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Deep learning-based segmentation of lithium-ion battery microstructures enhanced by artificially generated electrodes
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Deep learning-based segmentation of lithium-ion battery microstructures enhanced by artificially generated electrodes
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Journal Article
Deep learning-based segmentation of lithium-ion battery microstructures enhanced by artificially generated electrodes
2021
Overview
Accurate 3D representations of lithium-ion battery electrodes, in which the active particles, binder and pore phases are distinguished and labeled, can assist in understanding and ultimately improving battery performance. Here, we demonstrate a methodology for using deep-learning tools to achieve reliable segmentations of volumetric images of electrodes on which standard segmentation approaches fail due to insufficient contrast. We implement the 3D U-Net architecture for segmentation, and, to overcome the limitations of training data obtained experimentally through imaging, we show how synthetic learning data, consisting of realistic artificial electrode structures and their tomographic reconstructions, can be generated and used to enhance network performance. We apply our method to segment x-ray tomographic microscopy images of graphite-silicon composite electrodes and show it is accurate across standard metrics. We then apply it to obtain a statistically meaningful analysis of the microstructural evolution of the carbon-black and binder domain during battery operation.
Accurate 3D representations of lithium-ion battery electrodes can help in understanding and ultimately improving battery performance. Here, the authors report a methodology for using deep-learning tools to reliably distinguish the different electrode material phases where standard approaches fail.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
