Although active materials for batteries and fuel cells span the entire periodic table, the need for carbon (soot, graphene, carbon nanotubes, etc.) is undisputed. The inherent chemical and physical properties of the raw materials, the interaction between the particle surface and the continuous phase and the dispersing process itself play a role in its dispersibility. Thanks to STEP technology and the multi-sample concept, the LUM analyzers enable the efficient determination of particle size distributions and particle surface properties according to the Hansen parameter concept. Manufactured battery pastes are characterized undiluted with regard to their separation stability.