One-pot alternating current synthesis of SnO2 based composite with enhanced diffusion kinetic behaviors for lithium-ion batteries
Guo-qiang Zhang, Ming-jun Jing, Li He, Dan Li, Yu-feng Wu, Ming-guang Yi, Cheng Liu, Xing-yu Wang, Hong-hui Hu, Meng Wu, Tian-jing Wu, Yu-jie Huang, Hong-shuai Hou
Journal of Central South University ›› 2025, Vol. 31 ›› Issue (12) : 4424-4436.
One-pot alternating current synthesis of SnO2 based composite with enhanced diffusion kinetic behaviors for lithium-ion batteries
SnO2 is used as electrode material with excellent properties, but it has some disadvantages such as slow reaction kinetics, low inherent conductivity and complex preparation process. Here, SnO2@carbon nanotubes (SnO2@CNTs) is synthesized through an efficient method of one-pot alternating current electrochemical dispersion. By using heat treatment at 400 °C, the SnO2@CNTs-400 composite material with abundant mesoporous structure is obtained, while the crystal particles are grown, and a strong bonding effect is formed with CNTs via powerful Sn—O—C bond. Benefiting from the introduction of high electrical conductivity CNTs and outstanding structural characteristics, as-prepared composite material (SnO2@CNTs-400) exhibit enhanced diffusion dynamics, lithium-ion transmission rate and structural steadiness. The specific capacity of SnO2@CNTs and SnO2@CNTs-400 as anodes for lithium-ion batteries can reach 690.2 mA·h/g and 836.5 mA·h/g, respectively, after 100 cycles at 0.5 A/g. The abundant chemical bonds and porous structure can be formed in composite via alternating current synthesis method, which takes significant in improving electrochemical properties.
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