The electrochemical behavior of silica and activated carbon materials derived from the rice husk waste for li-ion cells

Askaruly K. Korobeinyk A.V. Azat S. Yeleuov M. Taurbekov A. Toshtay K. Tauanov Z. Su X.
March 2023 Elsevier Ltd

Diamond and Related Materials
2023 #133

In this work, an amorphous silica powders (1-SiO₂ and 2-SiO₂) and activated carbon with few-layer graphene were derived from rice husk using simple and efficient process. Synthesized samples were characterized by means of TGA SEM, XRD, XRF, nitrogen low-temperature adsorption/desorption, Raman, and EDAX. Rice husk calcination yields in 18 and 14 wt% of 1-SiO₂ and 2-SiO₂, correspondingly. Carbonization of rice husk followed by activation yielded about 11 wt% of activated carbon with large specific surface area (S_BET = 3292 m² g⁻¹). Feasibility of resulting materials as anode materials for Li-ion batteries grounded on a high theoretical capacity of silica and high charge/discharge stability of activated carbon. We present here a 2-SiO₂ material with large specific surface area of 980 m² g⁻¹, of high purity above 99 %, and large pore volume (1.20 cm³ g⁻¹), which results in a reversible capacity of about 841 and 442 mAh g⁻¹ (1st and 50th cycle) with coulombic efficiency higher than 95 %. Activated carbon demonstrated the highest initial discharge specific capacity and stable reversible capacity after 50 cycles as 1462 and 477 mAh g⁻¹ (1st and 50th cycle), and coulombic efficiency higher than 90 %.

Activated carbon , Anode materials , Li-ion battery , Rice husk , Silica

Text of the article Перейти на текст статьи

Satbayev University, Almaty, Kazakhstan
Institute of Combustion Problems, Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, China
Aarhus University, Aarhus, Denmark

Satbayev University
Institute of Combustion Problems
Al-Farabi Kazakh National University
Almaty University of Power Engineering and Telecommunications
School of Environment and Energy
Aarhus University

10 лет помогаем публиковать статьи Международный издатель

Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026