Cell Performance of ABPBI-Based High Temperature PEM Fuel Cells

2012 ◽  
Vol 229-231 ◽  
pp. 1034-1038
Author(s):  
Wei Mon Yan ◽  
Hsin Hung Chen ◽  
Guo Bin Jung ◽  
Chun I Lee ◽  
Chang Chung Yang
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Supported Catalyst ◽  
Catalyst Layer ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Operating Conditions ◽  
Cell Performance ◽  
Membrane Electrode ◽  
High Temperature Pem

In this work, the cell performance of high temperature PEM fuel cells based on ABPBI membranes was experimentally measured in details. The ABPBI-based high PEM fuel cell was fabricated by using ABPBI-based gas diffusion electrodewith directly adding carbon-supported- catalyst to a homogeneous ABPBI solution prior to deposition and its membrane electrode assembly. The effects of various Pt loading of the catalyst layer, as well as the effect of different operating conditions were studied. The cell performance was evaluated using dry hydrogen/oxygen gases, which added advantage of eliminating the complicated humidification system of nafion cells. The measured results reveal that a catalyst layer with the higher Pt loading has a higher cell performance. In addition, better cell performance is noted for a case with higher cell temperature or higher cathode flowrate.

Modeling Ultrasonic Sealing of Membrane Electrode Assemblies for High-Temperature PEM Fuel Cells

2011 ◽  
Author(s):  
Dave C. Guglielmo ◽  
Todd T. B. Snelson ◽  
Daniel F. Walczyk
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Catalyst Layer ◽  
Pem Fuel Cells ◽  
Membrane Electrode ◽  
Ultrasonic Bonding ◽  
Membrane Electrode Assemblies ◽  
Electrode Assemblies ◽  
Physics Simulation ◽  
High Temperature Pem

Ultrasonic bonding, with its extremely fast cycle times and energy efficiency, is being investigated as an important manufacturing technology for future mass production of fuel cells. The objectives of the authors’ research are to (1) create a multi-physics simulation model that predicts through-thickness energy distribution and temperature gradients during ultrasonic sealing of polybenzimidazole (PBI) based Membrane Electrode Assemblies (MEAs) for High Temperature PEM fuel cells, and (2) correlate the model with experimentally measured internal interface (e.g., membrane/catalyst layer) temperatures. The multi-physics model incorporates the electrode and membrane material properties (stiffness and damping) in conjunction with the ultrasonic process parameters including pressure, energy flux and vibration amplitude. Overall, the processing of MEAs with ultrasonic bonding rather than a hydraulic thermal press results in MEAs that meet or exceed required performance specifications, and potentially reduces the manufacturing time from minutes to seconds.

Characterization of Membrane Electrode Assemblies for High-Temperature PEM Fuel Cells

Fuel Cells ◽  
2016 ◽  
Vol 16 (5) ◽  
pp. 577-583 ◽  
Author(s):  
M. Rau ◽  
A. Niedergesäß ◽  
C. Cremers ◽  
S. Alfaro ◽  
T. Steenberg ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Pem Fuel Cells ◽  
Membrane Electrode ◽  
Membrane Electrode Assemblies ◽  
Electrode Assemblies ◽  
High Temperature Pem

Impedance-based Performance Analysis of Micropatterned Polymer Electrolyte Membrane Fuel Cells

2021 ◽  
pp. 1-33
Author(s):  
Morio Tomizawa ◽  
Keisuke Nagato ◽  
Kohei Nagai ◽  
Akihisa Tanaka ◽  
Marcel Heinzmann ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Catalyst Layer ◽  
Membrane Electrode Assembly ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Membrane Electrode

Abstract Micropatterns applied to proton exchange membranes can improve the performance of polymer electrolyte fuel cells; however, the mechanism underlying this improvement is yet to be clarified. In this study, a patterned membrane electrode assembly (MEA) was compared with a flat one using electrochemical impedance spectroscopy and distribution of relaxation time analysis. The micropattern positively affects the oxygen reduction reaction by increasing the reaction area. However, simultaneously, the pattern negatively affects the gas diffusion because it lengthens the average oxygen transport path through the catalyst layer. In addition, the patterned MEA is more vulnerable to flooding, but performs better than the flat MEA in low-humidity conditions. Therefore, the composition, geometry, and operating conditions of the micropatterned MEA should be comprehensively optimized to achieve optimal performance.

scholarly journals Impact of catalyst layer morphology on the operation of high temperature PEM fuel cells

2021 ◽  
Vol 7 ◽  
pp. 100042
Author(s):  
N. Bevilacqua ◽  
T. Asset ◽  
M.A. Schmid ◽  
H. Markötter ◽  
I. Manke ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Catalyst Layer ◽  
Pem Fuel Cells ◽  
High Temperature Pem
Sign in / Sign up

Export Citation Format

Share Document