scholarly journals Distribution of Relaxation Times: A Tool for Measuring Oxygen Transport Resistivity of a Low–Pt PEM Fuel Cell Cathode

2020 ◽  
Vol 167 (14) ◽  
pp. 144505
Author(s):  
Tatyana Reshetenko ◽  
Andrei Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Oxygen Transport ◽  
Relaxation Times ◽  
Pem Fuel Cell ◽  
Fuel Cell Cathode ◽  
Cell Cathode

scholarly journals A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times

2021 ◽  
Vol 9 ◽  
Author(s):  
Andrei Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Oxygen Transport ◽  
Relaxation Times ◽  
Catalyst Layer ◽  
Pem Fuel Cell ◽  
Negative Real Part ◽  
Gas Diffusion ◽  
Transport Processes ◽  
Transport Layer ◽  
Cathode Side

Impedance of all oxygen transport processes in PEM fuel cell has negative real part in some frequency domain. A kernel for calculation of distribution of relaxation times (DRT) of a PEM fuel cell is suggested. The kernel is designed for capturing impedance with negative real part and it stems from the equation for impedance of oxygen transport through the gas-diffusion transport layer (doi:10.1149/2.0911509jes). Using recent analytical solution for the cell impedance, it is shown that DRT calculated with the novel K2 kernel correctly captures the GDL transport peak, whereas the classic DRT based on the RC-circuit (Debye) kernel misses this peak. Using K2 kernel, analysis of DRT spectra of a real PEMFC is performed. The leftmost on the frequency scale DRT peak represents oxygen transport in the channel, and the rightmost peak is due to proton transport in the cathode catalyst layer. The second, third, and fourth peaks exhibit oxygen transport in the GDL, faradaic reactions on the cathode side, and oxygen transport in the catalyst layer, respectively.

scholarly journals Durability of PEM fuel cell cathode in the presence of Fe3+ and Al3+

2010 ◽  
Vol 195 (24) ◽  
pp. 8089-8093 ◽  
Author(s):  
Hui Li ◽  
Ken Tsay ◽  
Haijiang Wang ◽  
Jun Shen ◽  
Shaohong Wu ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Fuel Cell Cathode ◽  
Cell Cathode

Evaluation of the Corrosion Resistance of Carbons for Use as PEM Fuel Cell Cathode Supports

2015 ◽  
Vol 162 (12) ◽  
pp. F1333-F1341 ◽  
Author(s):  
Farisa Forouzandeh ◽  
Xiaoan Li ◽  
Dustin W. Banham ◽  
Fangxia Feng ◽  
Siyu Ye ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Fuel Cell Cathode ◽  
Cell Cathode
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