Heenan, TMM;
Tan, C;
Wade, AJ;
Jervis, R;
Brett, DJL;
Shearing, PR;
(2020)
Theoretical transmissions for X-ray computed tomography studies of lithium-ion battery cathodes.
Materials and Design
, 191
, Article 108585. 10.1016/j.matdes.2020.108585.
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Abstract
X-ray computed tomography (CT) has emerged as a powerful tool for the 3D characterisation of materials. However, in order to obtain a useful tomogram, sufficient image quality should be achieved in the radiographs before reconstruction into a 3D dataset. The ratio of signal- and contrast-to-noise (SNR and CNR, respectively) quantify the image quality and are largely determined by the transmission and detection of photons that have undergone useful interactions with the sample. Theoretical transmission can be predicted if only a few variables are known: the material chemistry and penetrating thickness e.g. the particle diameter. This work discusses the calculations required to obtain transmission values for various Li(NiXMnYCoZ)O2 (NMC) lithium-ion battery cathodes. These calculations produce reference plots for quick assessment of beam parameters when designing an experiment. This is then extended to the theoretical material thicknesses for optimum image contrast. Finally, the theoretically predicted transmission is validated through comparison to experimentally determined values. These calculations are not exclusive to NMC, nor battery materials, but may be applied as a framework to calculate various sample transmissions and therefore may aid in the design and characterisation of numerous materials.
| Type: | Article |
|---|---|
| Title: | Theoretical transmissions for X-ray computed tomography studies of lithium-ion battery cathodes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.matdes.2020.108585 |
| Publisher version: | https://doi.org/10.1016/j.matdes.2020.108585 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Battery, Electrode, Microstructure, X-ray computed tomography, NMCX-ray attenuation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10093660 |
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