Publications de Michele Bozzetti

On Tortuosity and Water Management in Hydrophobic and Hydrophilic Microporous Layers with Different Carbon Structures

To improve mass transport limitations in proton exchange membrane fuel cells (PEMFCs), a detailed analysis of the gas diffusion layer structure can aid to understand the transport processes of oxygen to the catalyst layer and the liquid water removal mecha ...

ELECTROCHEMICAL SOC INC2025

Up-Scaled Preparation of Pt-Ni Aerogel Catalyst Layers for Polymer Electrolyte Fuel Cell Cathodes

Vasiliki Tileli, Michele Bozzetti

High activity and durability are two key requirements for the successful development of Pt-based ORR catalyst layers for polymer electrolyte fuel cell (PEFC) cathodes. Unsupported Pt-Ni aerogels consisting of an interconnected nanoparticle network have bee ...

2024

Catalyst Aggregate Size Effect on the Mass Transport Properties of Non-Noble Metal Catalyst Layers for PEMFC Cathodes

Vasiliki Tileli, Robin Pierre Alain Girod, Michele Bozzetti, Yen-Chun Chen, Secil Unsal

Non-noble metal catalysts (NNMCs) are regarded as a promising alternative to the costly Pt-based materials required to catalyze the oxygen reduction reaction (ORR) in proton exchange membrane fuel cell (PEMFC) cathodes. However, the large diversity of NNMC ...

ELECTROCHEMICAL SOC INC2023

Electron imaging of gas diffusion electrodes for proton exchange membrane fuel cells

Michele Bozzetti

The current energy crisis demands the development of new sustainable energy sources and devices with low environmental impact, including in the field of electrochemical cells. Mass transport limitations can reduce the overall performance of the device by l ...

EPFL2023

On the role of pore constrictions in gas diffusion electrodes

Vasiliki Tileli, Robin Pierre Alain Girod, Michele Bozzetti, Yen-Chun Chen

Water management by gas diffusion electrodes is a fundamental aspect of the performance of electrochemical cells. Herein, we introduce the characteristic constrictions size as a descriptor for microporous layers (MPL). This parameter is calculated by volum ...

Royal Society of Chemistry2022

A Method for Spatial Quantification of Water in Microporous Layers of Polymer Electrolyte Fuel Cells by X-ray Tomographic Microscopy

Vasiliki Tileli, Michele Bozzetti

A microporous layer (MPL) is typically added to the gas diffusion layer of polymer electrolyte fuel cells (PEFCs) to promote cell performance and water management. The transport mechanism of the water through the MPL is, however, not well understood due to ...

AMER CHEMICAL SOC2021