Production of Silica from Industrial Silica Waste and Their Use as An Anode for Lithium-Ion Batteries
Zharylkan S. Sultakhan S. Liu J. Merkibayev Y. Baibotayeva A. Askaruly K. Rysbekov K. Begentayev M. Azat S.
December 2025Engineered Science Publisher
ES Materials and Manufacturing
2025#30
In this work, presents an approach to the utilization of agro-industrial and mining and metallurgical waste to obtain anode materials for lithium-ion batteries. Amorphous silicon dioxide (SiO₂) was synthesized from metallurgical waste by alkaline leaching, and highly porous activated carbon (AC) was obtained from rice husks by carbonization and activation with KOH. Based on these components, SiO₂/C composites with a developed texture and uniform structure were formed. Structural and morphological studies (XRD, SEM/EDS, nitrogen adsorption-desorption) confirmed the amorphous nature of SiO₂ and the microporous-mesoporous structure of AC. Electrochemical tests in CR2032 cells showed a high initial discharge capacity with partial irreversibility associated with the formation of the interphase layer (SEI), and stable cycling in the future. Cyclic voltammetry revealed the reversibility of the lithiation/delithiation processes, and impedance spectroscopy recorded moderate charge transfer resistance and efficient lithium diffusion. The results confirm that waste-derived SiO₂/C composites are environmentally sustainable and cost-effective anode materials with acceptable capacity, high coulombic efficiency and stability, making them promising for use in lithium-ion batteries.
Activated carbon , Anode , Composite , Energy storage , SiO2
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Satbayev University, 22 Satbaev street, Almaty, 050000, Kazakhstan
Al-Farabi Kazakh national university, 71 Al-Farabi, Almaty, 050040, Kazakhstan
Satbayev University
Al-Farabi Kazakh national university
10 лет помогаем публиковать статьи Международный издатель
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