References. The project will provide, for the first time, crucial information on the water management of real-size pemfc which are required for the improvement of stack

The project will provide, for the first time, crucial information on the water management of real-size PEMFC which are required for the improvement of stack prototypes for transportation and stationary applications.

Summary of the goals

We also propose to design a specific single cell in order to perform, for the first time, on the same cell SANS experiments, high resolution and low resolution neutron imaging in order to have a complete view of the three dimensional repartition of water, that-is-to-say water amount within the membrane (through-plane) and within the Anode and Cathode Gas Diffusion Layers (in-plane).

Complete 3D characterization of water distribution

Current density distribution

In this post-doc, we plan to perform SANS experiments on a large size single cell with the design and constraints of a prototype stack presenting the best state-of-the-art performance and durability. For the first time, it will be possible to quantify the water content in the membrane and outside the membrane in a real full-scale PEMFC.

The distribution of the current density will be measured onto the full scale single cell (same design than for SANS experiments) using a commercial device from S⁺⁺. This kind of measurements is commonly carried out at CEA. The knowledge of the distribution of both current density and water on a common real size cell design is of prime importance for a deep understanding of fuel cell operation and is one of the most original results expected at the end of the post-doc.

This post-doc has two main goals: i/ quantify the effect of operating parameters and ageing on the current density and water distribution in a full-scale single PEMFC fully representative of those integrated in cars, boats or stationary power plants have three main goals (Figure 5). ii/ Design a specific cell to conduct SANS, low and high resolution neutron imaging and perform characterizations in representative operating conditions.

Figure 5. Picture of full-scale single PEMFC

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