About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
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Symposium
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5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
Possibilities and Limitations of Tomography Methods for the Detailed Analysis of Lithium-ion Battery Cathode Microstructures |
Author(s) |
Jochen Joos, Stephen T. Kelly, Tobias Volkenandt, Stefanie Freitag, André Weber, Ellen Ivers-Tiffée |
On-Site Speaker (Planned) |
Stephen T. Kelly |
Abstract Scope |
Deep knowledge of the 3D microstructure is essential for optimizing performance in Lithium ion batteries electrodes. Tomography methods like focused ion beam-secondary electron microscopy (FIB-SEM) and X-ray tomography are the most frequently used 3D characterization techniques for battery electrodes. While each method has advantages and disadvantages, understanding the complex morphology of electrodes requires a complementary, multi-scale 3D approach.
In this work, the possibilities and limitations for both 3D techniques, X-ray and FIB-SEM tomography, are studied using the example of a LiNiCoAlO<sub>2</sub>-LiCoO<sub>2</sub> blend cathode from a commercial cell. The same cathode sample was analyzed with both techniques and moreover with different devices to enable a comparison of the obtained data quality. The material fractions, porosity, surface area and tortuosity are calculated from the different data sets and the results are compared with special emphasis on the differentiation of the different active materials and the carbon-binder phase. |
Proceedings Inclusion? |
Definite: Other |