Fabrication and application of network-liked carbon coated SiO as anode material for lithium ion batteries

• Published in: Materials letters 2023-08, Vol.345, p.134446, Article 134446
• Main Authors: Wang, Li, Tang, Qiwei, Zhao, Changfeng, Zhang, Shuai, Zhao, Haijing
• Format: Article
• Language: English
• Subjects: Anode; Carbon coating; Energy storage and conversion; Lithium-ion battery; SiO/C composite
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2023.134446

[Display omitted] •Network-liked carbon layer was coated on the surface of SiO particles.•The overall structure of the composite is a type of secondary particle.•The unique structure endows the product with enhanced electrochemical properties. SiO/carbon composite with the network-liked carbon coating layer is prepared by a two-step spray-drying and subsequent pyrolysis method. Such a structure can not only effectively prolongs the cycle performance but also greatly improves the rate capability of the product. As a result, the obtained composite shows a reversible capacity of 1119.4mAh·g−1 after 100 cycles at a current density of 200 mA·g−1. Increasing the current densities to 500 mA·g−1 and 1000 mA·g−1, the capacity can still maintain 887.2mAh·g−1 and 577.7mAh·g−1, respectively, which indicate that the network-liked carbon coated SiO reported in this paper is a promising anode material for lithium-ion batteries.