Eurofins EAG Laboratories will be presenting a poster on Machine-Learning Assisted Analysis of Battery Electrode by PFIB-SEM Tomography at Microscopy & Microanalysis in Cleveland, OH. The poster session will be held on Monday, July 29, 2024 from 3:00 – 5:00 pm. This will be part of Symposium A08.P1 – New Opportunities in Material Science – Multi-dimensional Imaging and Advanced Data Processing. We hope to see you there!
Three-dimensional (3D) characterizations of battery electrodes and active materials are essential to understanding their microstructure. This in turn provides essential insight into the cell performance. During battery cycling, particle morphological change, including cracking and disintegration, can lead to cell degradation. These morphological degradations can range from micrometers to nanometers in scale. Plasma based focused ion beam-scanning electron microscopy (PFIB-SEM) tomography can access representative volume efficiently, while it is able to provide dataset with nm scale spatial resolution and hundreds of µm field of view. Though the tomography techniques are well developed, gaining quantitative information from the representative 3D volume data is still demanding.
In this work, a used commercial lithium-ion battery was disassembled, and its electrode stack was first mechanically cut and polished. Then, a stack of cross-sectional SEM images was collected using a ThermoFisher Helios 5 PFIB UXe. With this dataset, we demonstrated a machine-learning assisted imaging analysis approach to reveal the microstructure and nanostructure of a cathode electrode and individual particles from a lithium-ion battery. Potentially, this method can be applied to understand local heterogeneity within one battery to dig out the cell degradation mechanism. Additionally, it can also be used to compare the particle morphology of the same type of batteries before and after cycling to find out the courses to capacity fade.
We’ll also be presenting Automated Bandgap Measurements in Optoelectronic Devices by Monochromated Electron Energy-Loss Spectroscopy. Learn more!
Supplier verification can be critical to the long-term success of your product and business. At Eurofins EAG, our technical experts have many years of experience working with battery materials. We are your battery partner to bring your product to market faster and more efficiently.
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AC-STEM analysis can provide a visual representation of non-uniformities in an active region. Roughness can easily be observed within interfaces. EDS maps can then be used to corroborate the roughness in relation to composition.
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