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MM: Fachverband Metall- und Materialphysik

MM 9: Poster

MM 9.27: Poster

Montag, 17. März 2025, 18:30–20:30, P1

Graphite Composites with Titanium as a Secondary Filler - Microstructure and Electronics — •Hoang Thinh Nguyen, Maria Gaudig, and Ralf Wehrspohn — Martin Luther University Halle-Wittenberg, Institute of Physics, Group μMD, Heinrich-Damerow-Str. 4, 06120 Halle (Saale), Germany

The bipolar plate (BPP) is a crucial component in electrolyzers and fuel cell stacks, serving to separate individual electrochemical cells while ensuring electrical conductivity, water distribution, and mechanical stability. However, the high costs associated with conventional materials like titanium or stainless steel demand the exploration of novel materials and fabrication methods. Graphite-based composites have already emerged as cost-effective alternatives for BPPs. In this work, we developed and characterized an innovative composite material that combines the high electrical conductivity of titanium with the affordability and lamellar structure of graphite to create titaniumgraphite composites. Microstructural analyses using scanning electron microscopy (SEM) and nano X-ray computed tomography revealed that titanium particles integrate gapless into the graphite matrix, enhancing the creation of continuous conductive pathways. Electrical conductivity measurements revealed interesting dependencies on filler composition: depending on the filler ratio, either titanium or graphite becomes the dominant contributor to the overall conductivity. These findings highlight the interrelation between particle morphology, structure, and filler ratio in optimizing the composite matrix for BPP applications.

Keywords: Bipolar plates; Electrolysis; Hydrogen; Composite; Sustainability