Comparison of SnO2-carbon nanotubes composite and the SnO2-carbon black mixture as an anode for Li-ion batteries

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Diao, G.Q.^1 ; Li, H.^1 ; Ivanenko, I.^2 ; Dontsova, T.^2 ; Astrelin, I.^2 ; Xie, F.Y.^1 ; Guo, X.Z.^1

School of Chemistry and Materials Engineering, Huizhou University, Huizhou

516007, China^1

Department of Inorganic Substances Technology, Water Treatment and General Chemical Engineering, National Technical University of Ukraine, Igor Sikorsky Kyiv Polytechnic Institute, Kyiv

03056, Ukraine^2

关键词: Anode material;    Average particle size;    Carbon nanotubes composites;    Charge capacities;    CNTs composites;    Comparative studies;    Rate performance;    Reversible capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012022/pdf
DOI  :  10.1088/1757-899X/474/1/012022

来源: IOP

【 摘 要 】

This article reports a comparative study on the electrochemical properties between SnO2-carbon nanotubes (CNTs) composite and SnO2-carbon black (CB) mixture. The SnO2-CNTs composite was directly synthesized by a sol-gel method with purified multi-walled carbon nanotubes and tin chloride. The SnO2-CB mixture was obtained by mixing carbon black with the previously prepared SnO2. XRD profiles of SnO2-CNTs and the obtained SnO2 have shown the pure tin dioxide phase for the composite and the mixture. TEM images confirmed that SnO2 nanoparticles with average particle size of 3-20 nm are deposited on the outer surface of carbon nanotubes, while the SnO2 obtained for the mixture indicate larger average particle size than that of in the SnO2-CNTs composite. These samples were used as anode materials for the lithium ion battery. The SnO2-CNTs composite showed an initial charge capacity of 810 mAg-1 which slightly reduced to 500 mAg-1 after 100 cycles. The SnO2-CB mixture had a smaller capacity, i.e., an initial charge capacity of 350 mAg-1, and decreased to 230 mAg-1 after 100 cycles. A reversible capacity at 0.2 Ag-1 was recovered for both samples after the cycling at different current densities, which implies excellent rate performance of the materials.