scholarly journals The impact of flow field plate misalignment on the gas diffusion layer intrusion and performance of a high-temperature polymer electrolyte fuel cell

2021 ◽  
Vol 501 ◽  
pp. 230036
Author(s):  
Eugen Hoppe ◽  
Holger Janßen ◽  
Martin Müller ◽  
Werner Lehnert
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Flow Field ◽  
Polymer Electrolyte ◽  
Diffusion Layer ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Field Plate ◽  
And Performance ◽  
The Impact

Review of Materials and Characterization Methods for Polymer Electrolyte Fuel Cell Flow-Field Plates

2006 ◽  
Vol 4 (1) ◽  
pp. 29-44 ◽  
Author(s):  
Daniel J. L. Brett ◽  
Nigel P. Brandon
Keyword(s):  
Fuel Cell ◽  
Flow Field ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cell ◽  
Characterization Methods ◽  
Fuel Cell Stack ◽  
Field Plate ◽  
And Performance ◽  
The Cost

The role of the flow-field plate is of major importance in determining the performance of a polymer electrolyte fuel cell. The flow-field plate constitutes the largest volumetric and gravimetric proportion of the fuel cell stack and has a strong bearing on the cost and efficiency of the system. This review considers the materials being used to make flow-field plates and the methods used to characterize materials properties and performance.

scholarly journals Quantifying phosphoric acid in high-temperature polymer electrolyte fuel cell components by X-ray tomographic microscopy

2014 ◽  
Vol 21 (6) ◽  
pp. 1319-1326 ◽  
Author(s):  
S. H. Eberhardt ◽  
F. Marone ◽  
M. Stampanoni ◽  
F. N. Büchi ◽  
T. J. Schmidt
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Diffusion Layer ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
X Ray ◽  
Wide Range ◽  
Cell Components

Synchrotron-based X-ray tomographic microscopy is investigated for imaging the local distribution and concentration of phosphoric acid in high-temperature polymer electrolyte fuel cells. Phosphoric acid fills the pores of the macro- and microporous fuel cell components. Its concentration in the fuel cell varies over a wide range (40–100 wt% H3PO4). This renders the quantification and concentration determination challenging. The problem is solved by using propagation-based phase contrast imaging and a referencing method. Fuel cell components with known acid concentrations were used to correlate greyscale values and acid concentrations. Thus calibration curves were established for the gas diffusion layer, catalyst layer and membrane in a non-operating fuel cell. The non-destructive imaging methodology was verified by comparing image-based values for acid content and concentration in the gas diffusion layer with those from chemical analysis.

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