Regensburg 2025 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 40: Energy Storage and Batteries II

CPP 40.7: Vortrag

Freitag, 21. März 2025, 11:00–11:15, H34

Measuring Local Electrochemical Properties with Scanning Probe Microscopy — •Alexander Klasen and Andrea Cerreta — Park Systems Europe GmbH, Mannheim, Germany

Electrochemical (EC) applications, ranging from novel energy storage systems to advanced catalysts, are defined on an ever-decreasing length scale. Investigating these systems requires to map key functional features with sufficient resolution, such as the local structure, electronic properties and electrochemical response. Scanning probe microscopy-based techniques are well established to investigate surface parameters using the physical interaction with a nanometer-sized probe allows studying properties such as the topography, work function, or adhesion at high resolution. One such technique, Scanning Electrochemical Cell microscopy (SECCM), was first introduced by E. Daviddi, P.R. Unwin, et al. and uses a pipette-based SPM approach to probe local EC features. When brought in close proximity to the sample, the electrolyte-filled pipette pipette creates a small electrolyte meniscus between the pipette aperture and the surface of interest . This confined volume of solution constitutes a small electrochemical cell that allows for local measurements of electrochemical characteristics. In this talk, we discuss the basics of SECCM, present recent examples from literature, discuss the limitations of the technique and outline potential pathways to overcome those.

Keywords: SECCM; Electrochemistry; microscopy; surface; analysis