Abstract
The laser-induced processes can impede the accurate interpretation of experimentally measured Raman spectra. In this work we have studied how an increase in the excitation laser power can change the parameters Raman spectra for lithium titanate Li4Ti5O12, a commercial anode material for high-power and long-lasting lithium-ion batteries. Although for 633 nm laser of 15.9 mW the measured laser-induced shifts were of few cm–1, this can correspond to laser-induced heating for more than 100°C. Statistical analysis has demonstrated that this doesn’t induce LTO degradation but, possibly, the combined action of heat and laser-matter interaction is enough for some minor but still measurable change of Raman spectra parameters, which can be attributed to laser-induced structuring.
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ACKNOWLEDGMENTS
The authors are grateful to Vadim S. Gorshkov for providing the sample. The Raman spectra measurements were made using equipment of the Ural Center for Shared Use “Modern nanotechnology” Ural Federal University (Reg. no. 2968), supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 075-15-2021-677).
Funding
The research was funded by the Russian Science Foundation (project no. 22-22-00350, https://rscf.ru/project/22-22-00350).
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Nikiforov, A.A., Pelegov, D.V. Big-Data Approach to Study Laser-Induced Effects during Raman Spectra Measurement in Li4Ti5O12. Bull. Russ. Acad. Sci. Phys. 87 (Suppl 1), S1–S7 (2023). https://doi.org/10.1134/S1062873823704348
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DOI: https://doi.org/10.1134/S1062873823704348