Stress Measurement and SEM Observation of NMC Particles during In-Situ Nanoindentation
SM2026-01
In battery materials research, there is a need to evaluate the microstructure and crack behaviors of NMC particles used in cathode materials. Since localized stresses are applied to the particles during the roll press (calendering) process and the charge-discharge cycle, it is important to understand their mechanical properties at the particle level. By combining SEM, which allows for the observation of microstructure, with in-situ nanoindentation, which enables real-time evaluation of a particle’s mechanical response under load, it is possible to directly measure mechanical properties at the particle level. This application note presents a case study evaluating the crack formation and propagation behavior, as well as particle size dependence, of NMC811 particles using in-situ nanoindentation within an SEM.