Modeling of polymer electrolyte membrane fuel cell with circular and elliptical cross-section gas channels: A novel procedure

2018 ◽  
Vol 42 (8) ◽  
pp. 2805-2822 ◽  
Author(s):  
Nima Ahmadi ◽  
Abdolrahman Dadvand ◽  
Iraj Mirzaei ◽  
Sajad Rezazadeh
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Cross Section ◽  
Polymer Electrolyte Membrane ◽  
Elliptical Cross Section ◽  
Elliptical Cross ◽  
Electrolyte Membrane

scholarly journals Review of the Durability of Polymer Electrolyte Membrane Fuel Cell in Long-Term Operation: Main Influencing Parameters and Testing Protocols

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4048
Author(s):  
Huu Linh Nguyen ◽  
Jeasu Han ◽  
Xuan Linh Nguyen ◽  
Sangseok Yu ◽  
Young-Mo Goo ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Failure Modes ◽  
Polymer Electrolyte Membrane ◽  
Durability Test ◽  
Term Operation ◽  
Electrolyte Membrane ◽  
Transportation Applications ◽  
Testing Protocols

Durability is the most pressing issue preventing the efficient commercialization of polymer electrolyte membrane fuel cell (PEMFC) stationary and transportation applications. A big barrier to overcoming the durability limitations is gaining a better understanding of failure modes for user profiles. In addition, durability test protocols for determining the lifetime of PEMFCs are important factors in the development of the technology. These methods are designed to gather enough data about the cell/stack to understand its efficiency and durability without causing it to fail. They also provide some indication of the cell/stack’s age in terms of changes in performance over time. Based on a study of the literature, the fundamental factors influencing PEMFC long-term durability and the durability test protocols for both PEMFC stationary and transportation applications were discussed and outlined in depth in this review. This brief analysis should provide engineers and researchers with a fast overview as well as a useful toolbox for investigating PEMFC durability issues.

scholarly journals Morphological effect of side chain on H3O+ transfer inside polymer electrolyte membranes across polymeric chain via molecular dynamics simulation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
JinHyeok Cha
Keyword(s):  
Fuel Cell ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Dynamics Simulation ◽  
Polymeric Chain ◽  
Side Chains ◽  
Dynamic Simulations ◽  
Morphological Effect ◽  
Electrolyte Membrane

AbstractPerformance and durability of polymer electrolyte membrane are critical to fuel cell quality. As fuel cell vehicles become increasingly popular, membrane fundamentals must be understood in detail. Here, this study used molecular dynamic simulations to explore the morphological effects of perfluorosulfonic acid (PFSA)-based membranes on ionic conductivity. In particular, I developed an intuitive quantitative approach focusing principally on hydronium adsorbing to, and desorbing from, negatively charged sulfonate groups, while conventional ionic conductivity calculations featured the use of mean square displacements that included natural atomic vibrations. The results revealed that shorter side-chains caused more hydroniums to enter the conductive state, associated with higher ion conductivity. In addition, the hydronium path tracking showed that shorter side-chains allowed hydroniums to move among host groups, facilitating chain adsorption, in agreement with a mechanism suggested in earlier studies.

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