Perfluorosulfonic acid-functionalized Pt/carbon nanotube catalysts with enhanced stability and performance for use in proton exchange membrane fuel cells

Carbon ◽  
2011 ◽  
Vol 49 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Daping He ◽  
Shichun Mu ◽  
Mu Pan
Keyword(s):  
Fuel Cells ◽  
Carbon Nanotube ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Perfluorosulfonic Acid ◽  
And Performance ◽  
Exchange Membrane ◽  
Enhanced Stability

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.

scholarly journals Mechanical behavior of a hydrated perfluorosulfonic acid membrane at meso and nano scales

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9594-9603 ◽  
Author(s):  
Cong Feng ◽  
Yan Li ◽  
Kunnan Qu ◽  
Zhiming Zhang ◽  
Pengfei He
Keyword(s):  
Mechanical Properties ◽  
Fuel Cells ◽  
Mechanical Behavior ◽  
Internal Structure ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Membrane Material ◽  
Perfluorosulfonic Acid ◽  
The Stability ◽  
Exchange Membrane

Perfluorosulfonic acid (PFSA) is widely used as the membrane material for proton-exchange membrane fuel cells, and its mechanical properties directly affect the stability and the life of the internal structure of the proton exchange membrane.

scholarly journals Effect of extended short-circuiting in proton exchange membrane fuel cells

2020 ◽  
Vol 4 (11) ◽  
pp. 5739-5746
Author(s):  
Panagiotis Trogadas ◽  
Jason I. S. Cho ◽  
Nidhi Kapil ◽  
Lara Rasha ◽  
Albert Corredera ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Detrimental Effect ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
And Performance ◽  
Exchange Membrane

The detrimental effect of extended short-circuiting in the degradation of catalyst layer and performance of proton exchange membrane fuel cells.

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