Origin of Potential Drops of Bipolar Polymer Electrolyte Membrane Fuel Cells in Constant Current Discharge

2000 ◽  
Author(s):  
Rongzhong Jiang ◽  
Charles Walker ◽  
Deryn Chu
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Constant Current ◽  
Current Discharge ◽  
Electrolyte Membrane

scholarly journals Development of Optimal Conditioning Method to Improve Economic Efficiency of Polymer Electrolyte Membrane (PEM) Fuel Cells

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2831 ◽  
Author(s):  
Min Soo Kim ◽  
Joo Hee Song ◽  
Dong Kyu Kim
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Market Access ◽  
Polymer Electrolyte Membrane ◽  
Pem Fuel Cells ◽  
Operating Conditions ◽  
Constant Current ◽  
Membrane Electrode ◽  
Electrolyte Membrane ◽  
Optimal Conditioning

This study presents an economical conditioning method for polymer electrolyte membrane (PEM) fuel cells through a parametric study investigating the factors affecting online conditioning methods. First, we compared the operating conditions between constant current (CC) mode and constant voltage (CV) mode conditioning to understand the effects of current and potential differences on conditioning. We found that CV mode conditioning is at least one hour faster at the same load. This is because unlike CV mode conditioning, which has a constant load over the entire range of the membrane electrode assembly (MEA), CC mode conditioning features current flow through the existing passage of the pre-activated triple phase boundary of the MEA so that the electronic load is not entirely used in the conditioning process. Second, the optimization of CV mode conditioning was conducted by controlling the conditioning temperature. Lastly, the economics of the proposed method were analyzed by comparing it with existing conditioning methods. Using this optimal conditioning method can reduce the consumption of hydrogen during conditioning by ~87.5% compared to previous methods. The findings from this study provide the means to lower the actual production cost of fuel cells, thereby ensuring market access.

Effect of gas composition on Ru dissolution and crossover in polymer-electrolyte membrane fuel cells

2010 ◽  
Vol 195 (15) ◽  
pp. 4622-4627 ◽  
Author(s):  
Tommy T.H. Cheng ◽  
Nengyou Jia ◽  
Vesna Colbow ◽  
Silvia Wessel ◽  
Monica Dutta
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Composition ◽  
Electrolyte Membrane

scholarly journals Correlating high temperature thin film ionomer electrode binder properties to hydrogen pump polarization

2021 ◽  
Author(s):  
Gokul Venugopalan ◽  
Deepra Bhattacharya ◽  
Subarna Kole ◽  
Cameron Ysidron ◽  
Polyxeni P. Angelopoulou ◽  
...  
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
High Temperature ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Pem Fuel Cells ◽  
Profound Impact ◽  
Electrolyte Membrane ◽  
Electrode Binder ◽  
Hydrogen Pump

Ionomer electrode binders are important materials for polymer electrolyte membrane (PEM) fuel cells and electrolyzers and have a profound impact on cell performance. Herein, we report the effect of two...

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