Journal ArticleDOI
Modeling and Experimental Diagnostics in Polymer Electrolyte Fuel Cells
TLDR
In this paper, the authors present a fit between model and experiment for well-humidified polymer electrolyte fuel cells operated to maximum current density with a range of cathode gas compositions.Abstract:
This paper presents a fit between model and experiment for well-humidified polymer electrolyte fuel cells operated to maximum current density with a range of cathode gas compositions. The model considers, in detail, losses caused by: (1) interfacial kinetics at the Pt/ionomer interface, (2) gas-transport and ionic-conductivity limitations in the catalyst layer and (3) gas-transport limitations in the cathode backing. The authors` experimental data were collected with cells that utilized thin-film catalyst layers bonded directly to the membrane, and a separate catalyst-free hydrophobic backing layer. This structure allows a clearer resolution of the processes taking place in each of these distinguishable parts of the cathode. In their final comparison of model predictions with the experimental data, they stress the simultaneous fit of a family of complete polarization curves obtained for gas compositions ranging from 5 atm O{sub 2} to a mixture of 5% O{sub 2} in N{sub 2}, employing in each case the same model parameters for interfacial kinetics, catalyst-layer transport, and backing-layer transport. This approach allowed them to evaluate losses in the cathode backing and in the cathode catalyst layer, and thus identify the improvements required to enhance the performance of air cathodes in polymer electrolyte fuel cells. Finally, theymore » show that effects of graded depletion in oxygen along the gas flow channel can be accurately modeled using a uniform effective oxygen concentration in the flow channel, equal to the average of inlet and exit concentrations. This approach has enabled simplified and accurate consideration of oxygen utilization effects.« lessread more
Citations
More filters
Journal ArticleDOI
Scientific aspects of polymer electrolyte fuel cell durability and degradation.
Rodney L. Borup,Jeremy P. Meyers,Bryan S. Pivovar,Yu Seung Kim,Rangachary Mukundan,Nancy Garland,Deborah J. Myers,Mahlon S. Wilson,Fernando H. Garzon,David L. Wood,Piotr Zelenay,Karren L. More,Ken Stroh,Thomas A. Zawodzinski,James M. Boncella,James E. McGrath,Minoru Inaba,Kenji Miyatake,Michio Hori,Kenchiro Ota,Zempachi Ogumi,Seizo Miyata,Atsushi Nishikata,Zyun Siroma,Yoshiharu Uchimoto,Kazuaki Yasuda,Ken'ichi Kimijima,Norio Iwashita +27 more
TL;DR: The research focuses on the durability of polymer electrolyte fuel cells (PEFCs), in particular, membrane degradation, and he has been involved in NEDO R&D research projects on PEFC durability since 2001.
Journal ArticleDOI
A review of polymer electrolyte membrane fuel cells: Technology, applications,and needs on fundamental research
TL;DR: In this article, the authors present the latest status of PEM fuel cell technology development and applications in the transportation, stationary, and portable/micro power generation sectors through an overview of the state-of-the-art and most recent technical progress.
Journal ArticleDOI
New Insights into Perfluorinated Sulfonic-Acid Ionomers
Ahmet Kusoglu,Adam Z. Weber +1 more
TL;DR: In this comprehensive review, recent progress and developments on perfluorinated sulfonic-acid (PFSA) membranes have been summarized on many key topics, including structure/transport correlations and modeling, composite PFSA membranes, degradation phenomena, and PFSA thin films.
Journal ArticleDOI
Fundamental models for fuel cell engineering.
TL;DR: Technical Challenges 4754 4.2.1.
Journal ArticleDOI
A review of water flooding issues in the proton exchange membrane fuel cell
Hui Li,Yanghua Tang,Zhenwei Wang,Zheng Shi,Shaohong Wu,Datong Song,Jianlu Zhang,Khalid Fatih,Jiujun Zhang,Haijiang Wang,Zhong-Sheng Liu,Rami Abouatallah,Antonio Mazza +12 more
TL;DR: In this article, the authors reviewed more than 100 references related to water management in proton exchange membrane (PEM) fuel cells, with a particular focus on the issue of water flooding, its diagnosis and mitigation.
Related Papers (5)
A Mathematical Model of the Solid‐Polymer‐Electrolyte Fuel Cell
Dawn Bernardi,Mark W. Verbrugge +1 more
Mathematical model of a gas diffusion electrode bonded to a polymer electrolyte
Dawn Bernardi,Mark W. Verbrugge +1 more