Synthesis of SnW3O9/C as novel anode material for lithium-ion battery application

• Published in: Journal of materials science. Materials in electronics 2021-10, Vol.32 (19), p.23935-23943
• Main Authors: Xiao, Yao, Chen, Xiao, Jiang, Qiang, Feng, Chuanqi
• Format: Article
• Language: English
• Subjects: Anodes; Characterization and Evaluation of Materials; Charge transfer; Chemistry and Materials Science; Diffusion coefficient; Discharge; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrode materials; Electrodes; Electron microscopy; Heat treatment; Lithium; Lithium-ion batteries; Low temperature; Materials Science; Microscopy; Microspheres; Morphology; Optical and Electronic Materials; Photoelectrons; Rechargeable batteries; Spectrum analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-06853-y

Both SnW 3 O 9 and SnW 3 O 9 /C microspheres were successfully synthesized by a simple solvothermal method combined with low-temperature heat treatment. The structures and morphologies of the desired samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques. Meanwhile, the electrochemical performances for both SnW 3 O 9 and SnW 3 O 9 /C were tested as anode materials. Compared with the SnW 3 O 9 electrode, the SnW 3 O 9 /C electrode has higher reversible capacity and better cycle performance. At the current density of 1000 mA g −1 , it achieved an initial discharge capacity of 1327 mAh g −1 and retained at 873 mAh g −1 after 175 cycles. Electrochemical impedance spectroscopy (EIS) measurements showed that SnW 3 O 9 /C electrode owned lower charge transfer resistance and larger Li + diffusion coefficient than those of pure SnW 3 O 9, which explained why SnW 3 O 9 /C behaved outstanding electrochemical performance during discharge/charge process. So, the SnW 3 O 9 /C composite is a potential anode material for the lithium-ion battery application.