Journal ArticleDOI
Porosity and catalyst utilization of thin layer cathodes in air operated PEM-fuel cells
TLDR
In this article, pore formers are added to the electrocatalyst slurry which is used for the hot spraying process to obtain additional coarse porosity for better access of oxygen from air to the depth of the cathode.Abstract:
Better performance of and higher electrocatalyst utilization in proton-exchange membrane fuel cells equipped with thin film electrodes is achieved by exploiting pore forming additives in the electrode recipe formulation. Preparing the membrane–electrode assembly by a hot spraying procedure already provides 35% porosity. Additional coarse porosity is obtained by adding pore formers to the electrocatalyst slurry which is used for the hot spraying process. This allows for a better access of oxygen from air to the depth of the cathode. For air operation at ambient pressure and low catalyst loading of 0.15mgPtcm-2 a current density of 200mAcm-2 at 0.7V cell voltage can be obtained with such electrodes.read more
Citations
More filters
Journal ArticleDOI
PEM fuel cell electrodes
Shawn Litster,Gerard F. McLean +1 more
TL;DR: In this article, a survey of recent literature with the objective to identify common components, designs and assembly methods for PEMFC electrodes is presented, and an overview of fabrication methods that have been shown to produce effective electrodes and those that are deemed to have high future potential.
Journal ArticleDOI
Modeling transport in polymer-electrolyte fuel cells.
Adam Z. Weber,John Newman +1 more
TL;DR: This review has highlighted the important effects that should be modeled and shown the vast complexities of transport within polymer-electrolyte fuel cells and the various ways they have been and can be modeled.
Journal ArticleDOI
AC impedance technique in PEM fuel cell diagnosis—A review
TL;DR: In this article, a review of the recent work on PEM fuel cells using the AC impedance technique is reviewed, with primary focus on the in situ measurements, and typical impedance spectra in several common scenarios are presented.
Journal ArticleDOI
A review of gas diffusion layer in PEM fuel cells: Materials and designs
TL;DR: A review of single and dual-layer gas diffusion layer (GDL) for PEM fuel cells and various materials and approaches used for development of novel GDL is presented in this paper.
Journal ArticleDOI
Electrocatalysis in water electrolysis with solid polymerelectrolyte
TL;DR: In this article, the development and optimization of the electrodes in a water electrolysis system using a polymer membrane as electrolyte have been carried out in order to achieve a cell voltage of 1.59 V (energy consumptio...
References
More filters
Journal ArticleDOI
Thin-film catalyst layers for polymer electrolyte fuel cell electrodes
TL;DR: In this paper, the Pt/C catalyst layer of polymer electrolyte fuel cell electrodes have been developed that substantially increase the utilization efficiency of the catalyst, and the performance of fuel cells based on the thin film catalyst layers are comparable with those of gas diffusion electrode designs that utilize several times as much platinum, thus the specific catalysts in the new structures are significantly higher.
Journal ArticleDOI
Characterization of polymer electrolyte fuel cells using ac impedance spectroscopy
TL;DR: In this paper, the ac impedance spectra of polymer electrolyte fuel cell (PEFC) cathodes measured under various experimental conditions are analyzed and compared by simultaneous least squares fitting of a set of spectra measured for several cathode potentials.
Related Papers (5)
Thin-film catalyst layers for polymer electrolyte fuel cell electrodes
Low platinum loading electrodes for polymer electrolyte fuel cells fabricated using thermoplastic ionomers
A Mathematical Model of the Solid‐Polymer‐Electrolyte Fuel Cell
Dawn Bernardi,Mark W. Verbrugge +1 more