Composite Membrane Analysis and Design

The research team focuses on the heart of electrochemical energy conversion systems such as polymer electrolyte fuel cells and water electrolyzers: The polymer electrolyte. This part of a cell needs to conduct ions while being mechanically stable to ensure electric insulation of the two electrodes. This function needs to be maintained under elevated temperatures, high pressure, and while harsh electrochemical reactions take place.

Therefore, the membranes that act as polymer electrolytes need to be tailored toward high ionic conductivity and excellent thermal, mechanical, and chemical stability. One means to improve the properties of such a polymer electrolyte is the development of composite membranes: Membranes that contain additives or reinforcement layers to enhance, e.g., the resistance toward mechanical stress. In the team, they focus both on the development and the characterization of composite membranes.