Detecting Aging Phenomena in Commercial Cathodes for Li-Ion Batteries Using High Resolution Computed Tomography

Abstract:

Using high resolution computed tomography (CT) the change of the morphometric parameters in depth of electrodes for lithium ion batteries with aging has been examined. Commercially available 2 Ah Li-ion cells were continuously cycled to different state of health (SOH). The cathodes were subsequently analyzed using CT with voxel size resolution of about 400 nm. For a quantitative analysis binarized images were evaluated and various properties such as the size distribution of active particles analyzed. Using this technique a decrease in the average particle size and an increase in number of particles of LiCoO₂ with decreasing SOH of the battery is confirmed experimentally for the first time.

• Periodical: Advances in Science and Technology (Volume 93)
• Pages: 158-163
• DOI: https://doi.org/10.4028/www.scientific.net/AST.93.158
• Online since: October 2014
• Authors: Lidiya Komsiyska*, Sergio A. Garnica Barragan, Meinert Lewerenz, Daniela Ledwoch, Oliver Osters
• Keywords: Aging, Cathode, Computed Tomography, Li-Ion Batteries

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