What question did this study set out to answer?

The study aims to clarify the crystal structure and phase composition of Si@O@Al nanocomposite electrodes.

March 26, 2026

Crystal Structure and Phase Composition of the Electrode Composite Material Si@O@Al

ARA. S. RudyYaroslavl State University EKE. A. KozlovYaroslavl State University SKS. V. KurbatovYaroslavl State University

Key Points

The study aims to clarify the crystal structure and phase composition of Si@O@Al nanocomposite electrodes.
Utilized transmission electron microscopy to analyze structure.
Conducted X-ray diffraction for phase identification.
Employed Raman spectroscopy for material characterization.
Identified main phases as a-Si(Al) and nc-Si(Al) solid solutions.
Estimated 43% of the composite consists of the nc-Si(Al) crystalline phase.
Crystallite sizes of nc-Si(Al) range from 0.8 to 3.5 nm, indicating high stability during lithiation.

Abstract

The results of the structure and phase composition study of the Si@O@Al nanocomposite electrode material, using transmission electron microscopy, X-ray diffraction, and Raman spectroscopy are presented. It is shown that the main phases forming the composite are a-Si(Al) and nc-Si(Al) solid solutions, and their ratios are determined. The proportion of the nc-Si(Al) crystalline phase is estimated as 43%, the nc-Si(Al) crystallite sizes range from 0.8 to 3.5 nm, ensuring high stability of Si@O@Al during lithiation.

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