scholarly journals Experimental Testing of the Proton Change Membrane (PEM) Hydrogen Fuel Cell Performance with Nanographene Oxide

2020 ◽  
Author(s):  
Hazem Tawfik ◽  
Yeong Ryu
Keyword(s):  
Fuel Cell ◽  
Experimental Testing ◽  
Cell Performance ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Fuel Cell Performance

The Influence of Gas Diffusion Media Morphology on Hydrogen Fuel Cell Performance

2018 ◽  
Vol 941 ◽  
pp. 2226-2231
Author(s):  
Benjamin Gould ◽  
Yannick Garsany ◽  
Megan Sassin ◽  
Robert Atkinson III ◽  
Iryna Zenyuk ◽  
...  
Keyword(s):  
Fuel Cell ◽  
High Power ◽  
Product Distribution ◽  
Gas Diffusion ◽  
Cell Performance ◽  
Hydrogen Fuel Cell ◽  
Reaction Products ◽  
Power Performance ◽  
Fuel Cell Performance ◽  
Diffusion Media

Gas diffusion media (GDM) is an integral part of all gas diffusion electrodes because it facilitates both the transport of reactants to the electrocatalyst surface and the removal of reaction products from the system. Proper reactant/product distribution is critical for high power operation in polymer electrolyte fuel cells (PEMFCs) because oxygen transport and water rejection determine the maximum current density that can be obtained from PEMFCs. This paper will discuss NRL’s research on how GDM morphology influences cell performance in both closed-cathode fuel cell and open-cathode fuel cell designs. The comprehensive study linking the influence of compression on the GDM micro and macro structure morphology will be presented using micro X-ray computed tomography (μ-CT), scanning electron microscopy (SEM), N2Physisorption (BET) and traditional electrochemical characterization techniques (CV, Pol. Curves, etc.). Optimal GDM selection for the challenge of open-cathode operation will be presented and related to water retention through rational morphology selection. The relationship between high power performance and water transport will be elucidated and the goals for future GDM properties will be proposed for use in unmanned systems

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