Electrode and cell manufacturing involves a complex interplay of many process steps during which the properties of the electrodes continuously change. It is therefore essential to monitor the properties of intermediate products throughout the process so that process changes or undesirable effects can be detected in a timely manner. Electrical and mechanical tests have become established methods for inspecting electrodes, functioning as quality gates. One challenge, however, is that none of these methods is standardized, and each company and research institution typically has its own standards, making it impossible to compare results across different production lines. One of the most widely used methods is the peel test.
The goal of this work is to analytically investigate the 90° peel test and thereby lay the groundwork for understanding and establishing this mechanical testing method. The initial focus will be on investigations into fracture behavior. For other materials, such as adhesives, a simple classification of fracture patterns is often performed. This is not possible with electrodes, as they are a complex composite of various active and inactive materials. Therefore, fundamental research is necessary here to classify the failure patterns and, consequently, to draw conclusions about the electrode properties. To this end, custom electrodes will be fabricated in which the mechanical properties of the electrodes are specifically modified.
Scope of the work:
The student work can be carried out as part of a Bachelor's, student research project or Master's thesis.
By arrangement, preferably immediately.