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On Flow Maldistribution in PEMFC Stacks
International Journal of Green Energy, 2011Polymer electrolyte membrane fuel cell (PEMFC) stacks are widely studied for their own advantages. The flow maldistribution in unit cells may severely influence the fuel cell stack performance, mainly including the uniformity of current density and the voltage.
J. Wang, J. Yan, J. Yuan, B.Sunden
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Composite Proton‐Conducting Membranes for PEMFCs
Fuel Cells, 2007AbstractComposite membranes are of interest for PEMFCs and DMFCs. This paper describes a basic study of the influence of silica on the proton conductivity: (i) added as a filler to poly(vinylidene fluoride‐hexafluoropropylene) and poly(benzimidazole)‐based membranes activated with H3PO4, or (ii) included in the matrix of class II hybrids based on ...
Mustarelli, P +6 more
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Journal of Power Sources, 2006
Abstract The transient behavior of a proton exchange membrane fuel cell (PEMFC) with porosity is investigated in this study using a two-phase, half-cell model. The thin film agglomerate approach is used to model the catalyst layer. Both vapor transport and liquid water transport in the PEMFC are examined in this study. Proton transport is much faster
Shih-Ming Chang, Hsin-Sen Chu
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Abstract The transient behavior of a proton exchange membrane fuel cell (PEMFC) with porosity is investigated in this study using a two-phase, half-cell model. The thin film agglomerate approach is used to model the catalyst layer. Both vapor transport and liquid water transport in the PEMFC are examined in this study. Proton transport is much faster
Shih-Ming Chang, Hsin-Sen Chu
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Journal of Fuel Cell Science and Technology, 2014
Proton exchange membrane fuel cells (PEMFCs) have many advantages among the various types of fuel cells, such as high energy density, low temperature operation, near-zero pollution, and quick starting. Thereby, PEMFCs have been considered as the most promising alternative power sources in the transportation and stationary fields.
C. A. C. Sequeira, L. Amaral
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Proton exchange membrane fuel cells (PEMFCs) have many advantages among the various types of fuel cells, such as high energy density, low temperature operation, near-zero pollution, and quick starting. Thereby, PEMFCs have been considered as the most promising alternative power sources in the transportation and stationary fields.
C. A. C. Sequeira, L. Amaral
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Mathematical model of the PEMFC
Journal of Applied Electrochemistry, 2000A two-dimensional along-the-channel mass and heat transfer model for a proton exchange membrane fuel cell (PEMFC) is described. The model is used for calculation of cell performance (i.e., cell voltage against current density), ohmic resistance and water profile in the membrane, current distribution and variation of temperature along the gas channels ...
K. Dannenberg, P. Ekdunge, G. Lindbergh
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Behavior of PEMFC in starvation
Journal of Power Sources, 2006Starvation is a vivid word to describe the operation condition of a fuel cell in sub-stoichiometric reactants feeding. In starvation, a fuel cell could not present its best performance; moreover, there might also be safety issue because of cell reversal.
Zhixiang Liu +5 more
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ECS Transactions, 2006
Two important aspects for understanding membrane degradation in PEM fuel cells are Pt dissolution, migration and precipitation from the electrodes into the membrane and chemical attack of the membrane by hydroxyl radicals. Transmission electron microscopy was used to detect and quantify the distribution of Pt particles in Nafion membrane after ...
Sergei F. Burlatsky +4 more
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Two important aspects for understanding membrane degradation in PEM fuel cells are Pt dissolution, migration and precipitation from the electrodes into the membrane and chemical attack of the membrane by hydroxyl radicals. Transmission electron microscopy was used to detect and quantify the distribution of Pt particles in Nafion membrane after ...
Sergei F. Burlatsky +4 more
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PEMFC Electrocatalyst Development
ECS Meeting Abstracts, 2010Abstract not Available.
David Stevens +5 more
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Dynamics and control of membrane hydration in a PEMFC
2009 American Control Conference, 2009The Jubject of water mallagement is a key issue in the design and operation of Polymer Electrolyte Membrane Fuel Cells (PEMFC). In this paper we present a dynamic model central to understanding the water management and flooding issue. First we consider membrane hydration and show how the interplay between electro-osmatic drag and back-diffusion ...
Syed Ahmed, Donald J. Chmielewski
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A novel design and microfabrication for a micro PEMFC
Microsystem Technologies, 2003A novel design and microfabrication were developed for a micro PEM (Proton Exchange Membrane) fuel cell with a cross section of 5cm2 and thickness (for a single cell) of about 800 μm. A new design and fabrication processes were developed for both flow field plate and MEA parts. Air flows were completed in hydrogen fuel cells with low input pressure and
Shou-Shing Hsieh +3 more
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