Investigation of the process mechanisms in laser-based microstructure adaptation of lithium-ion electrodes by fast IR-emission measurement

Abstract

Microstructural adaptation of surfaces for the production of highly specialized functionalities is becoming more and more important in many industrial fields due to significantly enhanced product properties. One of these areas is the microstructure adaptation of lithium-ion battery electrodes, which can be improved in many different ways through the modification. However, in order to be able to scale up processes such as selective surface ablation or geometric structure adaptation, fundamental knowledge of process mechanisms as well as beam-matter interactions is necessary. In the present study, geometric structuring for microstructure adaptation of lithium-ion battery electrodes, were investigated using a fast IR measurement technique. With the help of these investigations, it could be shown how a potential ablation mechanism is taking place. This knowledge can support the transformation of such processes from the laboratory scale to a larger production scale. Composite electrodes were used as material, which consist of a large proportion of graphite and a small proportion of polymer binder.