Liquid and oxygen transport through bilayer gas diffusion materials of proton exchange membrane fuel cells

2012 ◽  
Vol 55 (23-24) ◽  
pp. 6363-6373 ◽  
Author(s):  
Rui Wu ◽  
Qiang Liao ◽  
Xun Zhu ◽  
Hong Wang
Keyword(s):  
Fuel Cells ◽  
Oxygen Transport ◽  
Proton Exchange Membrane ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Exchange Membrane

Failure behavior of gas diffusion layer in proton exchange membrane fuel cells

2021 ◽  
Vol 515 ◽  
pp. 230655
Author(s):  
Yange Yang ◽  
Xiangyang Zhou ◽  
Fumin Tang ◽  
Bing Li ◽  
Pingwen Ming ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Diffusion Layer ◽  
Proton Exchange Membrane ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Failure Behavior ◽  
Exchange Membrane

Design Concepts for Directed Exit Flow in Micro Fuel Cells

2004 ◽  
Author(s):  
Wei Shi ◽  
Sang-Joon Lee
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Design Concepts ◽  
New Concepts ◽  
And Performance ◽  
Electronic Load ◽  
Exchange Membrane

Miniature and micro fuel cells continue to advance as promising alternatives for efficient and portable electric power. This paper presents a study of experimental modifications to the exit flow configuration of microchannels used in small proton-exchange-membrane fuel cells. New concepts for exit geometry are presented, which promote effective water removal and provide reactant back-pressure in an efficient and self-contained manner. Cell assembly is designed such that reactants must necessarily flow laterally through the gas diffusion electrodes near the exit, rather than simply pass over the free backside surfaces of these electrodes. Multiple prototypes were produced using microfabrication techniques with channel sizes of 100 and 200 microns, and performance was tested using a hydrogen-air test station with programmable electronic load. One of the new concepts in particular showed a marked improvement from 28 mW/cm2 peak power density under baseline conditions to 37 mW/cm2 for the modified design under similar operating conditions. The design offers an opportunity for higher performance in miniature fuel cells with low gas consumption and no additional cost.

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