Pt–Co/C Cathode Catalyst Degradation in a Polymer Electrolyte Fuel Cell Investigated by an Infographic Approach Combining Three-Dimensional Spectroimaging and Unsupervised Learning

2019 ◽  
Vol 123 (31) ◽  
pp. 18844-18853 ◽  
Author(s):  
Yuanyuan Tan ◽  
Hirosuke Matsui ◽  
Nozomu Ishiguro ◽  
Tomoya Uruga ◽  
Duong-Nguyen Nguyen ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Unsupervised Learning ◽  
Polymer Electrolyte ◽  
Three Dimensional ◽  
Polymer Electrolyte Fuel Cell ◽  
Cathode Catalyst

Three-Dimensional Visualization of Water Behavior in Polymer Electrolyte Fuel Cell by Using Neutron Radiography

2011 ◽  
Author(s):  
Michinori Hashimoto ◽  
Hideki Murakawa ◽  
Katsumi Sugimoto ◽  
Hitoshi Asano ◽  
Nobuyuki Takenaka ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Neutron Radiography ◽  
Three Dimensional ◽  
Image Intensifier ◽  
Polymer Electrolyte Fuel Cell ◽  
Reconstruction Method ◽  
Ct Reconstruction ◽  
Water Behavior ◽  
Neutron Image

Visualization of dynamic three-dimensional water behavior in a PEFC stack was carried out by neutron CT using a neutron image intensifier for clarifying water effects on performances of a Polymer Electrolyte Fuel Cell (PEFC) stack. Neutron radiography system at JRR-3 in Japan Atomic Energy Agency was used. An operating stack with three cells based on Japan Automobile Research Institute standard was visualized. A consecutive CT reconstruction method by rotating the fuel stack continuously was developed by using a neutron image intensifier and a C-MOS high speed video camera. The dynamic water behavior in channels in the operating PEFC stack was clearly visualized 15 sec in interval by the developed dynamic neutron CT system. From the CT reconstructed images, evaluation of water amount in each cell was carried out. It was shown that the water distribution in each cell was correlated well with power generation characteristics in each cell.

Computational Study of Edge Cooling for Open-Cathode Polymer Electrolyte Fuel Cell Stacks

2012 ◽  
Vol 9 (6) ◽  
Author(s):  
Agus P. Sasmito ◽  
Tariq Shamim ◽  
Erik Birgersson ◽  
Arun S. Mujumdar
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Thermal Management ◽  
Computational Study ◽  
Three Dimensional ◽  
Polymer Electrolyte Fuel Cell ◽  
Design Parameters ◽  
Two Phase ◽  
Practical Applications ◽  
The Impact

In open-cathode polymer electrolyte fuel cell (PEFC) stacks, a significant temperature rise can exist due to insufficient cooling, especially at higher current densities. To improve stack thermal management while reducing the cost of cooling, we propose a forced air-convection open-cathode fuel cell stack with edge cooling (fins). The impact of the edge cooling is studied via a mathematical model of the three-dimensional two-phase flow and the associated conservation equations of mass, momentum, species, energy, and charge. The model includes the stack, ambient, fan, and fins used for cooling. The model results predict better thermal management and stack performance for the proposed design as compared to the conventional open-cathode stack design, which shows potential for practical applications. Several key design parameters—fin material and fin geometry—are also investigated with regard to the stack performance and thermal management.

Same-View Nano-XAFS/STEM-EDS Imagings of Pt Chemical Species in Pt/C Cathode Catalyst Layers of a Polymer Electrolyte Fuel Cell

2015 ◽  
Vol 6 (11) ◽  
pp. 2121-2126 ◽  
Author(s):  
Shinobu Takao ◽  
Oki Sekizawa ◽  
Gabor Samjeské ◽  
Shin-ichi Nagamatsu ◽  
Takuma Kaneko ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Chemical Species ◽  
Polymer Electrolyte Fuel Cell ◽  
Cathode Catalyst ◽  
Catalyst Layers

Coals as a novel cathode catalyst for polymer electrolyte fuel cell

Fuel ◽  
2012 ◽  
Vol 94 ◽  
pp. 204-210 ◽  
Author(s):  
Mitsuyoshi Muraoka ◽  
Masatoshi Nagai
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Cathode Catalyst
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