Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.524
Publication date: 16th December 2024
In-situ and operando atomic force microscopy are powerful tools to investigate various energy storage and energy conversion systems such as batteries, fuel cells, or electrocatalytic systems. By utilizing this method, the solid electrolyte interface (SEI) formation as well as Li intercalation and deposition on anode materials have been elucidated.[1,2,3] Various degrees of heterogeneity are found depending on the exact system under investigation. Importantly, the local mechanical properties of the interfaces that are obtained simultaneously with the topography and are critically discussed in this presentation. Furthermore, the dependency of mechanical properties on the state-of-charge is outlined.[4]
Next to morphological and mechanical information, a full understanding of the local electronic conductivity of electrode materials is of utmost importance. In this contribution, limitations of the conductivity of electrospun carbon nanofibers (CNFs) are presented with respect to the carbonization temperature.[5] A large fraction of the surface of CNFs are found to be not conductive, critically depending on the carbonization temperature. The detected current signals indicate electrically well-interconnected fibers; hence, poor interconnections or heterogeneities of CNF mats are not the limiting factor for an ideal macroscopic conductivity.
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