees of phase separation of Nafion. Empirical equations of the water uptake and the proton conductivity are introduced for highly phase-separated catalyst layer. Simulation results are in good agreement with experimental data using catalyst layers prepared from different solvents, which are carefully designed to have different degrees of phase separation. The effect of highly phase-separated catalyst layer is further investigated with different electrode configurations. As a result, the highly phase-separated catalyst layer shows promising aspects as an efficient water protective layer with catalytic activity. Consequently, the proposed electrode, composed of a highly phase-separated external layer and a lowly phase-separated inner layer, results in an increase of the cell performance in the high-current region. (C) 2014 Elsevier Ltd. All rights reserved.
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