COMPARATIVE ANALYSIS OF TI₃C₂T_X/SI NANOCOMPOSITES OBTAINED BY A MECHANOCHEMICAL METHOD

This study investigates the fundamental regularities of heterostructure formation based on twodimensional titanium carbides (Ti₃C₂T_x MXene) and silicon-containing modifiers of various origins. The relevance of the work is driven by the necessity to develop stable anode materials capable of mitigating the significant volume changes of silicon during electrochemical cycling. Crystalline silicon, biogenic silicon derived from rice husks, and amorphous silicon dioxide with variable dispersity were examined as precursors.The synthesis of nanocomposites was carried out using high-energy mechanochemical activation in a reducing ethanol medium. A comprehensive analysis using scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed that the use of biogenic amorphous modifiers provides the most precise coating uniformity of MXene lamellae. It was found that the key factor in interface stabilization is the formation of covalent Si–O–Ti bridge bonds, initiated by the presence of active hydroxyl groups on the surface of the biogenic raw material.It was established that the use of ethanol as a dispersion medium effectively prevents degradation and oxidation of the titanium matrix, contributing to the preservation of the composite's lamellar architecture. The results obtained expand the scientific and technological base for the development of highperformance next-generation electrodes for lithium-ion energy storage systems and functional catalytic coatings.

1. Burgeoning Silicon/MXene Nanocomposites for Lithium Ion Batteries: A Review / P. Zhang et al // Advanced Functional Materials. – 2024. – № 34(37). https://doi.org/10.1002/adfm.202402307.

2. MXene/Si@SiOx@C Layer-by-Layer Superstructure with Autoadjustable Function for Superior Stable Lithium Storage / Y. Zhang et al // ACS Nano – 2019. – № 13(2). – Р. 2167-2175. https://doi.org/10.1021/acsnano.8b08821.

3. Ti3C2Tx MXene Nanosheets as a Robust and Conductive Tight on Si Anodes Significantly Enhance Electrochemical Lithium Storage Performance / M. Xia et al // ACS Nano. – 2020. – № 14(4). – Р. 5111-5120. https://doi.org/10.1021/acsnano.0c01976.

4. Sun L. Silicon-Based Materials from Rice Husks and Their Applications / L. Sun, K. Gong // Industrial & Engineering Chemistry Research. – 2001. – № 40(25). – Р. 5861-5877. https://doi.org/10.1021/ie010284b.

5. MXene Frameworks Promote the Growth and Stability of LiF-Rich Solid–Electrolyte Interphases on Silicon Nanoparticle Bundles / Y. Yan et al // ACS Applied Materials & Interfaces. – 2020. – № 12(16). – Р. 18541-18550. https://doi.org/10.1021/acsami.0c01959.

6. Oboh I. Use of Rice Husk and Rice Husk Ash for Metallurgical Grade Silicon: The Production, Purification and Upgrade / I. Oboh, A. Ihom, I. Markson // International Journal of Engineering and Modern Technology. – 2023. – № 9(1). – Р. 83-99. https://doi.org/10.56201/ijemt.v9.no1.2023.pg83.99.

7. Electromagnetic characteristics of biosilica from rice husk / V. Buz’ko et al // E3s Web of Conferences. – 2021. – № 263. – Р. 01013. https://doi.org/10.1051/e3sconf/202126301013.

8. Chen J. Thermal contact resistance across nanoscale silicon dioxide and silicon interface / J. Chen, G. Zhang, B. Li // Journal of Applied Physics. – 2012. – № 112(6). https://doi.org/10.1063/1.4754513.

9. 5L-Scale Magnesio-Milling Reduction of Nanostructured SiO2 for High Capacity Silicon Anodes in Lithium-Ion Batteries / W. Cho et al // Nano Letters. – 2016. – № 16(11). – Р. 7261-7269. https://doi.org/10.1021/acs.nanolett.6b03762.

10. Fiber-cement composite using rice stalk fiber and rice husk ash: Mechanical and physical properties / M. Ghofrani et al // Journal of Composite Materials. – 2014. – № 49(26). – Р. 3317-3322. https://doi.org/10.1177/0021998314561813.

11. Hallmann S. The Mechanochemical Formation of Functionalized Semiconductor Nanoparticles for Biological / S. Hallmann, M. Fink, B. Mitchell // Electronic and Superhydrophobic Surface Applications. – 2011. – Р. 129-142. https://doi.org/10.1002/9781118144602.ch13.

12. Heintz A. Silicon nanoparticles with chemically tailored surfaces. / A. Heintz et al // Applied Organometallic Chemistry. – 2004. – № 24(3). – Р. 236-240. https://doi.org/10.1002/aoc.1602.

13. Spectroscopic characterization of quantum-sized TiO2 supported on silica: influence of size and TiO2-SiO2 interface composition / G. Lassaletta et al // The Journal of Physical Chemistry. – 1995. – № 99(5). – Р. 1484-1490. https://doi.org/10.1021/j100005a019.

14. A structural investigation relating to the pozzolanic activity of rice husk ashes / D. Nair et al // Cement and Concrete Research. – 2008. – № 38(6). – Р. 861-869. https://doi.org/10.1016/j.cemconres.2007.10.004.

15. Enhancing Effect of SiOx Monolayer Coverage of TiO2 on the Photoinduced Oxidation of Rhodamine 6G in Aqueous Media / H. Tada et al // The Journal of Physical Chemistry B. – 1998. – № 102(33). – Р. 6360-6366. https://doi.org/10.1021/jp980892d.

16. Comparison of high temperature chars of wheat straw and rice husk with respect to chemistry, morphology and reactivity / A. Trubetskaya et al // Biomass and Bioenergy. – 2016. – № 86. – Р. 76-87. https://doi.org/10.1016/j.biombioe.2016.01.017.