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Hydrogen Mass Transport in Fuel Cell Gas Diffusion Electrodes

✍ Scribed by J. St-Pierre

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
333 KB
Volume
11
Category
Article
ISSN
1615-6846

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✦ Synopsis

An oxygen transport model derived for limiting current density operation was employed to explore its use for hydrogen transport. Limiting current data obtained from a variety of fuel cell designs (alkaline, proton exchange membrane, sulphuric acid) demonstrated the model's validity and allowed determination of the hydrogen mass transport coefficient, a key cell performance parameter. Under specific operating conditions, the proposed model is consistent with the continuous stirred tank reactor and the logarithmic mean concentration difference models. The proposed model is preferable because it is more general and derived from a specific physical mechanism. Experimental precautions needed to ensure well-defined limiting currents without the presence of artefacts were reemphasized and expanded. Model use for predictive purposes is also briefly discussed.

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