[10:30] Weekly Online Seminar: Triple-Phase Boundary in PEM Fuel Cell Catalyst Layers. Dr. Peter Berg, UOIT
Date | Monday June 04 2007 |
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Time | 10:30 - 11:30 |
Location | Online (local AG room) |
Contact | Barb Autterson, SHARCNET. |
URL | http://www.sharcnet.ca |
In PEM fuel cells, the triple-phase boundary (TPB) forms an important part of the catalyst layer microstructure. At the cathode pore level, a mathematical model is developed to describe the TPB between ionomer, air pore and C/Pt particles and its reaction-diffusion processes. One challenging feature of the work is its description of the triple-phase contact point (in 2-D) as a singularity, coupled to proton surface diffusion along the air-C/Pt interface. The model offers an insight into where the oxygen reduction reaction takes place and how the shape of the domain impacts the overall performance of the structure. |