2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 9 Mizutani Intl. Symp. Science of Intelligent & Advanced Materials (SISAM) and Quasi-crystals
| Editors: | F. Kongoli, J. Dubois, E. Gaudry, T. Homma, V. Fournee |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 116 pages |
| ISBN: | 978-1-989820-50-6(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Characterization of Battery Materials by X-ray Compton Scattering
Hiroshi Sakurai1; Kosuke Suzuki1; Tsuyoshi Takami2; Yoshiharu Uchimoto2; Naruki Tshuji3; Arun Bansil4; Bernardo Barbiellini5; Kazushi Hoshi1; Yoshiharu Sakurai3;1GUNMA UNIVERSITY, Kiryu, Japan; 2KYOTO UNIVERSITY, Kyoto, Japan; 3JASRI, Sayo, Japan; 4NORTHEASTERN UNIVERSITY, Boston, United States; 5LUT UNIVERSITY, Lappeenranta, Finland;
Type of Paper: Invited
Id Paper: 401
Topic: 42
Abstract:
Compton-scattered X-ray spectra correspond to the electron momentum density in matter and reflect the wave function in the ground state [1]. Therefore, it is relatively easy to interpret the observed Compton-scattered X-ray spectrum by ab initio electronic structure calculations. The observed information is bulk-sensitive because prover X-rays have energies above 100 keV and are highly penetrating through materials.
This research focuses on lithium-ion secondary battery materials. In green technologies such as electric vehicles, improvement of rechargeable battery materials is a key to enhance energy density and charge-discharge stability. In practical batteries, it is important to understand redox reactions and their spatial distribution. From a view point of redox reactions, we measured spinel LixMn2O4, a Li-ion battery cathode material. We found that the redox orbital in the lithium insertion and extraction process is mainly the oxygen 2p orbital [2], although the redox orbital has been considered to be manganese 3d states [3,4]. Furthermore, analysis of the shape of Compton-scattered X-ray spectra can be used as a new nondestructive testing (NDT) technique. We proposed S-parameter analysis to observe the spatial distribution of redox reactions in commercial batteries [5].
Our research shows that Compton scattering measurements can provide insight into the mechanism of lithium batteries and point the way to improved battery materials and new battery designs.
Keywords:
Electronic structures; Li ion battery materialsReferences:
references[1] M. J. Cooper et al.,X-ray Compton Scattering (Oxford University Press, Oxford, 2004).
[2] K. Suzuki et al. Phys. Rev. Lett. 114, 087401 (2015).
[3] H. Berg et al., J. Mater. Chem. 9, 2813 (1999).
[4] G. E. Grechnev et al. Phys. Rev. B 65, 174408 (2002).
[5] K. Suzuki et al., J. Appl. Phys. 119, 025103 (2016).